The baggage fee you did not expect is one of the most avoidable travel costs there is. A bag that weighs 52 pounds instead of the 50-pound limit costs you $100 or more at the check-in counter on most US airlines. A carry-on that measures 23 x 14 x 9 inches instead of the allowed 22 x 14 x 9 gets gate-checked at peak boarding — sometimes for free, sometimes not. A bag calculator puts the math in your hands before you reach the airport, so you know exactly where you stand on weight, linear inches, and volume before you zip up and leave for the terminal.

This guide covers the formulas for linear inches, volume, weight limits by airline and bag type, overage fees, and the six most common packing mistakes that cost travelers money at check-in. Whether you're flying domestic on a budget carrier or connecting internationally through three different airline policies, the calculation is always the same — and this calculator runs it in seconds.

What Is a Bag Calculator and Why Does It Matter

A bag calculator determines whether a piece of luggage meets an airline's size and weight limits by calculating its linear inches (height plus width plus depth), volume in liters, and comparing current weight against the applicable limit for carry-on, personal item, or checked baggage. Travelers, frequent flyers, travel agents, corporate travel managers, and anyone packing for a trip use it to avoid oversize and overweight fees before reaching the airport. The core formula for size compliance is: Linear Inches equals Height plus Width plus Depth, all measured with wheels and handles extended. Getting this wrong is expensive — overweight checked bag fees range from $75 to $200 per bag per flight on US carriers as of 2026, and a carry-on that fails the gate size check may be forced into checked baggage at the last minute, at full checked bag fee rates.

What You Need Before You Start

Have the following ready before using the bag calculator:

- Your bag's dimensions in inches or centimeters — measure height, width, and depth at the bag's largest points, with wheels fully extended and handles in the upright position, and all external pockets fully packed and bulging as they will be when you travel.

- Your bag's current packed weight in pounds or kilograms — weigh it on a bathroom scale using the step-on method: weigh yourself alone, then weigh yourself holding the bag, and subtract the first number from the second.

- Your airline name and fare class — baggage limits vary not just by airline but by fare type, frequent flyer status, destination, and sometimes route. A basic economy ticket on Delta allows different carry-on rules than a standard economy ticket on the same flight.

- Whether the flight is domestic or international — most US airlines apply stricter or more generous limits on international routes than on domestic ones, and the rules for codeshare or connecting flights governed by a partner airline may differ entirely.

- The number of bags you plan to bring — personal item, carry-on, and up to two checked bags are the most common combinations, and each category has separate size and weight rules.

- Your target trip length — the calculator can reverse-calculate how much you have left to pack if you enter your bag's empty weight and current contents weight against the limit.

How to Use This Bag Calculator Step by Step

Enter your bag details in order for an instant compliance check.

1. Measure your bag with everything packed — height from floor to top of handle, width at widest point, depth front to back at fullest extension. Include wheels in height measurement.

2. Enter the three dimensions into the calculator — select inches or centimeters using the unit toggle.

3. Select your bag type — personal item (under-seat), carry-on (overhead bin), or checked bag.

4. Select your airline from the dropdown — the calculator loads that airline's current published limits for size and weight.

5. Enter your bag's current weight — use pounds or kilograms matching your scale.

6. Click Calculate. Your result shows linear inches, volume in liters, whether you pass or fail on size, weight remaining under the limit, and the estimated fee if you are over.

7. If you are over, the calculator shows exactly how many pounds or linear inches you need to remove to come into compliance — no guesswork about whether shifting one item makes a difference.

The Bag Calculator Formula Explained Simply

Airlines measure luggage in two ways: linear inches (or linear centimeters) for size compliance, and pounds or kilograms for weight compliance. Linear inches is the sum of all three dimensions and is the single most important measurement for checked baggage. Carry-on compliance is often enforced by checking each dimension individually against the allowed maximum — a bag can fail on one dimension even if its linear inches total is within limit.

Linear Inches Formula:

Linear Inches = Height (in) + Width (in) + Depth (in)

Linear Centimeters Formula:

Linear Centimeters = Height (cm) + Width (cm) + Depth (cm)

Unit Conversion:

Pounds to Kilograms: kg = lbs / 2.20462

Kilograms to Pounds: lbs = kg x 2.20462

Inches to Centimeters: cm = inches x 2.54

Centimeters to Inches: inches = cm / 2.54

Volume Estimate (approximate):

Volume (liters) = Height (cm) x Width (cm) x Depth (cm) / 1000

Overage Fee Estimate:

Fee = Overweight Fee Rate (per bag, per flight segment)

This is a flat fee, not a per-pound charge, on most US carriers.

Remaining Capacity:

Weight Remaining = Weight Limit - Current Packed Weight

Linear Inches Remaining = Linear Inches Limit - Current Linear Inches

- Height: measured from the lowest point of the bag (including wheels if they protrude below the base) to the top of the fully extended handle. Realistic range: 14 inches (small personal item) to 32 inches (large checked bag).

- Width: the widest measurement across the front face of the bag. Range: 9 inches (slim laptop bag) to 22 inches (large checked suitcase).

- Depth: front to back at the fullest point including bulging pockets. Range: 5 inches (flat personal item) to 14 inches (fully packed checked bag).

- Weight Limit: varies by airline, route, class, and bag type. Standard US domestic economy: 50 lbs checked, no weight limit specified for carry-on on most US carriers (though a practical overhead bin limit applies). Standard international economy on many carriers: 23 kg (50.7 lbs) checked.

The linear inches formula is the industry standard used by the International Air Transport Association (IATA) and adopted by virtually all commercial airlines worldwide. The 62 linear inches (158 cm) checked bag limit is the IATA-recommended standard for economy class checked baggage and is used by American Airlines, Delta, United, and most major US carriers. The 22 x 14 x 9 inch (55 x 35 x 23 cm) carry-on standard is the most common US domestic carry-on specification.

Bag Calculator Worked Examples

Example1:First-Time Flyer — Checking a Suitcase on Delta Economy

A first-time flyer is checking a medium suitcase on Delta domestic economy. His packed suitcase measures 26 inches tall (with wheels), 18 inches wide, and 11 inches deep, and weighs 48 pounds.

1. Linear inches: 26 + 18 + 11 = 55 linear inches

2. Delta checked bag limit: 62 linear inches, 50 lbs for economy class domestic

3. Size check: 55 linear inches vs 62 allowed — PASS (7 linear inches under limit)

4. Weight check: 48 lbs vs 50 lbs allowed — PASS (2 lbs under limit)

5. Volume: (66 cm x 45.7 cm x 27.9 cm) / 1,000 = approximately 84 liters

6. Weight remaining: 2 pounds — he can add approximately 2 lbs more

7. Delta first checked bag fee (economy, domestic): $35 one-way as of 2026

He passes on both size and weight. His 2-pound buffer is tight — if he adds a full water bottle, shoes, or a travel umbrella, he risks tipping over. A digital luggage scale would confirm before he leaves home. He should budget $35 each way for the checked bag, or $70 round trip, unless he has a Delta SkyMiles credit card that waives the first bag fee.

Example2:Carry-On Compliance — Budget Carrier Size Check on Spirit Airlines

A traveler is flying Spirit Airlines with a rolling carry-on that measures 22 x 14 x 10 inches packed (with wheels), weighing 28 lbs.

1. Linear inches: 22 + 14 + 10 = 46 linear inches

2. Spirit Airlines carry-on limit (paid carry-on): 22 x 18 x 10 inches

3. Individual dimension check:

Height: 22 inches vs 22 allowed — PASS (exactly at limit)

Width: 14 inches vs 18 allowed — PASS (4 inches under)

Depth: 10 inches vs 10 allowed — PASS (exactly at limit)

4. Weight: Spirit does not publish a carry-on weight limit for paid carry-ons — practical limit is ability to lift into overhead bin

5. Spirit carry-on fee if purchased at booking: approximately $49 to $79 depending on route and timing

6. Spirit carry-on fee if paid at the gate: approximately $99 to $129

She passes size compliance on all three dimensions. However, Spirit's carry-on is not free — it must be purchased as an add-on. Buying it at booking is significantly cheaper than paying at the gate. Her 22-inch height measurement is right at the limit with wheels; if the bag compresses in overhead stowage and the gate agent measures it empty or deflated it may pass with margin, but she should not rely on that.

Example3:International Flight — Overweight Checked Bag on British Airways

An American traveler is flying British Airways economy from New York to London with a checked bag that measures 28 x 20 x 12 inches and weighs 54 pounds (24.5 kg).

1. Linear inches: 28 + 20 + 12 = 60 linear inches = 152.4 linear centimeters

2. British Airways economy checked bag limit: 90 x 75 x 43 cm (35.4 x 29.5 x 16.9 inches) and 23 kg (50.7 lbs)

3. Individual dimension check:

Height: 28 inches (71.1 cm) vs 90 cm allowed — PASS

Width: 20 inches (50.8 cm) vs 75 cm allowed — PASS

Depth: 12 inches (30.5 cm) vs 43 cm allowed — PASS

4. Size: PASS on all dimensions

5. Weight: 54 lbs = 24.5 kg vs 23 kg limit — FAIL by 1.5 kg (3.3 lbs)

6. British Airways excess weight fee: approximately £65 per kg over the limit on transatlantic routes (approximately $82 per kg)

7. Estimated overage fee: 1.5 kg x £65 = approximately £97.50 ($123)

He is 1.5 kg — just 3.3 lbs — over the limit and facing a $123 fee. Moving 3.3 lbs of contents into his carry-on (which he is allowed on BA economy) would bring the checked bag to exactly the limit and eliminate the fee entirely. The calculator identifies this before check-in, turning a $123 surprise into a zero-cost bag shuffle at home.

Example4:Personal Item Edge Case — Does My Backpack Fit Under the Seat

A traveler is flying United Airlines with only a personal item — a laptop backpack — to avoid paying any bag fees. The backpack measures 18 x 13 x 8 inches packed, including a full 15-inch laptop, chargers, a change of clothes, and toiletries.

1. Linear inches: 18 + 13 + 8 = 39 linear inches

2. United personal item limit: must fit under the seat in front of you. United's guideline is approximately 17 x 10 x 9 inches (though not strictly published as a hard rule for personal items)

3. Individual dimension check against 17 x 10 x 9 guideline:

Height: 18 inches vs approximately 17 — MARGINAL (1 inch over)

Width: 13 inches vs approximately 10 — OVER by 3 inches

Depth: 8 inches vs approximately 9 — PASS

4. Practical assessment: the under-seat space on most aircraft is approximately 18 x 14 x 8 inches, but varies by aircraft type and seat position. Window seats often have less under-seat space than middle or aisle seats.

5. Risk: United gate agents rarely measure personal items, but the bag may not physically fit under the seat, causing in-flight disruption

At 18 x 13 x 8, this backpack is too large for a strict personal item definition but may fit under the seat on larger aircraft. The safest course: remove the change of clothes, move toiletries to the laptop bag's outer pocket to reduce depth, and target 17 x 10 x 8 or smaller when fully packed. If the bag does not fit under the seat, it goes in the overhead bin, at which point the gate agent may charge the full carry-on fee on a budget itinerary.

Bag Calculator Results What the Numbers Mean

The linear inches result tells you whether your checked bag meets the industry-standard size limit. The weight result tells you whether you're under the limit and by how much. Together they answer the two questions that determine your fee at check-in.

Standard limits by bag type and airline category as of 2026:

Bag Type | US Full-Service Airlines | US Budget Carriers | European Full-Service | Middle East Carriers

Personal item | Under-seat, no published size | 14 x 18 x 8 to 18 x14 x 8 | Under-seat, ~40 x 30 x 15 cm | Under-seat varies

Carry-on (free) | 22 x 14 x 9 in, no wt limit | Usually paid add-on | 55 x 35 x 23 cm, 8-10 kg | 55 x 40 x 23 cm, 7 kg

Carry-on weight | No published limit (US) | 35 lbs (Frontier) or none | 7-12 kg depending on airline| 7-10 kg

Checked bag size| 62 linear inches | 62 linear inches | 158 linear cm (158 = 62 in)| 158 linear cm

Checked bag wt | 50 lbs (23 kg) economy | 40-50 lbs depending | 23 kg economy | 30-32 kg economy/business

Overweight fee | $75-$200 per bag per segment | $75-$150 per bag | £50-£100+ per segment | Varies widely

The most common misunderstanding is that the 62 linear inches limit is soft. It is not — every major US carrier enforces this at check-in using the airline's own measurement tools, and oversize fees at US airports run $200 per bag per segment on American, Delta, and United for bags exceeding 62 linear inches. A bag at 63 linear inches pays the same fee as a bag at 70 linear inches — the fee is flat, not per-inch.

The second most common misunderstanding is that carry-on weight limits don't exist in the US. They exist at several airlines — Frontier allows carry-ons up to 35 pounds, Spirit does not publish a specific limit but reserves the right to enforce one — and they exist on virtually all international carriers. European and Asian carriers routinely enforce 7 kg to 10 kg carry-on limits at the gate.

How Your Inputs Change the Result

Each dimension contributes equally to the linear inches total, but their individual limits matter for carry-on compliance. A bag that is 24 inches tall, 14 inches wide, and 8 inches deep has 46 linear inches — well under the 62-inch checked bag limit — but fails every US carrier's carry-on height standard of 22 inches maximum. Linear inches total is not sufficient to determine carry-on compliance; each dimension must be checked individually.

Dimension combo | Linear In | Carry-On Check (22x14x9) | Checked Bag Check (62 in)

20 x 14 x 8 in | 42 in | PASS all dimensions | PASS (20 in under limit)

22 x 14 x 9 in | 45 in | PASS (exactly at limit) | PASS (17 in under limit)

24 x 14 x 9 in | 47 in | FAIL (height 24 vs 22) | PASS (15 in under limit)

26 x 18 x 11 in | 55 in | FAIL (all dimensions) | PASS (7 in under limit)

28 x 20 x 14 in | 62 in | FAIL (all dimensions) | PASS (exactly at limit)

28 x 22 x 13 in | 63 in | FAIL (all dimensions) | FAIL (1 in over limit)

30 x 22 x 14 in | 66 in | FAIL | FAIL (4 in over, $200 fee)

Weight is the variable travelers most frequently misjudge because packed bags feel similar within a 5-pound range. A 48-pound bag and a 52-pound bag are indistinguishable by feel but represent the difference between a compliant bag and a $100 overweight fee. A $10 digital luggage scale at home eliminates that uncertainty entirely. Target 47 to 48 pounds maximum — 2 to 3 pounds under the limit — to account for calibration differences between home and airport scales.

Airline selection is the input that changes the result most dramatically for international travel. A 28 x 20 x 12 inch bag at 50 lbs is compliant on Delta domestic (62 linear inches, 50 lb limit) but is 1 kg over the British Airways international economy limit (23 kg = 50.7 lbs) and may be over the linear measurement limit on some Asian carriers that use a per-dimension rather than total linear inch standard. Always check the specific airline's policy for the specific route, not a general "standard."

Bag Calculator Common Mistakes to Avoid

- Measuring the bag empty rather than fully packed. An empty suitcase with a collapsed frame may measure 21 x 14 x 8 inches and pass every carry-on limit. The same bag fully packed with clothes, shoes, and toiletries may bulge to 22 x 14 x 10 inches and fail on depth. Always measure with the bag packed exactly as you plan to travel, with all zippers closed and all external pockets full.

- Not including wheels and handles in the height measurement. Every major airline includes wheels and the fully extended handle in carry-on and checked bag dimensions. A suitcase with a 2-inch wheel base and a 3-inch handle extension adds 5 inches to the measurement the airline actually takes. A bag marketed as a 20-inch carry-on may measure 23 to 24 inches with wheels and handle included.

- Assuming the same limits apply to connecting flights governed by different airlines. A codeshare or interline ticket may route you on three different carriers — each with its own baggage rules. The strictest airline on your itinerary governs the bags you check through. If your first leg is on a budget carrier with a 15 kg checked limit and your second is on a full-service airline with a 23 kg limit, your bag must meet the 15 kg limit for the entire journey.

- Weighing the bag on a bathroom scale without accounting for scale calibration. Home bathroom scales can read 1 to 3 pounds different from airport check-in scales due to calibration differences and surface type. A bag that reads 49.5 pounds at home on carpet may read 51 pounds on the airport's hard-surface scale. Target 2 to 3 pounds under the published limit — not right at it — to build in the calibration buffer.

- Buying the wrong size bag based on published liter volume alone. A bag marketed as 40 liters may have external dimensions that exceed carry-on limits if the manufacturer measured internal packing space without accounting for the frame, wheels, and handles. Always verify external dimensions in addition to stated volume, and measure the bag yourself if buying for carry-on use.

- Forgetting that liquids and electronics rules apply to carry-ons regardless of size compliance. A carry-on that passes size and weight checks can still be rejected at security if it contains liquids exceeding 3.4 oz (100 ml) per container in a single quart-sized bag (TSA 3-1-1 rule), or if electronics are not accessible for separate screening. Size compliance with the airline is a separate check from TSA security compliance.

- Not checking the fee structure before deciding to gate-check. When a carry-on does not fit in the overhead bin and must be gate-checked, airlines handle the fee differently. Southwest gate-checks for free. American and United may charge the standard checked bag fee if your fare does not include one. On budget carriers, a gate-checked carry-on may cost more than if you had checked it at the counter. Know the policy before boarding.

- Applying domestic US rules to international flights on the same ticket. US airlines typically allow two pieces of carry-on (one bag plus one personal item) on domestic flights with no published weight limit. The same airline's international flights — especially in partnerships with European or Asian carriers — often enforce a 7 kg to 10 kg carry-on weight limit that is never enforced on domestic segments. Travelers who pack to domestic standards for the outbound flight may face compliance issues on the international return.

Key Terms Explained

Linear Inches

The sum of a bag's three external dimensions — height plus width plus depth — used by airlines worldwide to enforce checked baggage size limits. The standard US economy class checked bag limit is 62 linear inches (158 linear centimeters).

Carry-On

A piece of luggage designed to fit in an aircraft's overhead storage bin, typically limited to 22 x 14 x 9 inches (55 x 35 x 23 cm) on most US full-service carriers. Must include wheels and handles in all dimension measurements.

Personal Item

A smaller bag that must fit under the seat in front of the passenger — typically a purse, laptop bag, small backpack, or tote. Most US carriers do not publish a specific size limit for personal items, though the practical constraint is the under-seat dimension of approximately 17 to 18 x 10 to 14 x 8 inches depending on aircraft type.

Overweight Fee

A flat surcharge charged by airlines when a checked bag exceeds the published weight limit. Most US carriers charge $100 per bag per segment for bags between 51 and 70 pounds, and $200 per bag per segment for bags between 71 and 100 pounds. Bags over 100 pounds are typically refused as checked baggage.

Oversize Fee

A flat surcharge for checked bags exceeding 62 linear inches (158 linear cm). Most US carriers charge $200 per bag per segment for oversized checked bags, regardless of how far over the limit the bag measures.

Gate Check

The process of placing a carry-on in the cargo hold at the boarding gate rather than in the overhead bin, either because the bin is full or the bag does not fit. Gate checking may be free (as on Southwest) or may incur the standard checked bag fee (as on American and United for basic economy fares).

TSA 3-1-1 Rule

The US Transportation Security Administration rule governing liquids in carry-on bags: containers must be 3.4 oz (100 ml) or smaller, all containers must fit in 1 quart-sized clear zip-top bag, and each passenger is allowed 1 such bag through security. A carry-on that complies with airline size rules must still comply with this rule to clear TSA screening.

Codeshare Flight

A flight operated by one airline but sold under another airline's flight number. Baggage rules on a codeshare flight are governed by the operating carrier — the airline actually flying the plane — not necessarily the marketing carrier whose code appears on the ticket. Always check which carrier operates each segment and apply that carrier's baggage rules.

How This Calculator Works Methodology

This bag calculator uses the formula: Linear Inches equals Height plus Width plus Depth (all in inches). For centimeter inputs, dimensions are converted using 1 inch equals 2.54 centimeters before linear inches is calculated, and both linear inches and linear centimeters are displayed in the result.

Volume in liters is estimated as Height (cm) multiplied by Width (cm) multiplied by Depth (cm) divided by 1,000. This is an approximation of packing volume based on external dimensions; actual internal packing capacity is lower due to frame, wheels, and shell thickness.

Weight conversions use the exact factors: 1 pound equals 0.453592 kilograms and 1 kilogram equals 2.20462 pounds, per the International Bureau of Weights and Measures.

Airline size and weight limits are sourced from each carrier's official baggage policy pages, current as of July 2026 per the sources listed below. Overage fee estimates reflect standard published fees for domestic economy class. Fee structures for elite status members, co-branded credit card holders, military personnel, and international routes may differ. This calculator is a planning tool — always verify current policy directly with your airline before travel, as baggage policies change frequently.

Frequently Asked Questions About Bag Calculator

1. How do I calculate linear inches for a checked bag?

Add the three dimensions of your bag — height plus width plus depth — all measured in inches with wheels and handles included at their largest points. For example: a bag measuring 28 inches tall (with wheels), 20 inches wide, and 14 inches deep has 28 + 20 + 14 = 62 linear inches. The standard checked bag limit at most US airlines is 62 linear inches. A bag at exactly 62 linear inches meets the limit; a bag at 63 linear inches incurs an oversize fee of up to $200 per segment.

2. How accurate is a bag calculator?

The linear inches and weight calculations are mathematically exact given your inputs. The accuracy of the result depends entirely on how precisely you measure your bag. Measure with the bag fully packed, zippers closed, all pockets full, and wheels extended — exactly as it will appear when the check-in agent measures it. Bags measured empty or with handles collapsed produce optimistically compliant results that may not hold at the airport.

3. What is the formula for bag linear inches?

Linear Inches equals Height plus Width plus Depth, all in inches. If dimensions are in centimeters, the equivalent formula is Linear Centimeters equals Height plus Width plus Depth, with 158 linear centimeters equaling 62 linear inches. To convert: linear inches multiplied by 2.54 equals linear centimeters. Always use the same unit system — inches or centimeters — throughout a single calculation.

4. Are carry-on bag limits the same in the US and internationally?

No — they differ significantly. Most US full-service carriers (Delta, United, American) allow carry-ons up to 22 x 14 x 9 inches with no published weight limit on domestic flights. European carriers (British Airways, Lufthansa, Air France) typically allow 55 x 35 x 23 cm (21.5 x 13.8 x 9 inches) and enforce a 7 to 12 kg weight limit. Middle Eastern carriers (Emirates, Qatar) allow 55 x 40 x 23 cm but strictly enforce a 7 kg weight limit. Budget carriers (Ryanair, EasyJet, Spirit, Frontier) have their own distinct policies that are often stricter and always subject to change.

5. When should I not use a bag calculator?

A bag calculator checks size and weight compliance against standard published limits. It does not account for airline policy changes that have not yet been reflected in the calculator's database, special items (musical instruments, sporting equipment, medical devices) that have separate rules, or airline-specific exceptions for elite status members. Always verify directly with your airline for specialty items, and check the airline's official baggage page within 24 hours of departure for any recent policy changes.

6. How do I get the most accurate weight reading for my bag?

Use a dedicated digital luggage scale rather than a bathroom scale for the most accurate reading. Digital luggage scales clip to the handle and show the weight as you lift the bag, eliminating the standing-on-a-scale calculation error. They cost $10 to $15 and read to within 0.2 pounds. If you only have a bathroom scale, weigh yourself in light clothing, then weigh yourself holding the bag — the difference is the bag's weight. Repeat twice and average the readings. Target 2 pounds under the published limit to buffer for airport scale calibration differences.

7. What is a typical checked bag size and weight for a week-long trip?

A week's worth of clothes for most travelers fits comfortably in a 24-inch to 26-inch checked suitcase (approximately 55 to 70 liters capacity) weighing 35 to 45 pounds packed for a summer trip or 40 to 48 pounds for a winter trip with heavier clothing. The standard 24-inch suitcase typically measures approximately 26 x 18 x 11 inches with wheels and handles — 55 linear inches, well within the 62-inch limit. A 26-inch suitcase typically measures 28 x 20 x 12 inches — 60 linear inches, also within the limit with 2 linear inches of margin.

8. Should I consult my airline directly before traveling with an oversized item?

Yes, for any item outside the standard personal item, carry-on, or checked bag categories. Musical instruments, sporting equipment (skis, golf clubs, surfboards, bicycles), camera equipment cases, car seats, strollers, medical equipment, and oversized art or fragile items all have separate policies that a standard bag calculator cannot address. Contact your airline's baggage services department at least 72 hours before departure for oversized or special items, and get written confirmation of the agreed handling policy before you arrive at the airport.

Related Calculators Worth Bookmarking

- Luggage Weight Converter — converts bag weight between pounds, kilograms, and grams instantly, useful when your airline publishes its limit in kilograms and your scale reads in pounds.

- Packing List Generator — builds a customized packing list based on trip length, destination climate, and activity type, helping you plan contents before calculating whether they fit in your bag.

- Travel Budget Calculator — estimates total trip costs including baggage fees, useful when deciding whether to check a bag or ship luggage in advance for a longer trip.

- Carry-On Size Checker — focuses specifically on carry-on dimension compliance across 120+ airlines, the specialized companion to this general bag calculator.

- Shipping vs Checking Calculator — compares the cost of shipping luggage via FedEx, UPS, or USPS against the checked bag fee for the same weight and destination, useful for extended trips or when bags are over the limit.

- Liquid Travel Size Calculator — checks whether your carry-on toiletries comply with TSA 3-1-1 liquid rules by volume, the regulatory complement to the bag size check.

- Trip Duration Packing Estimator — calculates how many days' worth of clothing, toiletries, and accessories fit in a given bag size based on your personal packing efficiency, bridging the gap between bag capacity and trip length.

- Airline Fee Calculator — estimates total ancillary fees for a flight including bag fees, seat selection, and food, giving a complete true cost comparison when booking between carriers with different base fares.

References and Further Reading

1. LEVEL8 Cases. What Are the Airline Restrictions for Luggage Size and Weight in 2026? LEVEL8, July 2026. level8cases.com.

2. Travel and Time. Airline Baggage Size and Weight Limits 2026. travelandtime.com, May 2026.

3. Skyscanner. Carry-on and Personal Item Size Restrictions. Skyscanner US, updated April 2026. skyscanner.com.

4. The Points Analyst. Checked Luggage Size Chart and Allowances 2025. thepointsanalyst.com, August 2025.

5. LYVOI. Suitcase Weight Chart 2026: Carry-On 7kg, Checked 23kg and Limits. lyvoi.com, November 2025.

6. American Airlines. Bag Limitations. aa.com, updated April 2026.

Important Disclaimer

This bag calculator is provided for informational and educational purposes only. Size and weight limit results are based on published airline policies as of July 2026 and are subject to change without notice. Airline baggage policies vary by route, fare class, frequent flyer status, and operating carrier on codeshare flights. This calculator provides planning estimates only and does not guarantee compliance at the airport. Always verify current baggage rules directly with your airline before travel. Overage fee estimates reflect standard published rates and may differ for international routes, partner airlines, or special circumstances. This tool does not constitute travel, legal, or financial advice.