How heavy can a suitcase be before I pay extra?

It depends on the allowance printed on the ticket. On many full-service international economy fares the allowance is 23 kg per checked piece, and any weight above that attracts an overweight fee. Some fares set 20 kg, 25 kg or 30 kg instead. The per-airline pages carry the checked figures with the date they were verified.

What is the 32 kg limit and why does it exist?

32 kg (70 lb) is the maximum weight of any single piece under most ground-handling rules. It exists to protect baggage handlers from injury, not to generate revenue. Above 32 kg, most carriers refuse the bag at any price, and the passenger must repack into two pieces.

Is it cheaper to pay an overweight fee or to check a second bag?

Usually the second bag, when the overweight fee is charged per kilogram and the second-piece fee is flat. The comparison depends on the airline's published rates for the specific route and date. A worked comparison is shown above; the figures must be replaced with the airline's current fees.

Does the weight limit include wheels and handles?

Yes. The limit applies to the bag as presented at the check-in scale, including wheels, handles, tags and locks. A home scale is an estimate; the airport scale is the reference.

Why does the same ticket allow different baggage on different legs?

Because the piece concept and the weight concept can both apply to one itinerary. The piece concept allows a number of pieces each with a maximum weight; the weight concept allows a total mass that may be split across pieces. The operating carrier for each leg enforces its own handling rules, so a bag accepted at the origin may be weighed again at a transfer point.

Baggage Weight Limit Rules and Overweight Costs

A checked bag’s weight limit is not a single number. It is the lower of two figures: what the fare’s baggage allowance permits, and what the airport’s handling system will accept. The first is commercial and varies by airline, route, cabin and fare brand. The second is physical and is almost always 32 kg (70 lb) per piece. A bag above 32 kg is usually refused at check-in regardless of what the passenger offers to pay, because the limit exists to protect baggage handlers from musculoskeletal injury, not to generate revenue. That is why the two figures that dominate this subject are 23 kg and 32 kg, and why they behave differently.

The two tiers: 23 kg and 32 kg

23 kg (50 lb) is the standard weight allowance for a single checked piece in economy class on most full-service international carriers. It is a commercial figure set by the fare. 32 kg (70 lb) is the maximum weight any single piece may be, set by ground-handling safety rules and adopted almost universally. Between 23 kg and 32 kg, a bag is heavy but acceptable, and the airline charges an overweight fee. Above 32 kg, the bag is outside the handling limit and most carriers will not accept it at any price. The passenger’s remedy is to repack into two pieces, which converts one overweight bag into two compliant bags and usually costs less.

These figures are not universal. Some carriers set 20 kg, 25 kg or 30 kg as the allowance on particular routes or fare brands. The per-airline pages carry the checked figures with the date they were verified. The rule to carry away is that 23 kg is a fare condition and 32 kg is a handling condition, and they are enforced by different people for different reasons.

What the weight limit actually measures

The weight limit applies to the bag as presented at the check-in scale, including wheels, handles, tags and any locks. It does not apply to the passenger’s body weight, and it does not apply to the contents separately. A bag that weighs 22.8 kg at home can weigh 23.4 kg at the airport because of a different scale, a wet strap, or a souvenir added at the last stop. Airport scales are calibrated and are the reference; a home scale is an estimate. The practical consequence is that a bag within 0.5 kg of the limit is not within the limit.

Cabin baggage is measured differently. Cabin allowance is usually a piece count plus a size limit, and weight is either not stated or set at a figure the airline rarely weighs. The weight limit that generates fees is the checked-bag limit.

Piece concept and weight concept

A ticket’s baggage allowance is written under one of two systems.

Under the piece concept, the allowance is a number of pieces, each with its own maximum weight. A typical long-haul economy allowance is one piece at 23 kg. A second piece is a separate purchase, and each piece must be within the weight limit. Under the weight concept, the allowance is a total mass, such as 30 kg, which may be split across any number of pieces within the per-piece handling maximum. The weight concept is common on routes where the airline sells baggage by the kilogram.

The same ticket can mix the two. A journey with two legs may be ticketed under the piece concept on the long-haul segment and the weight concept on a regional segment, because the operating carriers use different systems. The allowance that applies at check-in is the one for the most significant carrier on the itinerary, but the operating carrier for each leg enforces its own handling rules. This is why the same bag can be accepted at the first airport and charged at the second.

Why overweight fees are steep

An overweight fee is priced to discourage the behaviour, not to recover a marginal cost. Moving one heavy piece requires the same handling as moving one light piece, so the airline’s additional cost is small. The fee is set high because a heavy bag consumes weight capacity that could be sold to another passenger or used for cargo, and because the airline wants the bag split before it reaches the ramp. The result is that the overweight fee is frequently higher than the fee for an additional piece. A passenger with one 30 kg bag on a 23 kg allowance often pays less by checking two bags of 15 kg each, paying a second-piece fee, than by paying the overweight fee on the single bag.

The arithmetic depends on the airline’s fee schedule, which changes by route and date. The per-airline pages carry the current figures. The structural point is stable: overweight fees are punitive by design, and splitting is usually cheaper.

Worked calculation: splitting one heavy bag

Suppose a passenger holds a ticket with a one-piece, 23 kg allowance. The checked bag weighs 30 kg. The airline’s overweight fee is charged per kilogram over the allowance, and the second-piece fee is a flat charge. The figures below are illustrative and must be replaced with the airline’s current published fees.

Step 1: Weight over the allowance
30 kg - 23 kg = 7 kg over

Step 2: Overweight fee (illustrative rate of 10 per kg)
7 kg x 10 = 70

Step 3: Split into two bags
Bag A: 15 kg
Bag B: 15 kg
Each is within the 23 kg limit, so no overweight fee applies.

Step 4: Second-piece fee (illustrative flat charge of 40)
Total for the split: 40

Step 5: Compare
Overweight on one bag: 70
Split into two bags: 40
Saving from splitting: 30

The calculation is repeated with the airline’s actual per-kilogram rate and second-piece fee. The structure holds whenever the overweight fee is charged per kilogram and the second-piece fee is flat, which is the common arrangement. If the overweight fee is a flat charge for any excess up to 32 kg, the comparison changes and the single heavy bag may be cheaper.

What people get wrong about baggage weight limits

The most common error is treating 23 kg as a physical limit. It is a fare condition. A passenger who repacks at the check-in desk to reach 23 kg has solved a commercial problem, not a safety one. The safety limit is 32 kg, and it is the one that cannot be negotiated.

The second error is assuming the allowance is the same on every leg. It is not, because the piece concept and the weight concept can both apply to one ticket, and because the operating carrier for each leg enforces its own handling rules. A bag accepted at the origin may be weighed again at a transfer point.

The third error is weighing the bag at home and treating that figure as final. Airport scales are the reference. A bag at 22.9 kg at home is not within a 23 kg limit until it has been weighed at the airport.

The fourth error is assuming an overweight fee can always be paid. Above 32 kg, most carriers refuse the piece. The passenger’s options are to repack, to leave items behind, or to ship the contents separately. This is not a revenue decision and cannot be waived at the desk.

These mistakes are natural because the two figures are printed together on the same ticket and look like one rule. They are two rules from two systems, and they fail in different ways.

The condition that changes the figure

Every figure in this subject is conditional. The table below sets out what each figure depends on. It does not carry airline-specific numbers, because those change by carrier, route and date and belong on the per-airline pages.

Figure	What it is	Condition that changes it	Who sets it
23 kg	Common economy allowance for one checked piece	Fare brand, cabin, route, airline	Airline, as a fare condition
20 kg, 25 kg, 30 kg	Alternative allowances on some fares and routes	Airline, route, fare brand, date checked	Airline, as a fare condition
32 kg	Maximum weight of any single piece	Handling regulations; rarely varied	Ground handler and airline safety rules
Overweight fee	Charge for a bag above the allowance	Airline, route, weight over, date checked	Airline, as a commercial charge
Second-piece fee	Charge for an additional bag	Airline, route, fare brand, date checked	Airline, as a commercial charge
Cabin weight limit	Weight limit for cabin baggage, if stated	Airline, cabin class, aircraft type	Airline, as a fare condition

When the weight limit is enforced

The weight limit is enforced at check-in, where the bag is weighed. It may be enforced again at a transfer point, at a gate for cabin baggage, or at a security checkpoint if the bag is re-screened. Enforcement is not uniform. A bag slightly over the limit may be accepted without comment on one occasion and charged on another. The rule is that the allowance is a condition of carriage, and the airline may apply it at any point where the bag is presented.

For cabin baggage, enforcement is usually by size rather than weight. The sizer at the gate is the reference, and a bag that does not fit the sizer may be checked, with the checked-bag allowance then applying. This is how a cabin bag becomes a checked bag and acquires a weight limit it did not previously have.

What to do before check-in

Weigh the bag on a scale that reads to 0.1 kg, and treat the reading as an estimate. Compare it with the allowance for the specific ticket, not with a general figure. If the bag is over the allowance but under 32 kg, compare the overweight fee with the second-piece fee using the airline’s published rates. If the bag is over 32 kg, repack before reaching the airport, because the piece will be refused. The per-airline pages carry the checked figures and the date they were verified.

A note on weight figures and health

This page deals with baggage, not body weight. Where any page carries intake or weight figures relating to people, it is not medical advice, and readers concerned about disordered eating should contact a named helpline such as the National Eating Disorders Association (NEDA) Helpline in the United States, or the equivalent national service in their country.

Baggage Weight Limits: 23 kg, 32 kg, and Overweight Fees