The bathroom-scale method
- Weigh yourself.
- Weigh yourself again while holding the bag.
- Subtract the first reading from the second.
Treat the result as an approximation. A household scale was not designed for this job, and rounding on either reading compounds in the subtraction. Use the same scale for both readings. The method is usually enough when you are comfortably under a limit and gets shakier the closer you are to one. Only lift or hold a bag you can manage safely. If it is heavy or awkward, or you are unsure, ask for help or use a different method.
Other options to consider first:
- A household scale you already own, used before you leave.
- Borrowing a luggage scale from someone who has one.
- A hotel or accommodation scale, but only if you have confirmed one is available. Whether accommodation generally provides one is not established, so don’t plan around it.
Find the number that applies
A scale only matters if a weight limit applies. Look up three numbers for your own fare and route:
- The cabin bag limit, if there is one.
- The personal item limit, if there is one.
- The checked bag limit.
These vary widely and not along simple lines like domestic versus international. The examples below are illustrations from airlines’ published policies, not a market survey. Check your own airline’s current page.
Swipe horizontally to compare all columns. Keyboard: focus the table and use the arrow keys.
| Airline | What the published policy says |
|---|---|
| American Airlines | Carry-on size limits, with no numerical weight cap stated on the cited carry-on policy page; check the actual fare and route |
| easyJet | Small or large cabin bag up to 15 kg; the passenger must be able to lift and carry it themselves |
| Ryanair | A second, larger cabin bag up to 10 kg under the paid Priority option; check current ticket conditions |
| IndiGo | One hand bag up to 7 kg plus a personal article up to 3 kg, subject to flight-specific and codeshare conditions |
If no numerical limit applies to the bag you are carrying, or you are comfortably under it, the case for a scale is much weaker.
Sources for this section: easyJet cabin bags (opens in a new tab); American Airlines carry-on baggage (opens in a new tab); Ryanair bag policy (opens in a new tab); IndiGo baggage allowance (opens in a new tab).
Leave a margin
The simplest substitute for precision is room. Packing deliberately below your allowance means the exact number matters less. Decide your margin before you pack, not at the airport. A bag packed right to the limit leaves no space for anything you pick up on the way.
The return-trip problem
The outbound leg is usually the easy half. A bathroom scale at home can settle it before you leave. The return leg is different. Souvenirs and redistributed items can push a bag nearer, or over, a limit that was no concern a week earlier, and you may have no equivalent scale where you are.
If your itinerary depends on knowing the return weight in advance, build that into the decision now. That could mean a larger margin on the way out, or carrying a scale. Don’t assume it will sort itself out at check-in.
When a scale earns its place
- A bag is being checked against a meaningful weight allowance.
- A cabin bag has a published numerical weight limit that matters on your route.
- Your itinerary is multi-airline, with different rules on each leg.
- You tend to pack close to the limit.
- You expect the contents to change during the trip.
When you can probably skip it
If volume rather than weight is your real problem, how to stop overpacking is the better starting point.
- Every bag is comfortably under its allowance.
- No numerical weight cap applies to the bag you are carrying.
- You rarely check bags, or weight is simply not a recurring problem.
- A method you already have gives you enough confidence.
This is not a geography question. Someone on a route with no meaningful limit has no more reason to own a scale than anyone else in the same position.
If you buy one
A scale does not prevent excess-baggage charges. It reduces uncertainty before you reach the airline’s own weighing point. Compare listings on:
- Capacity against your allowance. Check it comfortably covers the heaviest limit you face.
- Graduation and accuracy, which are different things. Graduation is the smallest step the display shows. Accuracy is how close the reading is to the true weight. A fine graduation does not show that a scale is accurate.
- A hold function, useful on some digital models for reading the number once the bag stops swinging.
- Power: battery, none, or a dynamo button.
- Weight and packed size. These vary by product, so don’t assume a scale is negligible.
- Lifting, safely. A handheld scale means lifting the loaded bag clear of the ground. Lift smoothly, hold the bag close to your body, and use a handle or strap that can take the load. If the bag is heavy or awkward, or you are unsure you can lift it safely, ask someone able to help safely, or use an appropriate platform scale.
What one published test showed: Reviewed’s page, displaying an update date of 12 June 2023, describes testing ten luggage scales against baseline weights, using three types of luggage and test loads at roughly 25, 50 and 75 lb. Most of the digital scales read close to baseline. One digital model was eliminated for inaccurate readings. The mechanical entry was less accurate than most digital entries in that set. That belongs to one test of specific models. It does not show that all digital scales are accurate or that mechanical scales are less reliable as a category.
Beurer’s manufacturer specification for its LS 20 Eco, a battery-free model with a dynamo-power button, lists 94 g excluding packaging, a 50 kg capacity and 10 g graduation. These are examples of what to read, not recommendations. The Beurer figures are manufacturer specifications. The 10 g graduation describes the display’s step size, not how accurate the scale is.
Sources for this section: Reviewed luggage scale test page updated 12 June 2023 (opens in a new tab); Beurer LS20 Eco specifications and 2025 catalogue (opens in a new tab); Beurer LS20 Eco specifications and 2025 catalogue (opens in a new tab).
If the airport scale disagrees with yours
Ireland’s National Standards Authority has advised travellers to check that a baggage scale reads zero and ask staff about using another scale if a reading seems wrong. Its cited advisory is historical; it is not evidence of current inspection coverage at every airport.
Your own scale gives you a second reference point. It does not settle a dispute. If the two readings disagree, that tells you two scales disagree, not which is right.
This guide is research-based and does not report hands-on testing of the products discussed. Airline allowances change; check yours for your fare and route.
Sources for this section: NSAI historical baggage scale advisory (opens in a new tab).