How to Use a Luggage Scale (and Get an Accurate Reading)
A handheld luggage scale is simple, but a few small mistakes can throw the reading off by a pound or more. That's the difference between walking past the check-in desk and repacking on the floor. Here's how to get it right.
Before your first use
- Pull the battery tab. Many digital scales ship with a plastic tab in the battery slot so the battery doesn't drain in the box. travel inspira says its isolation tag must be removed before use. If the screen stays blank, check for one.
- Charge it. A rechargeable scale may arrive part-charged. Top it up before the trip.
- Pick your unit. Most digital scales switch between pounds and kilograms. Set it to the unit your airline uses, so you're not doing math at 5 a.m.
Step by step
- Turn the scale on with nothing hanging from it. Wait for it to show zero.
- Attach it to the bag. Use the hook on a normal suitcase handle. For a thick, padded or wide handle, loop the strap through the handle and clip it to the scale.
- Grip the scale handle. Some, like the KINGON, have a handle wide enough to hold with both hands, which helps with a heavy bag.
- Lift slowly. Raise the bag until it's fully off the ground. Don't jerk it up.
- Hold it still. Keep the bag steady until the scale beeps or the reading locks. KINGON says to hold still for about 5 seconds on a 50 lb bag.
- Set it down and read. A locking scale holds the number, so you don't have to strain to see the screen while lifting.
Why lifting slowly matters
When you yank a bag up fast, the extra force shows up as weight. Miami CarryOn warns that lifting fast can lock its dial at a heavier weight than the item really is. Digital scales can be thrown off the same way. Slow and steady gives you the real number.
Swinging is the other problem. If the bag is rocking, the reading keeps changing. Brace your elbow against your side and let the bag settle.
Weigh twice
Weigh the bag, set it down, and weigh it again. If the two numbers are close, you can trust them. If they're far apart, you probably lifted too fast or let the bag swing.
Use tare for bags and boxes
Tare resets the scale to zero with something already on it. Most digital scales have it. It's handy when you want the weight of what's inside a container, like a tote of souvenirs or a box you're shipping home. For a normal suitcase, just start from zero.
Leave a margin
Even a careful reading isn't perfect. Scales read in steps, from 0.05 lb on finer digital models to 0.2 lb on some others, and mechanical dials are rated within 1 to 2 percent of their maximum. The airline's scale may read a little differently too.
A simple rule: aim for a pound or two (about 0.5 to 1 kg) under the limit. If you're right at it, move a heavy item, like shoes or a book, to your carry-on.
Weigh again before the flight home
Bags almost always come back heavier. Pack the scale in your carry-on or an outside pocket so you can find it at the hotel. A rechargeable scale means a flat battery isn't a problem as long as you packed a cable.
When the reading looks wrong
- Blank or dim screen: low battery, or the battery tab is still in.
- Error or overload sign: the bag is heavier than the scale's maximum, or it was lifted too fast.
- Reading keeps changing: the bag is swinging. Hold it still longer.
- Won't zero: turn it off and on with nothing attached.
For five luggage scales compared on step size, strap, battery and reading lock, see our luggage scale for travel comparison.