If you've ever tried to balance a large checked bag on your bathroom scale at home to make sure you're under 50 pounds, you know it's not easy. And on your way back from vacation, after you've added a bunch of souvenirs to your suitcase? It's just a guessing game.
That is, unless you keep a tiny hanging luggage scale in your bag. Just attach the strap to your suitcase, lift, and see how much it weighs in either pounds or kilograms. It sure beats moving a bunch of underwear to your carry-on in the middle of the airport terminal to get your bag under the weight limit, and if it saves you from even one overweight baggage fee, it'll have paid for itself several times over.
This scale usually sells for around $10, but today on Amazon, you can get it for $8, with Prime shipping.
Etekcity Digital Hanging Luggage Scale | $8 | Normally $10