Mostly every airline is very strict with the weight of the luggage you can carry with you. You in fact might have faced the problem in the airport due to carrying extra load, and then ended up paying extra charge. If you want to free yourself from such hassles, get the Taylor #8120 Digital Luggage Scale.
All you need to do is clip the scale with your suitcase’s handle or lift your bag with the help of the handle shaped scale, and keep holding it unless you hear a beep sound. Now you will see the weight of the bag in the LCD of the scale. If you have more bags to weigh, you just need to push a button and it gets reset to zero.