"Weight" tells us how heavy something is (or how much it weighs). There are basically two systems in use in English-speaking countries.
The metric system is used in many countries of the world.
|1000 milligrams||1 gram||g||0.035 oz|
|1000 grams||1 kilogram||kg||2.21 lb|
|1000 kilograms||1 tonne||t||0.98 tons|
The British and US systems are the same except where shown.
|16 drams||1 ounce||oz||28.35 g|
|16 ounces||1 pound||lb||0.454 kg|
|14 pounds||1 stone||st||6.35 kg|
|British||8 stones||1 hundredweight||cwt||50.8 kg|
|20 hundredweight||1 ton||t||1,016 kg|
|US||100 pounds||1 (short) hundredweight||cwt||45.36 kg|
|2000 pounds||1 (short) ton||t||907.18 kg|