1 kg = 1000 grams so 21 kg = 21000 grams. Simple!
21kg = 3stone 4.3lbs
21kg = 46lb 4.75oz
21kg converts to 46.3 lbs
21000 grams. The prefix "kilo" (symbol k) in the International System of Units (SI) and other systems, which denotes 103, it means one thousand. Therefore, there are 1,000 grams (g) in a kilogram (kg) and 0.001 kilogram equal a gram. Kilograms and grams are units of mass not volume such as liters, gallons, quarts, pints, and cups, and can only be conveted to each other if you have the specific item being measured, as each item has a different density.
Roughly 47 lbs. Type "21kg to pounds" in google search and google will show you the exact conersion. The formula to convert 21 kg to lbs is21 kg* 2.2046 lbs 1 kg = 46.29707506 lbs
21 Kg = 2100 grams to rise the temperature of this amount of water by 2 degrees Celsius you need 2*2100 = 4200 calories or 17572.8 Joules.
21 kg thats about 46 lbs
If something weighs 127kg on Earth it will weigh 21kg on the Moon.
8 grams is 1 Kasu