Weight Converter — Kilograms, Pounds, Grams, Ounces & More

1 kilogram = 2.20462 pounds. A quick mental shortcut: multiply kg by 2.2 and you'll be within 0.2% of the exact answer. So 70 kg ≈ 154 lbs, 80 kg ≈ 176 lbs.

Divide by 2.205. So 150 lbs ÷ 2.205 ≈ 68 kg. Or multiply by 0.4536. The tool does this for you instantly — just enter your weight in pounds and switch the output unit to kilograms.

1 stone = 14 pounds = about 6.35 kg. Stones are mainly used in the UK and Ireland for body weight. So "12 stone" means 168 lbs or roughly 76 kg. Outside the UK you'll rarely encounter this unit.

1 ounce = 28.35 grams. So 100g ≈ 3.5 oz, and 500g ≈ 17.6 oz. For cooking, a rough rule: 30g ≈ 1 oz. This is the avoirdupois ounce used in cooking and everyday life, not the troy ounce used for precious metals.

A metric ton (tonne) = 1,000 kg = 2,204 lbs. A US short ton = 2,000 lbs = 907 kg. A UK long ton = 2,240 lbs = 1,016 kg. The metric ton is the one used internationally in trade and science. When in doubt, ask which ton is meant.

Yes. US carriers (USPS, FedEx domestic) typically use pounds; international carriers and most of the rest of the world use kilograms. Just enter your package weight in one and read off the other.

The conversion factors are the same ones used by NIST, so yes — they're precise to several decimal places. For pharmaceutical or analytical work, the limiting factor is your measurement instrument, not this converter.