About the Weight Converter
This weight converter turns any value into metric units (mg, g, kg, t), US/imperial units (ounce, pound, stone) and specialist units like the troy ounce and the carat. Type in either box: the conversion works both ways, so you can go from lbs to kg or kg to lbs without switching anything.
How to use
- Type a number in the top box and choose its unit.
- Pick the unit you want in the bottom box. The result appears instantly; typing in the bottom box converts backwards.
- Tap a popular conversion such as 150 lb or 1 troy oz to fill it in.
- Under All units, tap any value to copy it.
Weight conversion chart
| Unit | In grams | Notes |
|---|---|---|
| 1 pound (lb) | 453.59237 g | Exact by definition; 16 oz |
| 1 ounce (oz) | 28.349523 g | 1/16 lb |
| 1 stone (st) | 6.350293 kg | 14 lb, used for body weight in the UK |
| 1 troy ounce (oz t) | 31.103477 g | Gold, silver and other precious metals |
| 1 short ton (US) | 907.18474 kg | 2,000 lb |
| 1 metric ton (t) | 1,000 kg | About 2,204.6 lb |
| 1 carat (ct) | 0.2 g | Gemstones |
Quick formulas
kg = lb ร 0.45359237 and lb = kg ร 2.20462262. For a fast mental estimate, divide pounds by 2.2 to get kilograms, or double the kilograms and add 10%: 70 kg โ 140 + 14 = 154 lb.
FAQ
How many kg is 1 pound?
Exactly 0.45359237 kg, so about 0.454 kg. One kilogram is about 2.2046 pounds.
How many pounds is 70 kg?
70 kg รท 0.45359237 โ 154.3 lb.
What is the difference between an ounce and a troy ounce?
A regular (avoirdupois) ounce is 28.35 g and is used for food and everyday goods. A troy ounce is 31.10 g and is only used for precious metals; gold prices are quoted per troy ounce.
How many pounds are in a stone?
One stone is 14 pounds (6.35 kg). It is mainly used in the UK and Ireland for body weight, e.g. 11 st 4 lb = 158 lb.