Quick reference table
Common weight and mass conversions
| From | To |
|---|---|
| 1 lb | 0.45359237 kg |
| 1 kg | 2.204622622 lb |
| 1 oz | 28.34952312 g |
| 1 g | 0.03527396195 oz |
| 1 st | 6.35029318 kg |
| 1 kg | 0.1574730444 st |
| 1 ton (US) | 907.18474 kg |
| 1 t | 2,204.622622 lb |
How to convert weight and mass
Mass is measured in kilograms in the metric system and in pounds and ounces in the US customary and imperial systems. Everyday weighing, cooking, shipping and body weight all move between these units.
Every weight and mass unit is a fixed multiple of one base unit, the kg. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert lb to kg, multiply by 0.45359237. To go the other way, divide by 0.45359237.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Pounds to Kilograms
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 5 lb | 2.26796185 kg |
| 10 lb | 4.53592370 kg |
| 25 lb | 11.33980925 kg |
| 50 lb | 22.67961850 kg |
| 100 lb | 45.35923700 kg |
| 1,000 lb | 453.5923700 kg |
Kilograms to Pounds
| Kilograms (kg) | Pounds (lb) |
|---|---|
| 1 kg | 2.204622622 lb |
| 2 kg | 4.409245244 lb |
| 5 kg | 11.02311311 lb |
| 10 kg | 22.04622622 lb |
| 25 kg | 55.11556555 lb |
| 50 kg | 110.2311311 lb |
| 100 kg | 220.4622622 lb |
| 1,000 kg | 2,204.622622 lb |
Weight and mass units explained
| Unit | Symbol | Equals |
|---|---|---|
| Metric tons | t | 1 t = 1,000 kg |
| Kilograms | kg | 1 kg = 1 kg |
| Grams | g | 1 g = 0.001 kg |
| Milligrams | mg | 1 mg = 0.000001 kg |
| Micrograms | µg | 1 µg = 1 × 10⁻⁹ kg |
| Pounds | lb | 1 lb = 0.45359237 kg |
| Ounces | oz | 1 oz = 0.028349523125 kg |
| Stones | st | 1 st = 6.35029318 kg |
| US short tons | ton (US) | 1 ton (US) = 907.18474 kg |
| Long tons (UK) | ton (UK) | 1 ton (UK) = 1,016.0469088 kg |
| Quintals | q | 1 q = 100 kg |
| Carats | ct | 1 ct = 0.0002 kg |
| Grains | gr | 1 gr = 0.00006479891 kg |
| Troy ounces | oz t | 1 oz t = 0.0311034768 kg |
| Pennyweights | dwt | 1 dwt = 0.00155517384 kg |
| Slugs | slug | 1 slug = 14.5939029372 kg |
Popular conversions: kg to lbs, pounds to kg, ounces to grams, stone to kg.
Frequently asked questions
How many pounds are in a kilogram?
One kilogram is about 2.20462 pounds. To convert kilograms to pounds, multiply by 2.20462.
Is mass the same as weight?
In everyday use, yes. Strictly, mass is the amount of matter (measured in kg) and weight is the force of gravity on it (measured in newtons). On Earth, a mass of 1 kg weighs about 9.81 N.
How do I convert lb to kg?
Multiply the value in lb by 0.45359237 to get kg. For example, 10 lb = 4.53592370 kg.
How many kg is 1 lb?
1 lb = 0.45359237 kg, and 1 kg = 2.204622622 lb.
Does this weight and mass converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.