How to convert kg to lbs
- Type a weight in Kilograms (kg): the Pounds (lb) box and the Stones and pounds boxes update straight away.
- To convert lbs to kg, type in the pounds box; for a body weight given in stones, fill in stones and pounds.
- Set Decimal places if you need a fixed precision, and copy the result line with the copy button.
The formula: 1 lb = 0.45359237 kg exactly
The international avoirdupois pound has been defined as exactly 0.45359237 kilograms since 1959, so the conversion never changes:
- pounds = kg ÷ 0.45359237, which is the same as kg × 2.20462262…
- kg = pounds × 0.45359237
- 1 stone = 14 lb = 6.35029318 kg, and 1 lb = 16 ounces (oz)
Worked examples: 70 kg ÷ 0.45359237 = 154.32 lb, which is 11 st 0.3 lb. 200 lb × 0.45359237 = 90.72 kg. A newborn weighing 3.5 kg is 7.716 lb, or 7 lb 11.5 oz.
Converting kg to stones and pounds
In the UK and Ireland body weight is often given in stones and pounds. Convert to pounds first, then divide by 14: 80 kg = 176.37 lb; 176.37 ÷ 14 = 12 whole stones (168 lb) with 8.37 lb left, so 80 kg is 12 st 8.4 lb. To go back, multiply the stones by 14, add the pounds and multiply by 0.45359237: 12 st 8 lb = 176 lb = 79.83 kg.
Mental shortcuts
- kg to lbs: double it, then add a tenth of the result. 70 kg → 140 + 14 = 154 lb (exact: 154.3 lb).
- lbs to kg: halve it, then take away a tenth of the result. 150 lb → 75 − 7.5 = 67.5 kg (exact: 68.0 kg).
- Landmarks: 1 kg ≈ 2.2 lb, 5 kg ≈ 11 lb, 10 kg ≈ 22 lb, 100 kg ≈ 220 lb (15 st 10 lb).
Kilograms to pounds chart
| Kilograms | Pounds | Kilograms | Pounds |
|---|---|---|---|
| 0.5 kg | 1.102 lb | 1 kg | 2.205 lb |
| 2 kg | 4.409 lb | 3 kg | 6.614 lb |
| 4 kg | 8.818 lb | 5 kg | 11.023 lb |
| 10 kg | 22.046 lb | 15 kg | 33.069 lb |
| 20 kg | 44.092 lb | 25 kg | 55.116 lb |
| 30 kg | 66.139 lb | 40 kg | 88.185 lb |
| 50 kg | 110.231 lb | 60 kg | 132.277 lb |
| 70 kg | 154.324 lb | 75 kg | 165.347 lb |
| 80 kg | 176.37 lb | 90 kg | 198.416 lb |
| 100 kg | 220.462 lb | 150 kg | 330.693 lb |
Pounds to kilograms chart
| Pounds | Kilograms | Pounds | Kilograms |
|---|---|---|---|
| 1 lb | 0.454 kg | 2 lb | 0.907 kg |
| 5 lb | 2.268 kg | 10 lb | 4.536 kg |
| 20 lb | 9.072 kg | 25 lb | 11.34 kg |
| 50 lb | 22.68 kg | 100 lb | 45.359 kg |
| 110 lb | 49.895 kg | 120 lb | 54.431 kg |
| 130 lb | 58.967 kg | 140 lb | 63.503 kg |
| 150 lb | 68.039 kg | 160 lb | 72.575 kg |
| 170 lb | 77.111 kg | 180 lb | 81.647 kg |
| 190 lb | 86.183 kg | 200 lb | 90.718 kg |
| 220 lb | 99.79 kg | 250 lb | 113.398 kg |
Body weight chart: kg to stones and pounds
| Kilograms | Stones and pounds | Pounds |
|---|---|---|
| 45 kg | 7 st 1.2 lb | 99.2 lb |
| 50 kg | 7 st 12.2 lb | 110.2 lb |
| 55 kg | 8 st 9.3 lb | 121.3 lb |
| 60 kg | 9 st 6.3 lb | 132.3 lb |
| 65 kg | 10 st 3.3 lb | 143.3 lb |
| 70 kg | 11 st 0.3 lb | 154.3 lb |
| 75 kg | 11 st 11.3 lb | 165.3 lb |
| 80 kg | 12 st 8.4 lb | 176.4 lb |
| 85 kg | 13 st 5.4 lb | 187.4 lb |
| 90 kg | 14 st 2.4 lb | 198.4 lb |
| 95 kg | 14 st 13.4 lb | 209.4 lb |
| 100 kg | 15 st 10.5 lb | 220.5 lb |
| 110 kg | 17 st 4.5 lb | 242.5 lb |
| 120 kg | 18 st 12.6 lb | 264.6 lb |
Where you will meet kg and lbs
- Body weight: kilograms in most countries, pounds in the US, stones and pounds in the UK. Our BMI calculator and calorie calculator accept all three.
- Luggage: a common checked-bag limit of 23 kg is 50.7 lb, which is why many airlines quote it as 23 kg / 50 lb.
- Gyms: a standard 20 kg barbell is 44.1 lb, and a 45 lb plate is 20.4 kg, so plates from different systems are close but not equal.
- Cooking and babies: recipes and birth weights often use pounds and ounces; 1 oz is about 28.35 g.
Converting lengths or temperatures too? Use the cm to inches converter and the Celsius to Fahrenheit converter, or read the guide to metric and imperial conversions. All quick helpers are in everyday tools.
Frequently asked questions
How many pounds is 1 kg?
1 kg is 2.20462 pounds (1 ÷ 0.45359237). For everyday use, 2.2 lb is close enough.
How many kg is 1 lb?
Exactly 0.45359237 kg, or about 454 grams. The figure is the legal definition of the pound, not a rounded value.
How do I convert lbs to kg?
Multiply the pounds by 0.45359237. For example 150 lb × 0.45359237 = 68.04 kg. A quick estimate is to halve the number and take away a tenth: 75 − 7.5 = 67.5 kg.
How many stones is 70 kg?
70 kg is 154.32 lb. Divide by 14 and you get 11 stones with 0.32 lb left over, so about 11 st 0 lb.
Why is pound abbreviated lb?
It comes from the Latin "libra pondo", a Roman unit of weight. "lb" is the standard abbreviation for both one and several pounds; "lbs" is a common informal plural.
Is a kilo the same as a kilogram?
Yes. "Kilo" is the everyday short form of kilogram, the base unit of mass in the metric system, equal to 1,000 grams.
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