Kg to Lbs: Converting Kilograms to Pounds in Your Head
A kilogram is 2.20462 pounds. Double it and add ten percent — you will land within a quarter of a percent every time.
19 January 2026 · 5 min read · Weight
One kilogram equals 2.20462262 pounds. Like the inch, the pound is defined exactly in metric terms: one pound is 0.45359237 kilograms, agreed internationally in 1959.
The double-and-add-ten-percent trick
Because 2.2 is so close to the true 2.20462, this works remarkably well:
- Double the kilograms.
- Add 10% of that result.
For 70 kg: double is 140, ten percent of 140 is 14, total 154 lb. The true answer is 154.32 lb — an error of 0.2%.
Reference table
| Kilograms | Pounds | Stones & pounds |
|---|---|---|
| 5 kg | 11.02 lb | 0 st 11.0 lb |
| 25 kg | 55.12 lb | 3 st 13.1 lb |
| 50 kg | 110.23 lb | 7 st 12.2 lb |
| 70 kg | 154.32 lb | 11 st 0.3 lb |
| 100 kg | 220.46 lb | 15 st 10.5 lb |
Stones still matter
In the UK and Ireland body weight is usually spoken in stones, where 1 stone = 14 pounds = 6.35029 kg. "Eleven stone four" means 11 × 14 + 4 = 158 lb = 71.7 kg. Our stones to kilograms converter handles the arithmetic.
Three tons, three answers
This is where real money gets lost:
| Name | Also called | In kilograms |
|---|---|---|
| Metric ton | tonne | 1,000 kg |
| Short ton | US ton | 907.18 kg |
| Long ton | imperial ton | 1,016.05 kg |
A shipping quote in "tons" that does not say which one is ambiguous by up to 12%. If a contract matters, insist on tonnes or kilograms.
Troy ounces are not ounces
Gold, silver and platinum are priced per troy ounce (31.1035 g), which is about 10% heavier than the ordinary avoirdupois ounce (28.3495 g). A "10 oz" silver bar weighs 311 g, not 283 g. Use the troy ounces to grams converter for bullion.
Related conversions
This article is for general information. Please verify figures against the relevant standard before using them in critical work. About accuracy