Kg to Lbs Converter
Convert any mass between kilograms and pounds using the exact international definition: 1 lb = 0.45359237 kg. Switch to reverse mode to convert pounds back to kilograms. Results appear as decimal pounds, stones-and-pounds, total ounces, and grams.
Formula
Worked example
70 kg x 2.20462262 = 154.3236 lb. Divide by 14: 11 whole stones, remainder 0.3236 lb. Multiply by 16: 2,469.18 oz total. Reverse: 154 lb x 0.45359237 = 69.853 kg.
How to convert kilograms to pounds (and back)
To convert kilograms to pounds, multiply the number of kilograms by 2.20462262. For example, a 70-kilogram person weighs 70 times 2.20462262, which is 154.3236 pounds. For the reverse conversion from pounds to kilograms, multiply by 0.45359237 (or equivalently divide by 2.20462262). Both factors come from the same internationally agreed definition, so the math is perfectly invertible: converting 154.3236 lb back by multiplying by 0.45359237 returns exactly 70 kg.
Decimal pounds, stones-and-pounds, lb+oz, and grams
Depending on where you are in the world you may need the same mass in different formats. Decimal pounds (e.g. 154.32 lb) are standard in the United States. Stones-and-pounds (e.g. 11 st 0.3 lb) are common in the United Kingdom and Ireland for body weight, where one stone is exactly 14 pounds. The mixed pound-and-ounce format (e.g. 154 lb 5.2 oz) appears on US nutrition labels and produce scales, where one pound is 16 ounces. Grams (70,000 g for 70 kg) bridge to the rest of the metric system. This calculator displays all four formats from a single entry.
Why the factor is exactly 2.20462262
The kilogram is the SI base unit of mass and the pound is the US customary and imperial unit. Since the International Yard and Pound Agreement of 1959, one avoirdupois pound is defined as exactly 0.45359237 kilograms. Dividing 1 by 0.45359237 gives 2.2046226218488..., which rounds to 2.20462262 for nearly all practical purposes. Because the underlying definition is exact, any rounding error in a converted value comes only from the number of decimal places you keep in the factor, not from the underlying mathematics.
Quick mental conversion tricks
When a calculator is not available, a few tricks give close approximations fast. To estimate pounds from kilograms, double the kg and add 10 percent of the doubled value (e.g. 70 kg gives 140, plus 14, equals 154 lb, exact to within 0.2%). To go from pounds to kilograms, divide by 2 and subtract 10 percent of the halved value (e.g. 154 lb gives 77, minus 7.7, equals 69.3 kg). These tricks exploit the fact that 2.2 is close to 2, making the correction simple. For luggage allowances, a 23 kg bag is just over 50 lb and a 32 kg bag is just over 70 lb.
Mass versus weight
Strictly speaking the kilogram and the pound both measure mass, the amount of matter in an object, even though people loosely call the result a weight. Weight is technically the gravitational force on that mass and would differ on the Moon, whereas mass stays constant everywhere. On Earth the distinction rarely matters for bathroom scales or shipping, so converting kilograms to pounds with the 2.20462 factor always gives the number you expect. For scientific or engineering work, keep the mass-versus-weight distinction in mind and use newtons or pound-force for true weight.
Kilograms to pounds quick-reference chart
| kg | lb (decimal) | St and lb | lb + oz |
|---|---|---|---|
| 1 | 2.2046 | 0 st 2.2 lb | 2 lb 3.3 oz |
| 2 | 4.4092 | 0 st 4.4 lb | 4 lb 6.5 oz |
| 5 | 11.0231 | 0 st 11.0 lb | 11 lb 0.4 oz |
| 10 | 22.0462 | 1 st 8.0 lb | 22 lb 0.7 oz |
| 20 | 44.0925 | 3 st 2.1 lb | 44 lb 1.5 oz |
| 25 | 55.1156 | 3 st 13.1 lb | 55 lb 1.8 oz |
| 30 | 66.1387 | 4 st 10.1 lb | 66 lb 2.2 oz |
| 40 | 88.1849 | 6 st 4.2 lb | 88 lb 3.0 oz |
| 50 | 110.2311 | 7 st 12.2 lb | 110 lb 3.7 oz |
| 60 | 132.2773 | 9 st 6.3 lb | 132 lb 4.4 oz |
| 70 | 154.3236 | 11 st 0.3 lb | 154 lb 5.2 oz |
| 75 | 165.3467 | 11 st 11.3 lb | 165 lb 5.5 oz |
| 80 | 176.3698 | 12 st 8.4 lb | 176 lb 5.9 oz |
| 90 | 198.4160 | 14 st 2.4 lb | 198 lb 6.7 oz |
| 100 | 220.4623 | 15 st 10.5 lb | 220 lb 7.4 oz |
| 120 | 264.5547 | 18 st 12.6 lb | 264 lb 8.9 oz |
| 150 | 330.6934 | 23 st 8.7 lb | 330 lb 11.1 oz |
| 200 | 440.9245 | 31 st 6.9 lb | 440 lb 14.8 oz |
| 500 | 1102.3113 | 78 st 10.3 lb | 1102 lb 5.0 oz |
| 1000 | 2204.6226 | 157 st 6.6 lb | 2204 lb 10.0 oz |
Common body weights and everyday masses converted to pounds, stones-and-pounds, and mixed lb+oz. All values use the exact factor 1 kg = 2.20462262 lb.
Frequently asked questions
How many pounds are in a kilogram?
One kilogram equals 2.20462262 pounds. This comes from the exact international definition that one pound is 0.45359237 kilograms, so dividing 1 by 0.45359237 gives 2.20462262... pounds per kilogram.
How do I convert kg to stones and pounds?
Multiply kilograms by 2.20462262 to get total pounds. Divide that result by 14 to get whole stones, then keep the remainder as the leftover pounds. For example, 70 kg = 154.3236 lb = 11 stones and 0.32 lb.
How do I convert pounds back to kilograms?
Multiply the pounds by 0.45359237 (or divide by 2.20462262). For example, 154 lb times 0.45359237 = 69.85 kg. Use the reverse mode in this calculator to do it automatically.
Is 2.20462 an exact conversion factor?
It is a rounded value. The full factor is 2.2046226218488... pounds per kilogram, derived from the international definition that exactly 1 lb = 0.45359237 kg. Rounding to 2.20462 introduces an error of less than 0.0002%.
How do I convert kg to pounds and ounces (lb oz)?
First multiply kg by 2.20462262 to get decimal pounds. Take the whole number as the pound count. Multiply the decimal fraction by 16 to get the ounces. For example, 70 kg = 154.3236 lb, so the lb+oz format is 154 lb 5.2 oz.
What is 1 kg in grams and ounces?
One kilogram equals 1000 grams, 2.20462 pounds, or 35.274 ounces. Toggle "Show grams" in this calculator to also display the gram equivalent alongside pounds.