Stone to kg converter

• 1 stone = 14 pounds = 6.35029318 kg
• kg = stone × 6.35029318
• lb = stone × 14

Example: 12 stone is 12 × 14 = 168 lb, or 12 × 6.35 = 76.2 kg.

For a rough estimate, multiply stone by 6.35, or by 6 and add 6%: 12 st × 6 = 72, plus about 4 = 76 kg. The converter also lists grams, which is handy for baby weights in the UK, sometimes given as pounds and ounces but recorded in grams by hospitals.

In the UK and Ireland, body weight is usually given as stones plus pounds, like 11 st 6 lb. To convert by hand, turn everything into pounds first: 11 × 14 + 6 = 160 lb, then multiply by 0.45359237 to get 72.57 kg. The two boxes under the converter do this for you and show the total in pounds as well.

Don't write 11 st 6 lb as 11.6 stone. Six pounds is 6/14 of a stone, so 11 st 6 lb is 11.43 stone.

Stone is a traditional British unit. It's still the everyday way to talk about body weight in the UK and Ireland, and it shows up in British TV shows, fitness apps, boxing and horse racing. Bathroom scales sold in the UK often have a stone setting. Elsewhere, including the US, it isn't used, so if you read a British article saying someone lost 3 stone, that's 42 lb or 19 kg.

The stone has been 14 pounds for centuries, but historically the number of pounds varied by region and commodity. Today only the 14-pound stone is in use.

Weight-loss goals in British sources are often expressed in stone and pounds too: losing half a stone means losing 7 lb, or about 3.2 kg.

Swap the units to go the other way, or divide kilograms by 6.35. 80 kg ÷ 6.35 = 12.6 stone. To express the decimal as pounds, multiply the fractional part by 14: 0.6 × 14 = 8.4, so 80 kg is about 12 st 8 lb. For pounds and kilograms only, use the lbs to kg converter. Everything is calculated in your browser.