Calcylator
Stone to Pounds

Stone to pounds:
multiply by 14

Convert stone to pounds, including weights written as stone plus pounds, with a chart and clear examples.

Calcylator Editorial Team

Updated · 5 min read

How many pounds are in a stone?

One stone is exactly 14 pounds. This is a fixed count rather than a decimal factor, so 2 stone is 28 lb, 10 stone is 140 lb and 12 stone is 168 lb. There is no rounding anywhere in the conversion.

The stone is mostly a British and Irish unit for human body weight. People say they weigh 'eleven stone four', meaning 11 stone and 4 pounds, which is why stone-to-pound conversions usually involve two numbers instead of one.

The stone to pounds formula

Stone to pounds =lb = (stone × 14) + extra pounds
lb:
weight in pounds
stone:
whole stone
14:
pounds in one stone (exact)
extra pounds:
the pounds part of a stone-and-pounds weight, if any
To go the other way, divide pounds by 14: the quotient is the stone and the remainder is the extra pounds.

  • Weight

    9 st 7 lb

  • Stone part

    9 × 14 = 126 lb

  • Add the pounds

    126 + 7

Weight in pounds

133 lb

133 lb is also about 60.3 kg.

  1. Multiply the whole stone by 14.
  2. Add the extra pounds, if any.
  3. If you started from a decimal stone such as 10.5, just multiply the whole figure by 14.

Chart: stone to pounds

Stone to pounds
Stone (st)Pounds (lb)
114
228
570
10140
25350
50700
1001,400
2503,500
5007,000
1,00014,000

Half a stone is 7 pounds, so 8 and a half stone is 119 lb. The chart is exact at every row.

Real uses: body weight, babies and weigh-ins

Fitness apps, boxing weigh-ins and doctors' records in the UK may record weight in stone while a calculator or recipe needs pounds or kilograms. A weight of 12 st 3 lb is 12 × 14 + 3 = 171 lb, which is about 77.6 kg.

Moving the other way, 10.5 stone is 147 lb, or about 66.7 kg. These conversions describe the number only; whether a weight is right for you is a question for a health professional, not a calculator.

More examples: building a chart of your own

Because the factor is a whole number, you can extend the chart in your head. 8 st 12 lb is 8 × 14 + 12 = 124 lb, which is about 56.2 kg. 14 stone is 196 lb, and 11 st 4 lb is 158 lb or about 71.7 kg.

The other direction needs a division. To get stone from pounds, divide by 14 and keep the remainder as the pounds. For 224 lb that is exactly 16 stone, and for 100 lb it is 7 stone 2 pounds. If you ever get a remainder of 14 or more, you have not divided fully.

When you read a weight aloud, the pounds part is always below 14. A figure such as 10 stone 16 pounds is a slip, and should be restated as 11 stone 2 pounds. If your own calculation returns 14 or more pounds, carry one into the stone column.

Common mistakes when converting stone to pounds

  • Using 10 or 16 pounds per stone. A stone is 14 pounds.
  • Reading '9 st 7' as 9.7 stone. The 7 is pounds, so the decimal stone is 9.5, not 9.7.
  • Forgetting to add the leftover pounds after multiplying the stone.
  • Mixing up the UK stone with US customary weights, which do not use stone in everyday life.

Common questions

How many pounds are in 1 stone?

One stone is exactly 14 pounds. It is a fixed definition, so 5 stone is 70 lb and 10 stone is 140 lb. In kilograms, one stone is 6.35029318 kg, because a pound is exactly 0.45359237 kg.

How do I convert stone to pounds?

Multiply the stone by 14, then add any extra pounds. For example, 9 stone 7 pounds is 9 × 14 = 126, plus 7, which gives 133 lb. A decimal such as 10.5 stone is simply 10.5 × 14 = 147 lb.

How many pounds is 12 stone?

Twelve stone is 168 pounds, because 12 × 14 = 168. If the weight is 12 stone 3 pounds, add the 3 to get 171 lb. In kilograms, 12 stone is 76.2035182 kg.

How many pounds is half a stone?

Half a stone is 7 pounds, since a whole stone is 14 pounds. So 8.5 stone is 119 pounds and 0.25 of a stone is 3.5 pounds. Divide the pounds by 14 to check the stone figure.

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