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Stone Converters

Convert stones to pounds, kilograms, ounces, grams, milligrams and metric tons, and back again.

What this tool does

Convert stones to pounds, kilograms, ounces, grams, milligrams and metric tons, and back again. Type an amount in stone, choose the units, and the tool converts it to pounds (avoirdupois). It offers 7 mass units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Stone, Pound (avoirdupois), Kilogram, Ounce (avoirdupois), Gram, Milligram, Tonne (metric ton). Starts as Stone.
  • To: Choose one of the same 7 units as "From". Starts as Pound (avoirdupois).

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from stone to pounds (avoirdupois):

  • 1 st = 14 lb
  • 5 st = 70 lb
  • 10 st = 140 lb
  • 50 st = 700 lb
  • 100 st = 1,400 lb

Multiply the number of stone by 14 to get pounds (avoirdupois). Both units are exact definitions, so 14 is the exact factor: 1 st = 14 lb.

Sources: Stone: exact by definition. Pound (avoirdupois): International yard and pound agreement, 1959.

Limitations

  • Converts mass units only. It does not convert between mass and volume or energy, which needs a density or other second value.
  • Shows decimal stones only, not a stone-and-pounds split.

FAQs

Q: How many pounds are in a stone?
A: One stone is 14 pounds.
Q: How many kilograms is a stone?
A: One stone is 6.35029318 kilograms, about 6.35 kg.
Q: Can it show stone and pounds together?
A: It shows a single decimal number of stone, such as 11.5, rather than a split such as 11 stone 7 pounds.

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