Free · Unit conversions

Stones, Pounds & Kilograms Mass Table

Convert stones into pounds and a selected metric or customary mass unit.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

One stone equals 14 avoirdupois pounds or exactly 6.35029318 kilograms. The additional mass field also offers grams, ounces, tonnes and compound units.

Pounds = stones × 14; kilograms = stones × 6.35029318

Worked example

Enter these known values and leave the other values blank.

Mass in stones
1 st
Mass in avoirdupois pounds
14 lb
Mass in selected unit
6.35 kg

Assumptions and limitations

  • The ordinary pound and ounce are avoirdupois units. The separately labeled troy ounce is a different mass. US short tons, imperial long tons and metric tonnes also differ.
  • The arithmetic can convert signed mass differences; enter a nonnegative value for an actual mass. This does not calculate force from gravity.

Common questions

Can I show stones and pounds together?

Yes. Select the compound stones/pounds unit in the additional mass field. Its components use colons rather than a decimal separator.

What is the difference between an ounce and a troy ounce?

An avoirdupois ounce is one sixteenth of an avoirdupois pound, or 28.349523125 grams. A troy ounce is 31.1034768 grams.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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