Stone to Pounds Converter (st to lb)

A stone is exactly 14 pounds, a relationship that has not changed since the stone was standardized in Britain. Converting is therefore plain multiplication, and it comes up whenever a British or Irish weight has to be read by someone who thinks in pounds: an American doctor's form, a US fitness app or a fight report. Because 14 is an even number, half a stone is a clean 7 lb, which is why readings ending in .5 convert so neatly.

British boxing, horse racing and many bathroom scales give weights as stones plus pounds, while US forms expect a single number of pounds. To convert a weight like 11 st 6 lb, multiply the stones by 14 and add the pounds; the stones-and-pounds column in the first chart shows how decimal stone readings split.

How to use this tool

1. Type a value in the Stone box to see it in pounds, or type in the Pound box to convert the other way.
2. Press ⇄ to swap the two units, or Load example for a typical value.
3. Check the charts below for common values; for other units, open the Weight & Mass converter.

Formula

Pound (lb) = Stone (st) × 14

Stone (st) = Pound (lb) × 0.0714285714286

Both factors come from exact definitions: 1 pound = 0.0714285714286 stone and 1 stone = 14 pounds (shown to 12 significant digits).

Example

Two conversions worked with the same factors the converter uses:

10.5 st × 14 = 147 lb

168 lb × 0.0714285714286 = 12 st

Stone to Pound chart

Common values from stone to pounds, rounded to four decimal places.

Pound to Stone chart

The reverse direction for values people often look up.

Professional boxing weight limits in stone

Quick mental estimate

Multiply by 14 as ten times plus four times: 11 st → 110 + 44 = 154 lb. Add any loose pounds afterwards, so 11 st 6 lb comes to 154 + 6 = 160 lb. The method is exact.

Use the converter or the charts when the exact figure matters.

The two units

Stone (st): A stone is 14 pounds, exactly 6.35029318 kilograms. In the UK and Ireland body weight is still commonly given in stone and pounds, such as 11 st 4 lb.

Pound (lb): The avoirdupois pound has been defined since 1959 as exactly 0.45359237 kilograms and is divided into 16 ounces. It is the everyday unit of weight in the US.