Pounds to Stone

1 lb = 0.07142857 st

Pounds to stone is used when a weight in pounds, from an American scale, fitness app, or medical chart, needs to be put into the stone-and-pounds format familiar in the UK and Ireland. It also helps British readers follow US diet and fitness content. Fourteen pounds make one stone.

From

When you need to convert pounds to stone

Turning a US bathroom scale reading into stone and pounds
Following American weight-loss content while tracking goals in stone
Expressing a newborn or pet weight in stone for UK relatives
Converting a boxing or wrestling weight class listed in pounds

How to convert pounds to stone

st = lb × 0.07142857

Equivalently: st = lb ÷ 14.

Example: 5 lb = 0.3571429 st

Common body weights in pounds

Pounds (lb)	Stone (st)
100 lb	7.142857 st
120 lb	8.571429 st
140 lb	10 st
150 lb	10.71429 st
160 lb	11.42857 st
180 lb	12.85714 st
200 lb	14.28571 st
220 lb	15.71429 st
250 lb	17.85714 st

Tips for converting pounds to stone

Divide by 14. The whole number is the stone and the remainder is the leftover pounds.
A decimal result such as 11.5 st means 11 st 7 lb, not 11 st 5 lb. Multiply the decimal part by 14.
Small weights under 14 lb are usually just stated in pounds in the UK rather than as a fraction of a stone.

Pounds to Stone conversion table

Pounds (lb)	Stone (st)
1 lb	0.07142857 st
2 lb	0.1428571 st
3 lb	0.2142857 st
4 lb	0.2857143 st
5 lb	0.3571429 st
6 lb	0.4285714 st
7 lb	0.5 st
8 lb	0.5714286 st
9 lb	0.6428571 st
10 lb	0.7142857 st
15 lb	1.071429 st
20 lb	1.428571 st
25 lb	1.785714 st
30 lb	2.142857 st
40 lb	2.857143 st
50 lb	3.571429 st
75 lb	5.357143 st
100 lb	7.142857 st
250 lb	17.85714 st
500 lb	35.71429 st
1,000 lb	71.42857 st

About the units

Pounds: The pound (avoirdupois) is a US customary and imperial unit of mass defined as exactly 0.45359237 kilograms.

Stone: The stone is a British unit of mass equal to 14 pounds, or about 6.35 kilograms, still used for body weight in the UK and Ireland.

Frequently asked questions

How many stone are in 1 pound?

1 pound equals 0.07142857 stone.

How many pounds are in 1 stone?

1 stone equals 14 pounds.

How do I convert pounds to stone?

Use the formula st = lb × 0.07142857. Equivalently, st = lb ÷ 14.

What is 10 pounds in stone?

10 pounds equals 0.7142857 stone.

Related conversions

Sources

Conversion factors use the exact definitions published by NIST and the BIPM, and are checked by automated tests against those definitions.

Last updated: October 17, 2026