Pounds to Stones Conversion (lb to st)

Pounds to Stones Converter

Enter the weight in pounds below to convert it to stones.

Result in Stones:

1 lb = 0.071429 stones
1 lb = 1.000006 lb
1 lb = 1 lb 9.6000000002761E-5 oz

Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Pounds to Stones

To convert a measurement in pounds to a measurement in stones, divide the weight by the following conversion ratio: 14 pounds/stone.

Since one stone is equal to 14 pounds, you can use this simple formula to convert:

stones = pounds ÷ 14

The weight in stones is equal to the weight in pounds divided by 14.

For example, here's how to convert 5 pounds to stones using the formula above.

stones = (5 lb ÷ 14) = 0.357143 st

Pounds and stones are both units used to measure weight. Keep reading to learn more about each unit of measure.

What Is a Pound?

Pounds are a widely used unit of weight in the United States. The National Bureau of Standards approved the international definition of the pound for use in the United States in 1959 after an agreement between six nations referred to as the International Yard and Pound Agreement.^[1]

One pound is equal to 16 ounces, or 0.45359237 kilograms. In the avoirdupois or apothecaries' systems, one pound is equal to 7,000 grains.^[2]

The pound is a US customary and imperial unit of weight. A pound is sometimes also referred to as a common ounce. Pounds can be abbreviated as lb (plural lbs), and are also sometimes abbreviated as lb_m or #. For example, 1 pound can be written as 1 lb, 1 lb_m, or 1 #, and 2 pounds can be written as 2 lbs.

Learn more about pounds.

What Is a Stone?

One stone is equal to 14 pounds and is mostly used in the United Kingdom and Ireland as a unit of mass. It's most commonly used to measure personal body weight.^[3]

The stone is an imperial unit of weight. Stones can be abbreviated as st; for example, 1 stone can be written as 1 st.

Learn more about stones.

Pound to Stone Conversion Table

Table showing various pound measurements converted to stones.
Pounds	Stones
1 lb	0.071429 st
2 lb	0.142857 st
3 lb	0.214286 st
4 lb	0.285714 st
5 lb	0.357143 st
6 lb	0.428571 st
7 lb	0.5 st
8 lb	0.571429 st
9 lb	0.642857 st
10 lb	0.714286 st
11 lb	0.785714 st
12 lb	0.857143 st
13 lb	0.928571 st
14 lb	1 st
15 lb	1.0714 st
16 lb	1.1429 st
17 lb	1.2143 st
18 lb	1.2857 st
19 lb	1.3571 st
20 lb	1.4286 st
21 lb	1.5 st
22 lb	1.5714 st
23 lb	1.6429 st
24 lb	1.7143 st
25 lb	1.7857 st
26 lb	1.8571 st
27 lb	1.9286 st
28 lb	2 st
29 lb	2.0714 st
30 lb	2.1429 st
31 lb	2.2143 st
32 lb	2.2857 st
33 lb	2.3571 st
34 lb	2.4286 st
35 lb	2.5 st
36 lb	2.5714 st
37 lb	2.6429 st
38 lb	2.7143 st
39 lb	2.7857 st
40 lb	2.8571 st

Table showing various pound measurements converted to stones.

Pounds

Stones

1 lb

0.071429 st

2 lb

0.142857 st

3 lb

0.214286 st

4 lb

0.285714 st

5 lb

0.357143 st

6 lb

0.428571 st

7 lb

0.5 st

8 lb

0.571429 st

9 lb

0.642857 st

10 lb

0.714286 st

11 lb

0.785714 st

12 lb

0.857143 st

13 lb

0.928571 st

14 lb

1 st

15 lb

1.0714 st

16 lb

1.1429 st

17 lb

1.2143 st

18 lb

1.2857 st

19 lb

1.3571 st

20 lb

1.4286 st

21 lb

1.5 st

22 lb

1.5714 st

23 lb

1.6429 st

24 lb

1.7143 st

25 lb

1.7857 st

26 lb

1.8571 st

27 lb

1.9286 st

28 lb

2 st

29 lb

2.0714 st

30 lb

2.1429 st

31 lb

2.2143 st

32 lb

2.2857 st

33 lb

2.3571 st

34 lb

2.4286 st

35 lb

2.5 st

36 lb

2.5714 st

37 lb

2.6429 st

38 lb

2.7143 st

39 lb

2.7857 st

40 lb

2.8571 st

References

National Bureau of Standards, Refinement of Values for the Yard and Pound, U.S. Department of Commerce, July 1, 1959, https://www.nist.gov/system/files/documents/2017/05/09/frn-59-5442-1959.pdf
Encyclopædia Britannica, Avoirdupois weight, https://www.britannica.com/science/avoirdupois-weight
National Institute of Standards and Technology, Handbook 44 - 2012 - Appendix B, https://www.nist.gov/system/files/documents/2017/04/28/AppB-12-hb44-final.pdf