Pounds to Stones Converter
1 pound is about 0.0714286 stones. To convert pounds to stones, divide by 14.
Sources: NIST SP 811, NIST Handbook 44, UK Weights and Measures Act 1985 Updated
Result
150 lb = 10.7143 st
= 10 st 10 lb
How to convert pounds to stones
stones = pounds ÷ 14
1 pound is exactly 0.45359237 kilogram. 1 stone is 14 pounds, exactly 6.35029318 kilograms.
Dividing by 14 is exact. Written as a multiplication the factor is a repeating decimal, 1 lb = 0.07142857142857… st, so a rounded multiplier such as 0.07143 is slightly off. This converter keeps the exact fraction (1/14) and rounds only the result it shows.
Worked example: 170 lb
- Start with the value in pounds: 170 lb.
- Divide by 14, because 1 stone = 14 pounds: 170 ÷ 14 = 12.14285714….
- Round to the precision you need: 12.14 st to two decimals.
- In stones and pounds: 12 st 2 lb.
Pounds and stones side by side
Pounds to stones chart
Pounds from 100 to 250 converted to stones with the exact factor, shown to five significant digits.
| lb | st | st + lb |
|---|---|---|
| 100 | 7.1429 | 7 st 2 lb |
| 102 | 7.2857 | 7 st 4 lb |
| 104 | 7.4286 | 7 st 6 lb |
| 106 | 7.5714 | 7 st 8 lb |
| 108 | 7.7143 | 7 st 10 lb |
| 110 | 7.8571 | 7 st 12 lb |
| 112 | 8 | 8 st 0 lb |
| 114 | 8.1429 | 8 st 2 lb |
| 116 | 8.2857 | 8 st 4 lb |
| 118 | 8.4286 | 8 st 6 lb |
| 120 | 8.5714 | 8 st 8 lb |
| 122 | 8.7143 | 8 st 10 lb |
| 124 | 8.8571 | 8 st 12 lb |
| 126 | 9 | 9 st 0 lb |
| 128 | 9.1429 | 9 st 2 lb |
| 130 | 9.2857 | 9 st 4 lb |
| 132 | 9.4286 | 9 st 6 lb |
| 134 | 9.5714 | 9 st 8 lb |
| 136 | 9.7143 | 9 st 10 lb |
| lb | st | st + lb |
|---|---|---|
| 138 | 9.8571 | 9 st 12 lb |
| 140 | 10 | 10 st 0 lb |
| 142 | 10.143 | 10 st 2 lb |
| 144 | 10.286 | 10 st 4 lb |
| 146 | 10.429 | 10 st 6 lb |
| 148 | 10.571 | 10 st 8 lb |
| 150 | 10.714 | 10 st 10 lb |
| 152 | 10.857 | 10 st 12 lb |
| 154 | 11 | 11 st 0 lb |
| 156 | 11.143 | 11 st 2 lb |
| 158 | 11.286 | 11 st 4 lb |
| 160 | 11.429 | 11 st 6 lb |
| 162 | 11.571 | 11 st 8 lb |
| 164 | 11.714 | 11 st 10 lb |
| 166 | 11.857 | 11 st 12 lb |
| 168 | 12 | 12 st 0 lb |
| 170 | 12.143 | 12 st 2 lb |
| 172 | 12.286 | 12 st 4 lb |
| 174 | 12.429 | 12 st 6 lb |
| lb | st | st + lb |
|---|---|---|
| 176 | 12.571 | 12 st 8 lb |
| 178 | 12.714 | 12 st 10 lb |
| 180 | 12.857 | 12 st 12 lb |
| 182 | 13 | 13 st 0 lb |
| 184 | 13.143 | 13 st 2 lb |
| 186 | 13.286 | 13 st 4 lb |
| 188 | 13.429 | 13 st 6 lb |
| 190 | 13.571 | 13 st 8 lb |
| 192 | 13.714 | 13 st 10 lb |
| 194 | 13.857 | 13 st 12 lb |
| 196 | 14 | 14 st 0 lb |
| 198 | 14.143 | 14 st 2 lb |
| 200 | 14.286 | 14 st 4 lb |
| 202 | 14.429 | 14 st 6 lb |
| 204 | 14.571 | 14 st 8 lb |
| 206 | 14.714 | 14 st 10 lb |
| 208 | 14.857 | 14 st 12 lb |
| 210 | 15 | 15 st 0 lb |
| 212 | 15.143 | 15 st 2 lb |
| lb | st | st + lb |
|---|---|---|
| 214 | 15.286 | 15 st 4 lb |
| 216 | 15.429 | 15 st 6 lb |
| 218 | 15.571 | 15 st 8 lb |
| 220 | 15.714 | 15 st 10 lb |
| 222 | 15.857 | 15 st 12 lb |
| 224 | 16 | 16 st 0 lb |
| 226 | 16.143 | 16 st 2 lb |
| 228 | 16.286 | 16 st 4 lb |
| 230 | 16.429 | 16 st 6 lb |
| 232 | 16.571 | 16 st 8 lb |
| 234 | 16.714 | 16 st 10 lb |
| 236 | 16.857 | 16 st 12 lb |
| 238 | 17 | 17 st 0 lb |
| 240 | 17.143 | 17 st 2 lb |
| 242 | 17.286 | 17 st 4 lb |
| 244 | 17.429 | 17 st 6 lb |
| 246 | 17.571 | 17 st 8 lb |
| 248 | 17.714 | 17 st 10 lb |
| 250 | 17.857 | 17 st 12 lb |
stones = pounds ÷ 14. Factors: NIST SP 811, NIST Handbook 44, UK Weights and Measures Act 1985. unitcheck.net/weight/pounds-to-stones/
Common values
| Pounds | Stones | What it is |
|---|---|---|
| 14 lb | 1 st | exactly 1 stone |
| 140 lb | 10 st | |
| 154 lb | 11 st | |
| 170 lb | 12.1429 st | |
| 200 lb | 14.2857 st |
Going the other way? Use the Stones to Pounds converter.
Frequently asked questions
How many stones are in 1 pound?
1 pound is about 0.0714286 stones. 1 pound is exactly 0.45359237 kilogram.
How do I convert pounds to stones?
Divide by 14: stones = pounds ÷ 14. For example, 170 lb = 12.14 st.
How many pounds are in 1 stone?
1 stone is exactly 14 pounds. To go the other way, use the stones to pounds converter.
Is the lb to st conversion exact?
The relationship is exact (1 st = 14 lb), but 1 ÷ 14 is a repeating decimal, 0.07142857143…. The converter works with the exact fraction and rounds only the displayed result, so it does not pick up the small error a rounded multiplier would cause.
How do I read the result in stones and pounds?
The line under the result splits it for you: the whole stones stay as they are and the decimal part is converted to pounds. For example, 170 lb is 12 st 2 lb.
Sources
- NIST Special Publication 811, Guide for the Use of the International System of Units, Appendix B.8: Factors for Units Listed Alphabetically — exact factors are printed in bold in the NIST table (checked October 12, 2026)
- NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement — US customary units and their exact relationships (checked October 12, 2026)
- Weights and Measures Act 1985 (UK), Schedule 1: Definitions of Units of Measurement — imperial gallon, pint and fluid ounce, stone and long ton (checked October 12, 2026)