Convert pounds (lb) to stone (st) instantly using our free online weight converter. Enter any weight in pounds to calculate its equivalent in decimal stones, with the conversion formula, step-by-step calculation, and a useful reference table.
1 pound ≈ 0.0714285714 stone
To convert pounds (lb) to stone (st), divide the weight in pounds by 14. For example, 140 lb ÷ 14 = 10 st.
One stone equals exactly 14 international avoirdupois pounds. Dividing by 14 gives the weight in decimal stones.
The factor of 14 is exact. Decimal results may be rounded for display.
Use the calculator above for whole-number and decimal pound measurements.
Common conversions useful for body-weight measurements. Decimal stone values are rounded to two decimal places.
| Pounds (lb) | Stone (st) |
|---|---|
| 1 lb | 0.07 st |
| 7 lb | 0.50 st |
| 14 lb | 1.00 st |
| 28 lb | 2.00 st |
| 42 lb | 3.00 st |
| 56 lb | 4.00 st |
| 70 lb | 5.00 st |
| 84 lb | 6.00 st |
| 98 lb | 7.00 st |
| 112 lb | 8.00 st |
| 126 lb | 9.00 st |
| 140 lb | 10.00 st |
| 150 lb | 10.71 st |
| 160 lb | 11.43 st |
| 168 lb | 12.00 st |
| 175 lb | 12.50 st |
| 180 lb | 12.86 st |
| 196 lb | 14.00 st |
| 200 lb | 14.29 st |
| 224 lb | 16.00 st |
| 250 lb | 17.86 st |
A pound is a unit of mass used for body weight, groceries, packaged goods, and shipping in the United States and other customary or imperial measurement contexts.
The standard symbol is lb; “lbs” is common informally.
A stone is a traditional British unit of mass used for body weight in the United Kingdom and Ireland.
For example, 11 stone equals 154 pounds. The symbol is st. Both pounds and stone measure mass; a stone is the larger unit and equals exactly 14 pounds.
UK body weights are often expressed as whole stones and remaining pounds, such as 11 st 5 lb rather than 11.3571 st.
The calculator shows this mixed-unit format beneath the decimal-stone result. Remaining pounds are rounded to two decimal places when needed.
These formats express the same mass in different ways:
12.5 st does not mean 12 stone 5 pounds. It means 12 stone plus half a stone, or 12 stone 7 pounds.
Remember a few multiples of 14:
For other weights, use the nearest lower multiple and keep the remainder in pounds. For example, 180 lb is 12 st 12 lb: 12 × 14 = 168, leaving 12 lb.
Explore more weight and mass conversion tools:
Conversion references: NIST Handbook 44, Appendix C documents the international pound definition. The UK Units of Measurement Regulations 1994 define one stone as 14 pounds.