Convert Pounds to Stone
1 pound (lb) equals 0.07142857143 stone (st).
1 lb = 0.07142857143 st
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound to stone converter to paste a column from Excel.
How to Convert Pound to Stone
- 1 lb = 0.07142857143 st
- 1 st = 14 lb
- Example: convert 15 lb to st: 15 lb = 15 × 0.07142857143 st = 1.071428571 st
Reference conditions. lb: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). st: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
st = lb ÷ 14
Derivation from SI units:
- 1 lb = 0.45359237 kg (exact, 1959 international agreement)
- 1 st = 14 lb = 6.35029318 kg (exact)
- 1 lb = 0.45359237 kg ÷ 6.35029318 kg per st = 0.07142857142857 st
Both units are defined exactly, so the factor is exact. Pound definition: pound; Stone definition: stone.
Worked examples
- 160 lb is 11.42857143 st (11 st 6 lb).
160 lb × 0.07142857143 = 11.42857143 st - 200 lb is 14.28571429 st.
200 lb × 0.07142857143 = 14.28571429 st
Pound to Stone conversion table
| Pounds (lb) | Stone (st) |
|---|---|
| 0.25 lb | 0.01785714286 st |
| 0.5 lb | 0.03571428571 st |
| 1 lb | 0.07142857143 st |
| 2 lb | 0.1428571429 st |
| 3 lb | 0.2142857143 st |
| 5 lb | 0.3571428571 st |
| 10 lb | 0.7142857143 st |
| 15 lb | 1.071428571 st |
| 20 lb | 1.428571429 st |
| 25 lb | 1.785714286 st |
| 30 lb | 2.142857143 st |
| 40 lb | 2.857142857 st |
| 50 lb | 3.571428571 st |
| 100 lb | 7.142857143 st |
| 120 lb | 8.571428571 st |
| 130 lb | 9.285714286 st |
| 140 lb | 10 st |
| 150 lb | 10.71428571 st |
| 160 lb | 11.42857143 st |
| 170 lb | 12.14285714 st |
| 180 lb | 12.85714286 st |
| 200 lb | 14.28571429 st |
| 220 lb | 15.71428571 st |
| 250 lb | 17.85714286 st |
| 300 lb | 21.42857143 st |
Where it's used
Pound values are converted to stone and pounds for UK readers. Divide by 14; the remainder is pounds.
Pound to other weight and mass units
| Conversion | 1 lb equals |
|---|---|
| pound to kilogram | 0.45359237 kg |
| pound to gram | 453.59237 g |
| pound to milligram | 453592.37 mg |
| pound to microgram | 453592370 µg |
| pound to metric ton | 0.00045359237 t |
| pound to ounce | 16 oz |
| pound to stone | 0.07142857143 st |
| pound to short ton | 0.0005 ton (US) |
| pound to long ton | 0.0004464285714 ton (UK) |
| pound to grain | 7000 gr |
| pound to troy ounce | 14.58333333 oz t |
| pound to carat | 2267.96185 ct |
Frequently asked questions
How do I write 165 lb in stone?
165 ÷ 14 = 11 remainder 11, so 165 lb = 11 st 11 lb (11.79 st).
How many stone are in 1 pound?
1 lb = 0.07142857143 st.
How do I convert pounds to stone?
Multiply the value in lb by 0.07142857143, or divide it by 14. For example, 15 lb × 0.07142857143 = 1.071428571 st.
Is the lb to st conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound (avoirdupois) (lb)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, pound (avoirdupois).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pounds to Stone. Retrieved October 17, 2026, from https://scientificconverters.com/mass/pounds-to-stone/
IEEE
Scientific Converters, "Convert Pounds to Stone," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/pounds-to-stone/