Convert Stone to Long Tons
1 stone (st) equals 0.00625 long tons (ton (UK)).
1 st = 0.00625 ton (UK)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk stone to long ton converter to paste a column from Excel.
How to Convert Stone to Long Ton
- 1 st = 0.00625 ton (UK)
- 1 ton (UK) = 160 st
- Example: convert 15 st to ton (UK): 15 st = 15 × 0.00625 ton (UK) = 0.09375 ton (UK)
Reference conditions. st: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). ton (UK): Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
ton (UK) = st ÷ 160
Derivation from SI units:
- 1 st = 14 lb = 6.35029318 kg (exact)
- 1 long ton = 2240 lb = 1016.0469088 kg (exact)
- 1 st = 6.35029318 kg ÷ 1016.0469088 kg per ton (UK) = 0.00625 ton (UK)
Both units are defined exactly, so the factor is exact. Stone definition: stone; Long Ton definition: long ton.
Worked examples
- A reading of 10 st converts to 0.0625 ton (UK).
10 st × 0.00625 = 0.0625 ton (UK) - A value of 14 st is 0.0875 ton (UK).
14 st × 0.00625 = 0.0875 ton (UK)
Stone to Long Ton conversion table
| Stone (st) | Long Tons (ton (UK)) |
|---|---|
| 1 st | 0.00625 ton (UK) |
| 5 st | 0.03125 ton (UK) |
| 7 st | 0.04375 ton (UK) |
| 8 st | 0.05 ton (UK) |
| 9 st | 0.05625 ton (UK) |
| 10 st | 0.0625 ton (UK) |
| 10.5 st | 0.065625 ton (UK) |
| 11 st | 0.06875 ton (UK) |
| 12 st | 0.075 ton (UK) |
| 13 st | 0.08125 ton (UK) |
| 14 st | 0.0875 ton (UK) |
| 15 st | 0.09375 ton (UK) |
| 16 st | 0.1 ton (UK) |
| 18 st | 0.1125 ton (UK) |
| 20 st | 0.125 ton (UK) |
Where it's used
Stone are used for body weight in the UK and Ireland (e.g. 11 st 6 lb), while long tons appear in ship displacement and deadweight tonnage. Both measure mass (commonly called weight), so the conversion is a fixed factor.
Stone to other weight and mass units
| Conversion | 1 st equals |
|---|---|
| stone to kilogram | 6.35029318 kg |
| stone to gram | 6350.29318 g |
| stone to milligram | 6350293.18 mg |
| stone to microgram | 6350293180 µg |
| stone to metric ton | 0.00635029318 t |
| stone to pound | 14 lb |
| stone to ounce | 224 oz |
| stone to short ton | 0.007 ton (US) |
| stone to long ton | 0.00625 ton (UK) |
| stone to grain | 98000 gr |
| stone to troy ounce | 204.1666667 oz t |
| stone to carat | 31751.4659 ct |
Frequently asked questions
How many long tons are in 1 stone?
1 st = 0.00625 ton (UK).
How do I convert stone to long tons?
Multiply the value in st by 0.00625, or divide it by 160. For example, 15 st × 0.00625 = 0.09375 ton (UK).
Is the st to ton (UK) conversion exact?
Yes. Both units are defined exactly, and 1 st is exactly 0.00625 ton (UK).
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).
- 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, "ton, long (2240 lb)".
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 Stone to Long Tons. Retrieved October 17, 2026, from https://scientificconverters.com/mass/stone-to-long-tons/
IEEE
Scientific Converters, "Convert Stone to Long Tons," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/stone-to-long-tons/