Convert Stones to Solar Masses
Convert Stones (st) to Solar Masses (M☉) instantly and accurately.
Conversion Formula
M☉ = st × 3.192834895e-30
About Stones
A stone (st) equals 14 pounds or approximately 6.350 kg. It is the standard unit for expressing human body weight in the United Kingdom and Ireland, where a person will say they weigh '11 stone 4' (meaning 11 stone and 4 pounds, or 158 lb / 71.7 kg). Despite the UK's official adoption of the metric system, stones remain the dominant unit for personal body weight on British bathroom scales, in doctors' offices, and in everyday conversation. British newspapers and sports reports routinely describe athletes' weights in stones and pounds.
About Solar Masses
A solar mass (M☉) is the mass of our Sun - approximately 1.989 × 10³⁰ kg - and is the standard unit for measuring stellar and galactic masses in astronomy. The Sun contains 99.86% of the total mass of the Solar System. Stellar evolution models describe stars of 0.08 M☉ (the minimum for hydrogen fusion) to over 200 M☉ (the most massive known stars). Supermassive black holes at the centres of galaxies range from millions to billions of solar masses: the black hole at the centre of the Milky Way (Sagittarius A*) is approximately 4.3 million M☉.
Quick Reference Table
| Stones (st) | Solar Masses (M☉) |
|---|---|
| 1 st | 3.193 × 10-30 M☉ |
| 2 st | 6.386 × 10-30 M☉ |
| 5 st | 1.596 × 10-29 M☉ |
| 10 st | 3.193 × 10-29 M☉ |
| 25 st | 7.982 × 10-29 M☉ |
| 50 st | 1.596 × 10-28 M☉ |
| 100 st | 3.193 × 10-28 M☉ |