Solar mass is used in astronomy.
Solar mass to Stones Converter — Msun to st
Convert Solar mass (Msun) to Stone (st) using the exact conversion factor (1 solar mass = 3.131304e+29 stone). See the formula, worked examples, conversion table, history, and common uses.
Solar mass to Stones converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A stone is 14 pounds.
Result = input x 1.98847e+30 / 6.35029318.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Solar mass to Stones
Weight conversions between Solar mass and Stone come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: Solar mass is used in astronomy, and a stone is 14 pounds.
Formula
stones = solar mass × 3.131304e+29
This factor comes from each unit's defined relationship to the category's base unit: 1 solar mass equals 1.98847e+30 base units, and 1 stone equals 6.35029318 base units, so dividing one by the other gives the direct solar mass-to-stone factor of 3.131304e+29.
Simple example
1 Msun × 3.131304e+29 = 3.131304e+29 st
1 solar mass = 3.131304e+29 stones.
Real-world example
50 Msun × 3.131304e+29 = 1.565652e+31 st
50 solar mass = 1.565652e+31 stones.
Conversion table
| Solar mass (Msun) | Stone (st) |
|---|---|
| 1 Msun | 3.131304e+29 st |
| 5 Msun | 1.565652e+30 st |
| 10 Msun | 3.131304e+30 st |
| 25 Msun | 7.828261e+30 st |
| 50 Msun | 1.565652e+31 st |
| 100 Msun | 3.131304e+31 st |
Reverse conversion: Stone to Solar mass
3.131304e+29 st × 3.193557e-30 = 0.9999999213 Msun
3.131304e+29 stones = 0.9999999213 solar mass.
solar mass = stones × 3.193557e-30
For a page dedicated to this direction, see Stone to Solar mass.
Understanding the Solar mass (Msun)
Solar mass is used in astronomy.
Understanding the Stone
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Where it's used: United Kingdom and Ireland (body weight)
Uses of the Stone today
- Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds')
- Historical wool and agricultural produce weighing
History of the Stone
The stone dates to medieval England as a general-purpose weight unit, historically varying by region and commodity (a 'stone' of wool differed from a 'stone' of meat) before settling on 14 pounds for general use. It remains in everyday use for body weight in the UK and Ireland, unlike most other English customary units which have been replaced or supplemented by metric measures.
Historical origin. Stone was not the invention of a single named person; it developed through the process described above.
Stone — sources
- UK Weights and Measures Act 1985 — Confirms the stone (14 lb) as a legally recognized UK unit for body weight.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones are in 1 solar mass?
1 solar mass equals 3.131304e+29 stones, using the exact defined conversion factor rather than an estimate.
How do I convert solar mass to stone?
Multiply the solar mass value by 3.131304e+29. The converter above does this instantly to whatever precision you set.
How do I convert stone back to solar mass?
Use the reverse factor: 1 stone equals 3.193557e-30 solar mass. You can also use the swap control in the converter above to flip the direction instantly.
What is a solar mass?
Solar mass (Msun) is a unit of mass/weight.
What is a stone?
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Is the solar mass to stone conversion exact?
Yes. A stone is 14 pounds: exactly 6.35029318 kilograms. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.