Convert Scruples to Solar Masses
Convert Scruples (s ap) to Solar Masses (M☉) instantly and accurately.
Conversion Formula
M☉ = s ap × 6.515989582e-34
About Scruples
A scruple (s ap) is a unit of the apothecary weight system equal to 20 grains or approximately 1.296 grams. Derived from the Latin 'scrupulus' (a small sharp stone used as a counterweight), it was the basic dispensing unit in pre-metric pharmacy across Europe. The apothecary system divided the fluid ounce into 8 drams, each dram into 3 scruples, and each scruple into 20 grains - a hierarchy memorised by every 19th-century pharmacist.
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
| Scruples (s ap) | Solar Masses (M☉) |
|---|---|
| 1 s ap | 6.516 × 10-34 M☉ |
| 2 s ap | 1.303 × 10-33 M☉ |
| 5 s ap | 3.258 × 10-33 M☉ |
| 10 s ap | 6.516 × 10-33 M☉ |
| 25 s ap | 1.629 × 10-32 M☉ |
| 50 s ap | 3.258 × 10-32 M☉ |
| 100 s ap | 6.516 × 10-32 M☉ |