Instant · Precise · Universal
34 units available
6 categories total
To convert solar masses to kg: multiply by 1.98847 × 10³⁰.
M☉ = 1.98847 × 10³⁰ kg ≈ 333,000 M⊕ ≈ 1,048 M_Jupiter.
For example, 1 Sun's Mass (M☉) = 1.957065e+27 Long Ton (UK) (ton (UK)).
| Sun's Mass (M☉) | Long Ton (UK) (ton (UK)) |
|---|---|
| 0.1 | 1.957065e+26 |
| 0.5 | 9.785326e+26 |
| 1 | 1.957065e+27 |
| 2 | 3.914130e+27 |
| 5 | 9.785326e+27 |
| 10 | 1.957065e+28 |
| 25 | 4.892663e+28 |
| 50 | 9.785326e+28 |
| 100 | 1.957065e+29 |
| 500 | 9.785326e+29 |
| 1000 | 1.957065e+30 |
The solar mass is the mass of the Sun, approximately 1.989 × 10³⁰ kilograms — about 333,000 times the mass of Earth.
M☉ = 1.98847 × 10³⁰ kg ≈ 333,000 M⊕ ≈ 1,048 M_Jupiter.
To convert solar masses to kg: multiply by 1.98847 × 10³⁰.
Expressing stellar masses: Betelgeuse ≈ 15 M☉, Sirius ≈ 2 M☉, a typical neutron star ≈ 1.4 M☉.
The Sun loses about 5 million tonnes per second through nuclear fusion (E=mc²), but that's only 10⁻¹³ M☉ per year.
The Sun is losing mass continuously through radiation and solar wind — its mass is not quite constant over billions of years.
Almost everything in astronomy uses solar masses: stars (0.1–100 M☉), galaxies (10⁹–10¹² M☉), black holes (3–10⁹ M☉).
The long ton (imperial ton) is a unit of mass equal to 2,240 pounds or approximately 1,016 kilograms.
1 long ton = 2,240 lb = 1,016.047 kg = 1.016 metric tonnes = 1.12 short tons.
To convert long tons to kg: multiply by 1,016.047. To convert long tons to short tons: multiply by 1.12.
Ship displacement tonnage (historical, some naval vessels still use it), and some UK agricultural contexts.
Naval ship displacement is traditionally given in long tons. HMS Titanic displaced about 52,310 long tons.
Assuming a 'ton' is a 'ton' — the long ton is 12% heavier than a short ton and 1.6% heavier than a metric tonne.
Easy memory: Long ton = British = 2,240 lb (long = larger). Short ton = US = 2,000 lb (short = smaller).



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