Sun's Radius to Megameter Converter
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Instant · Precise · Universal
32 units available
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How to Convert Sun's Radius to Megameter
To convert solar radii to km: multiply by 696,340. To convert solar radii to AU: multiply by 0.00465.
1 R☉ = 6.9634 × 10⁸ m = 696,340 km ≈ 109 × Earth's radius ≈ 0.00465 AU.
For example, 1 Sun's Radius (R☉) = 696.34 Megameter (Mm).
Sun's Radius to Megameter — Common Values
| Sun's Radius (R☉) | Megameter (Mm) |
|---|---|
| 0.1 | 69.634 |
| 0.5 | 348.17 |
| 1 | 696.34 |
| 2 | 1392.68 |
| 5 | 3481.7 |
| 10 | 6963.4 |
| 25 | 17408.5 |
| 50 | 34817 |
| 100 | 69634 |
| 500 | 348170 |
| 1000 | 696340 |
About Sun's Radius (R☉)
Definition
The solar radius is the radius of the Sun, approximately 6.9634 × 10⁸ meters (about 696,340 km).
Mathematical Relationship
1 R☉ = 6.9634 × 10⁸ m = 696,340 km ≈ 109 × Earth's radius ≈ 0.00465 AU.
Conversion Formula
To convert solar radii to km: multiply by 696,340. To convert solar radii to AU: multiply by 0.00465.
Practical Applications
Describing stellar sizes: Betelgeuse ≈ 700 R☉, Sirius ≈ 1.7 R☉, a white dwarf ≈ 0.01 R☉.
Interesting Facts
You could line up about 109 Earths across the Sun's diameter. The largest known star (UY Scuti) is about 1,700 R☉.
Common Mistakes
Confusing solar radius with solar diameter — the diameter is 2 R☉. Also, stellar catalogs list radius, not diameter.
Educational Tips
The Sun's radius (109 × Earth) gives a sense of scale: you could fit over a million Earths inside the Sun by volume.
About Megameter (Mm)
Definition
The megameter is a unit of length equal to 10⁶ meters (1,000 kilometers or one million meters).
Mathematical Relationship
1 Mm = 10⁶ m = 1,000 km = 1,000,000 m.
Conversion Formula
To convert Mm to km: multiply by 1,000. To convert Mm to miles: multiply by 621.371.
Practical Applications
Describing planetary diameters and distances within the solar system in a compact metric form.
Interesting Facts
Earth's diameter ≈ 12.7 Mm. The circumference of Earth ≈ 40 Mm — this is by design, as the meter was originally defined from it.
Common Mistakes
Uppercase matters: 'Mm' = megameter (10⁶ m), 'mm' = millimeter (10⁻³ m) — a factor of 10⁹ difference!
Educational Tips
Remember the SI prefix pattern: kilo (10³), mega (10⁶), giga (10⁹). Each step is 1,000× larger.