Sun's Radius to Petameter
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How to Convert Sun's Radius to Petameter
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☉) = 6.963400e-7 Petameter (Pm).
Sun's Radius to Petameter — Common Values
| Sun's Radius (R☉) | Petameter (Pm) |
|---|---|
| 0.1 | 6.963400e-8 |
| 0.5 | 3.481700e-7 |
| 1 | 6.963400e-7 |
| 2 | 0.00000139268 |
| 5 | 0.0000034817 |
| 10 | 0.0000069634 |
| 25 | 0.0000174085 |
| 50 | 0.000034817 |
| 100 | 0.000069634 |
| 500 | 0.00034817 |
| 1000 | 0.00069634 |
About Sun's Radius (R☉)
The solar radius is the radius of the Sun, approximately 6.9634 × 10⁸ meters (about 696,340 km).
1 R☉ = 6.9634 × 10⁸ m = 696,340 km ≈ 109 × Earth's radius ≈ 0.00465 AU.
To convert solar radii to km: multiply by 696,340. To convert solar radii to AU: multiply by 0.00465.
Describing stellar sizes: Betelgeuse ≈ 700 R☉, Sirius ≈ 1.7 R☉, a white dwarf ≈ 0.01 R☉.
You could line up about 109 Earths across the Sun's diameter. The largest known star (UY Scuti) is about 1,700 R☉.
Confusing solar radius with solar diameter — the diameter is 2 R☉. Also, stellar catalogs list radius, not diameter.
The Sun's radius (109 × Earth) gives a sense of scale: you could fit over a million Earths inside the Sun by volume.
