Sun's Radius to Petameter Converter
Unit Converter
Instant · Precise · Universal
32 units available
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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☉)
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 Petameter (Pm)
Definition
The petameter is a unit of length equal to 10¹⁵ meters, or about 0.1 light-years.
Mathematical Relationship
1 Pm = 10¹⁵ m ≈ 0.1057 light-years ≈ 0.0324 parsecs.
Conversion Formula
To convert Pm to light-years: divide by 9.461. To convert Pm to parsecs: divide by 30.857.
Practical Applications
No practical everyday applications. Would describe distances to nearby stars in metric.
Interesting Facts
1 light-year ≈ 9.46 Pm. The Oort Cloud extends to roughly 15,000 Pm from the Sun.
Common Mistakes
Case sensitivity is critical: Pm (petameter) vs. pm (picometer) differ by a factor of 10²⁷!
Educational Tips
Remember: 1 light-year ≈ 9.46 Pm, so a few Pm is a fraction of the distance to the nearest star.