Sun's Radius to Picometer Converter
Unit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Sun's Radius to Picometer
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+20 Picometer (pm).
Sun's Radius to Picometer — Common Values
| Sun's Radius (R☉) | Picometer (pm) |
|---|---|
| 0.1 | 6.963400e+19 |
| 0.5 | 3.481700e+20 |
| 1 | 6.963400e+20 |
| 2 | 1.392680e+21 |
| 5 | 3.481700e+21 |
| 10 | 6.963400e+21 |
| 25 | 1.740850e+22 |
| 50 | 3.481700e+22 |
| 100 | 6.963400e+22 |
| 500 | 3.481700e+23 |
| 1000 | 6.963400e+23 |
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 Picometer (pm)
Definition
The picometer is a unit of length equal to 10⁻¹² meters, or one trillionth of a meter.
Mathematical Relationship
1 pm = 10⁻¹² m = 0.01 Å = 1,000 fm. One nanometer equals 1,000 picometers.
Conversion Formula
To convert pm to meters: multiply by 10⁻¹². To convert pm to angstroms: divide by 100.
Practical Applications
Expressing covalent bond lengths (e.g., C–C bond ≈ 154 pm), atomic radii, and crystal lattice spacings.
Interesting Facts
The hydrogen atom has a radius of about 53 pm (the Bohr radius), while a carbon-carbon single bond is about 154 pm long.
Common Mistakes
Mixing up picometers and nanometers — remember 1 nm = 1,000 pm. Some sources still use the deprecated angstrom.
Educational Tips
Think of pm as the natural unit for atoms: most atomic radii fall between 30 pm and 300 pm.