Space & planets
How wide is the Sun?
The Sun is 1,391,400 km · 864,575.9 mi across.
Sun at true scale
- Sun 1,391,400 km · 864,575.9 mi
Sun (blue) beside , all on one scale.
The Sun’s mean diameter is about 1,391,400 km, twice NASA’s volumetric mean radius of 695,700 km. That makes it about 109 times as wide as Earth and nearly ten times as wide as Jupiter.
Compared with familiar things
Can you guess it by eye?
Play five comparisons featuring the Sun: resize each object beside a fixed reference, then see how close you were. No sign-up needed.
Play five comparisonsWhat is measured
Mean diameter: 1,391,400 km · 864,575.9 mi. Twice the NASA NSSDC volumetric mean radius of 695,700 km.
Source: NASA Sun Fact Sheet (NSSDC). Checked 2026-09-28. The silhouette is scaled so this measurement is exact; its other proportions are illustrative.