Radius to Circumference

Need to convert Radius to Circumference? Our professional calculator delivers accurate results instantly. Features conversion tables, formulas, and practical...

1 Radius = 6.28319 Circumference (standard conversion factor). · Updated 2026-05-29

Circle Calculator

Radius to Circumference Conversion Table

Common Radius to Circumference conversion values

Radius Circumference
1 r 6.283 C
10 r 62.832 C
50 r 314.159 C
100 r 628.319 C
500 r 3141.593 C
1000 r 6283.185 C

The formula

Circle conversions use π-based geometry (radius, diameter, circumference, area).

Example: 1 Radius = 6.28319 Circumference