Diameter to Radius
Convert Diameter to Radius. Example: 1 Diameter = 0.5 Radius. Includes formula and conversion table.
1 Diameter = 0.5 Radius (standard conversion factor). · Updated 2026-07-12
Circle Calculator
Diameter to Radius Conversion Table
Common Diameter to Radius conversion values
| Diameter | Radius |
|---|---|
| 1 d | 0.500 r |
| 10 d | 5.000 r |
| 50 d | 25.000 r |
| 100 d | 50.000 r |
| 500 d | 250.000 r |
| 1000 d | 500.000 r |
The formula
Circle conversions use π-based geometry (radius, diameter, circumference, area).
Example: 1 Diameter = 0.5 Radius