Use this sphere diameter calculator to find the diameter of a sphere by entering its radius. Apply the sphere diameter formula for accurate results.
r = radius
Multiply the radius by 2 to find the diameter.
| Radius (r) | Diameter (D) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 8 |
| 5 | 10 |
1. Take the radius of the sphere.
2. Multiply it by 2.
3. The result is the sphere's diameter.
This sphere diameter calculator automatically computes the diameter using D = 2 × r with up to six decimal places.
• The diameter is twice the radius and defines the full width of a sphere.
• Spheres are widely used in physics, geometry, and everyday objects.
• Knowing the diameter allows easy calculation of circumference, volume, and surface area.
• Diameter is a key property in engineering and design.
• In astronomy, planetary diameters are essential for scale comparisons.