By Zencalcy Editorial TeamLast reviewed About us
Rugby balls and planetary bulges: V = ⁴⁄₃πabc from the three semi-axis lengths. When a = b = c = r it reduces exactly to the sphere formula.
V = (4/3)πabc — enter dimensions, get the result with steps.
V = (4/3)πabc
| Symbol | Meaning |
|---|---|
| a, b, c | Three semi-axis lengths (≥ 0) |
Semi-axes 5, 3, 3 → V = ⁴⁄₃π × 45 ≈ 188.4956. Equal axes 3,3,3 → sphere 113.0973.
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Semi-axis is half the full width — like a radius vs diameter. Enter halves.
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Content updated: September 2026