Tank Volume Calculator

Calculating Tank Volume and Capacity

Tanks come in many shapes — cylindrical, rectangular, conical, spherical, and combinations. Calculating exact volume is needed for: chemical storage capacity, water supply planning, liquid level monitoring, and transport compliance (maximum fill levels for tankers).

Volume Formulas

Horizontal/Vertical Cylinder: V = π × r² × L (L = length for horizontal, height for vertical)

Rectangular (Box): V = Length × Width × Height

Cone: V = (1/3) × π × r² × h

Sphere: V = (4/3) × π × r³

Spheroid (ellipsoid): V = (4/3) × π × a × b × c

How to Use This Calculator

Select tank shape, enter dimensions, and optionally enter a liquid level to calculate partial fill volume.

Practical Examples

Example 1 — Vertical cylindrical water tank: Diameter 3m, height 4m. V = π × 1.5² × 4 = 28.3 m³ = 28,300 litres.

Example 2 — Horizontal fuel tank: 2m diameter, 5m length. 60% full. Full V = π × 1² × 5 = 15.71 m³. For partial fill, use numerical integration — calculator provides this. At 60% fill height (1.2m), V ≈ 8.9 m³ = 8,900 litres.

Example 3 — Rectangular water tower: 4m × 4m × 6m. V = 96 m³ = 96,000 litres — sufficient for about 400 people per day.