Construction

Tank Volume Calculator

Calculate the volume of a vertical cylindrical tank in gallons and liters.

Diameter

Height

Calculated Output

Volume 564.02

Volume 2,135.04

Volume 75.398

Formula: volume = π × (diameter/2)² × height

Step-by-Step Breakdown

1. Values used:

2. Diameter = 4

3. Height = 6

5. Volume = 564.02

6. Volume = 2,135.04

7. Volume = 75.398

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The math behind it

A cylinder's volume = π × radius² × height.

Multiply cubic feet by 7.48052 for US gallons, or 28.317 for liters.

4 ft diameter, 6 ft tall → π × 2² × 6 = 75.4 ft³ ≈ 564 gallons.

What about a horizontal tank?

Horizontal cylinders need a more complex partial-fill formula; this tool assumes a full vertical cylinder.