oil & gas calculator
Tank Volume Calculator
Find the liquid volume in a vertical or horizontal cylindrical tank, including partial fills.
How it works
Vertical: V = pi x r^2 x liquid height. Horizontal (partial): circular-segment area x length. 1 bbl = 42 gal.
Worked example
A 10 ft diameter x 20 ft tall vertical tank, full: V = pi x 25 x 20 = 1,571 ft3 = 11,750 gal (279.8 bbl).
When to use it
- For a vertical tank, 'liquid level' is the fill height; length applies to horizontal tanks only.
- This is shell volume and excludes tank heads and internal deadwood.