Tank Volume Calculator
Learn how to find the volume of different containers with this tank volume calculator.
Full capacity564.018 US gallons2,135.04 litres · 75.3982 cu ft
Litres2,135.04
Imperial gallons469.643
Cubic feet75.3982
Cubic metres2.13504
Weight of water when full4,707 lb2,135 kg — water is 8.345 lb per US gallon
The method
volume from the tank shape, then filled depth if partial
A horizontal cylinder is not half full at half depth
Actually it is — the circle is symmetric about its centre, so the halfway line really is half the volume. But a quarter of the depth is only about 15% of the volume, because the tank is narrow at the bottom. That is why a dipstick on a horizontal tank needs a chart rather than a linear scale.
Water weighs 8.345 pounds per US gallon, so a modest 500-gallon tank holds over two tons. Whatever it stands on has to carry that.