About

tankvolumecalc.com is a free reference for tank volume math: a universal calculator, shape-specific tools, and printable inch-by-inch charts for standard tanks. Everything runs in your browser; nothing you type is transmitted anywhere.

The site exists because partial-fill volume is genuinely hard to do right — most tools approximate where exact formulas exist, and the standard home oil tank isn't even the shape most calculators assume. Our methodology page shows every formula and how it's verified.

The site is supported by advertising. Questions, corrections, or a tank you'd like charted: contactus@tankvolumecalc.com.