Which shape should I pick?

Cube for objects with all sides equal. Rectangular box for boxes / rooms / fish tanks (length × width × height). Sphere for balls. Cylinder for cans, pots, pipes. Cone for funnels and ice-cream cones.

How do I convert volume to liters or gallons?

In metric, 1 cm³ equals 1 mL, so 1 m³ equals 1000 liters. In imperial (US), 1 US gallon equals 231 in³, and 1 ft³ equals about 7.48 US gallons. The calculator picks liters in metric units (m / cm) and US gallons in imperial (ft / in) automatically.

What unit are dimensions in?

Whatever you pick under "Unit" — meters, centimeters, feet, or inches. The calculator does not convert numeric inputs when you change the unit; re-enter the values if you switch.

Why doesn't this show surface area?

Surface area is a different question with its own formulas and use cases (paint coverage, wrapping, heat transfer). To keep the result panel focused on the headline answer, we left it out — open a separate calculator if that's what you need.

GEOGeometry

Volume Calculator

Calculate the volume of a cube, rectangular box, sphere, cylinder, or cone from its dimensions, in metric or imperial units. Also shows liquid capacity in liters or gallons.

Shape

Pick the shape that matches your object.

Unit

Unit applied to every dimension above.

Side(optional)

Length(optional)

Width(optional)

Height(optional)

Radius(optional)

Try an example

Enter values above to see results

How It Works

Formula

V_{\text{cube}} = s^3

V_{\text{box}} = l \cdot w \cdot h

V_{\text{sphere}} = \tfrac{4}{3}\,\pi r^3

V_{\text{cylinder}} = \pi r^2 h

V_{\text{cone}} = \tfrac{1}{3}\,\pi r^2 h

Where

$s$: Side length of a cube
$l$: Length of a rectangular box
$w$: Width of a rectangular box
$h$: Height of a box, cylinder, or cone
$r$: Radius of a sphere, cylinder, or cone
$V$: Volume in cubic units (e.g. m³, in³)
$\pi$: Pi — ≈ 3.14159, the ratio of a circle's circumference to its diameter

Pick a shape, enter its dimensions, and the calculator applies the matching geometric formula (e.g. πr²h for a cylinder). Liquid capacity is a unit conversion of the volume — liters in metric, US gallons in imperial.

Frequently Asked Questions

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Ready to Calculate?