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Volume calculator

Compute the volume of a box, cube, sphere, cylinder or cone.

Related tools

All Geometry tools →
Aquarium volume calculatorCompute the water volume of a rectangular aquarium in litres and gallons.Cone volume calculatorCompute the volume, surface area and slant height of a cone, drawn to scale.Cylinder volume calculatorCompute the volume and surface area of a cylinder from its radius and height.Pyramid volume calculatorCompute the volume of a square-based pyramid from its base and height.Sphere volume calculatorCompute the volume and surface area of a sphere from its radius.Triangular prism volume calculatorCompute the volume of a triangular prism from its base, height and length.Volume of Revolution CalculatorDisk, washer and shell methods about the x-axis, the y-axis, or any line y = k or x = k. The integral is set up on screen before it is evaluated, and shifting the axis changes the radius to |f(x) − k| — the step most calculators get wrong.Volume of an ellipsoid calculatorThe volume of an ellipsoid from its three semi-axes: V = 4⁄3·π·a·b·c. It also reports the surface area (Thomsen's approximation) — set all three axes equal and it becomes a sphere. Useful for eggs, tanks, planets and any squashed sphere.

Need Volume? The Volume calculator derives it from Shape, Length / side / radius, Width / height, Height (box only) in one step. For instance, with Shape = Box, Length / side / radius = 5, Width / height = 3 and Height (box only) = 4 it returns Volume = 60.

How to use it

  1. Enter your values: Shape, Length / side / radius, Width / height, Height (box only).
  2. Read the result instantly: Volume.

Frequently asked questions

What does the Volume calculator actually compute?

It takes Shape, Length / side / radius, Width / height and Height (box only) and derives Volume from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

4 values: Shape, Length / side / radius, Width / height and Height (box only). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Shape = Box, Length / side / radius = 5, Width / height = 3 and Height (box only) = 4, the calculator returns Volume = 60. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Shape = Cube, Length / side / radius = 10, Width / height = 6 and Height (box only) = 8 instead, Volume goes from 60 to 1,000 — which is why it is worth testing a few scenarios rather than trusting a single figure.

Which “Shape” option should I choose?

You can pick between « Box », « Cube », « Sphere », « Cylinder » and « Cone ». Each one changes what the calculator works out, so switch and compare — the default is « Box ».

What does it give for smaller values?

Scaled down to Shape = Box, Length / side / radius = 3, Width / height = 2 and Height (box only) = 2, Volume comes out at 12. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Homework and site work alike: how much paint a wall takes, how much water a tank holds, whether a corner is square — and, on the coordinate side, the slope between two points, the distance across a plan, the midpoint of a span.

What is the most common mistake?

Mixing units inside one shape. Entering a length in centimetres and a width in metres gives an area wrong by a factor of a hundred, and the result looks perfectly plausible.

What is the difference between the Volume calculator and the Aquarium volume calculator?

This one returns Volume; the Aquarium volume calculator returns Volume (litres) and Volume (US gallons). That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Cone volume calculator is the closest one after this: Compute the volume, surface area and slant height of a cone, drawn to scale.

Further reading

All guides →
How-toHow to Calculate VolumeVolume is the space inside a shape. Here's how to find it for boxes, cylinders and spheres, and why keeping your units consistent is the whole game.How-toCircle: Circumference and AreaCircumference is 2πr, area is πr². Here's how radius, diameter and π fit together, both formulas worked through, and how not to mix them up.How-toCooking Measurement ConversionsA few anchors — cups, tablespoons, grams — cover most recipes. Here's the handful worth memorising, why weight beats volume, and when to reach for a scale.How-toHow to Scale a Recipe Up or DownMultiply every ingredient by the same factor. Here's how to find it, why the ratios must stay fixed, what doesn't scale linearly, and how to round sensibly.How-toWhat Wattage of Heater Does an Aquarium Need? Volume Is Only Half the AnswerThe same tank needs a 100 W heater in a warm flat and 300 W in an unheated room. The variable is the gap between the water and the room, which most rules of thumb drop entirely. Plus why two smaller heaters beat one big one, and where this calculator's recommendation stops being trustworthy.How-toHow Much Substrate Does an Aquarium Need? Depth, Weight and Grain SizeThe depth follows the job: a bare display, a planted tank whose roots need room, an under-gravel plate. Then comes the number people are unprepared for — substrate is what puts a filled tank past what a piece of furniture can hold. Plus why fine sand compacts and coarse gravel traps waste.