🧊Volume Calculator
Pick a 3D shape and enter its dimensions to calculate volume, with the formula shown.
Runs entirely in your browser. No data is sent to a server.
Free Volume Calculator
Calculate the volume of any common 3D shape with our free volume calculator. Choose from spheres, cubes, rectangular prisms, cylinders, cones, pyramids, triangular prisms, and ellipsoids — enter the dimensions, and get the volume instantly with the exact formula shown, substituted with your values.
Sphere, cylinder, cone, and ellipsoid results are shown in exact π-form (like 36π) as well as decimal, so you can see precisely how the number is derived. Every shape also shows its total surface area as a bonus cross-reference.
Inputs are validated per shape, so negative or zero dimensions are caught immediately with a clear message. Whether it's for a geometry assignment or a real-world measurement, get accurate results with the formula shown. No sign-up, no downloads required. See the About page or the FAQ for more.
About the Volume Calculator
Supported solids
Sphere & cube
(4/3)πr³ and s³.
Rectangular prism
l×w×h.
Cylinder & cone
πr²h and (1/3)πr²h, exact π-form.
Pyramid
(1/3)lwh, square or rectangular base.
Triangular prism
Cross-section area × length.
Ellipsoid
(4/3)πabc, with an approximate surface area.
Frequently Asked Questions
Which shapes are supported?
Sphere, cube, rectangular prism, cylinder, cone, pyramid (square/rectangular base), triangular prism, and ellipsoid.
How is cone volume calculated?
Using V = ⅓πr²h, where r is the base radius and h is the height.
Does it show the formula used?
Yes, each shape shows its formula with your values substituted in.
Are results exact or decimal?
Both — sphere, cylinder, cone, and ellipsoid results are shown in exact π-form alongside decimals.
Does it calculate surface area too?
Yes, total surface area is shown as a bonus output for each shape.
What units does it use?
It's unit-agnostic; results are labeled units³ matching whatever unit you entered.
What if I enter a negative dimension?
It's rejected with a clear validation message.
Can I calculate a pyramid with a rectangular (non-square) base?
Yes, both square and rectangular base pyramids are supported.
Is it free?
Completely free, no sign-up or limits.
Does it work on mobile?
Yes, fully responsive.