Volume Calculator
Volume of cylinders, boxes, spheres and cones.
Enter your values
Choose one of: Cylinder, Rectangular box, Sphere, Cone.
Enter the radius, or length in ft.
Enter the height, or width in ft.
Enter the depth (box only) in ft.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Volume
- 282.74334 cubic ft
- In gallons (US)
- 2115.067
- In litres
- 8006.39
- In cubic yards
- 10.472
- In cubic metres
- 8.0064
Quick answer
Volume measures three-dimensional space: a cylinder is πr²h, a box is l×w×h, a sphere is 4/3πr³ and a cone is ⅓πr²h.
V(cylinder) = πr²h
At a glance
| What it does | Volume of cylinders, boxes, spheres and cones. |
|---|---|
| Category | Math |
| Inputs needed | Shape, Radius, or length, Height, or width, Depth (box only) |
| Main output | Volume |
| Formula | V(cylinder) = πr²h |
| Cost | Free — no sign-up, no download |
How to use the Volume Calculator
- 1Choose the shape.
- 2Enter the dimensions in feet.
- 3Read the volume in several units.
Inputs explained
- Shape
- Choose one of: Cylinder, Rectangular box, Sphere, Cone.
- Radius, or length(ft)
- Enter the radius, or length in ft.
- Height, or width(ft)
- Enter the height, or width in ft.
- Depth (box only)(ft)
- Enter the depth (box only) in ft.
Worked example
Using the values the calculator loads with:
Inputs
- ShapeCylinder
- Radius, or length3 ft
- Height, or width10 ft
- Depth (box only)4 ft
Results
- Volume282.74334 cubic ft
- In gallons (US)2115.067
- In litres8006.39
- In cubic yards10.472
- In cubic metres8.0064
Frequently asked questions
How many gallons in a cubic foot?
7.48 US gallons, or 6.23 imperial gallons.
How do I find pool volume?
Treat it as a box using average depth: length × width × average depth, then convert to gallons.
What do I need to enter into the Volume Calculator?
Just 4 values: shape, radius, or length, height, or width, depth (box only). Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Volume Calculator work out the answer?
Volume measures three-dimensional space: a cylinder is πr²h, a box is l×w×h, a sphere is 4/3πr³ and a cone is ⅓πr²h. It applies the formula V(cylinder) = πr²h and shows the working so you can check each step by hand.
Is the Volume Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.