Area and Volume Calculator
Calculate area, perimeter, and volume of common shapes from measurements you enter.
Your result
Choose a shape and enter its measurements.
How to use it
- Choose the shape.
- Enter the lengths that are shown.
- Read the area and the perimeter or the volume.
Examples
- A 4 by 3 rectangleRectangle, length 4 and width 3. The area is 12.00 and the perimeter is 14.00.
- A circle of radius 1Circle and radius 1. The area is 3.14 and the perimeter is 6.28.
- A 3, 4, 5 triangleTriangle and sides 3, 4, and 5. The area is 6.00 and the perimeter is 12.00.
Tool details and privacy
A rectangle, a triangle, and a box use sides. A circle, a sphere, and a cylinder use a radius. Pi is 3.141592653589793 and the result is rounded once.
A circle and a sphere hide the other two lengths. A rectangle and a cylinder hide the third. A triangle and a box show all three.
Options
- The first length of a circle, a sphere, and a cylinder is the radius. For a box it is the width, then the depth, then the height.
Limits
- Amounts use two decimal places and up to 12 digits before the decimal point. Rounding is half up.
- 1,250 is rejected. Write 1250 or 1250.50.
- A triangle whose sides cannot meet is rejected. Pi is rounded once, not on each part.
Privacy
The numbers are calculated in your browser and are not sent to any server.
Questions
What is the area of a circle of radius 1?
3.14, and the perimeter is 6.28.
And the volume of a sphere?
4.19 for a radius of 1, and its surface area is 12.57.
Is 1, 1, 3 a triangle?
No. A message appears because the sides cannot meet.
Is the unit metres?
It is the unit you type. The result uses that same unit.