Cone
Fill in any fields — the empty ones are calculated, so it works in every direction.
Formula
V = πr²h / 3, l² = r² + h²
Worked example
Given: Radius = 3 cm; Height = 4 cm
Result: Slant height = 5 cm; Volume = 37.7 cm³; Total surface = 75.4 cm²
How it is calculated
1. Enter the values you know. 2. The calculator converts them to base units and applies the formula. 3. The result is shown in the unit you choose.
Frequently asked questions
How do I calculate it?
Formula: V = πr²h / 3, l² = r² + h². Given: Radius = 3 cm; Height = 4 cm. Result: Slant height = 5 cm; Volume = 37.7 cm³; Total surface = 75.4 cm².
Is the calculator free and private?
Yes. It is free, needs no sign-up and runs in your browser — the numbers you type stay on your device.