Hemisphere Calculator

Find a hemisphere’s volume and surface area.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator finds a hemisphere's volume (⅔πr³) and its surface area, reporting both the curved surface area (2πr²) and the total surface area including the flat circular base (3πr²), from a single radius input.

It's used in geometry coursework, but also by anyone designing or estimating material for a dome roof, a bowl-shaped tank, a planetarium screen or a rounded storage container, where the flat-base and curved-only surface areas matter for different reasons (painting vs. structural material, for example).

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