Surface Area of a Hemisphere FAQs
How do you calculate the surface area of a hemisphere?
Use the radius r. The curved surface area is 2πr², and the total surface area including the base is 3πr². This calculator applies the correct formula automatically from radius or diameter.
What is the difference between total and curved surface area of a hemisphere?
The total surface area includes the circular base and the curved part, so it is 3πr². The curved surface area excludes the base and is only 2πr².
Can I calculate hemisphere surface area from the diameter?
Yes. If you know the diameter, divide it by 2 to get the radius, then use the selected formula. The calculator does that conversion automatically.
How do you find the radius from the surface area of a hemisphere?
Work backwards from the selected formula. For curved surface area, r = sqrt(A / 2π). For total surface area, r = sqrt(A / 3π).
When is a hemisphere surface area calculator useful?
It is useful for geometry homework, domes, tanks, bowls, covers, and any measurement where you need the outer area of a half-sphere shape.
