Free · 18 shapes

Geometry Shape Calculator

Pick a shape, type its measurements and get area, perimeter, volume and surface area instantly — each formula shown with your numbers substituted.

Circle

r

Area

50.2655 cm²

A=πr2=π×42≈50.2655A = \pi r^2 = \pi \times 4^2 \approx 50.2655

Circumference

25.1327 cm

C=2πr=2π×4≈25.1327C = 2\pi r = 2\pi \times 4 \approx 25.1327

Diameter

8 cm

d=2r=2×4≈8d = 2r = 2 \times 4 \approx 8