3D Sphere Explorer

Formulas

Volume (V) = (4/3)πr³

Surface Area (SA) = 4πr²

Diameter (d) = 2r

Circumference (C) = 2πr

How to Use

• Drag to rotate the sphere in 3D

• Scroll to zoom in / out

• Adjust the radius slider to change size

• Watch measurements update in real-time

Key Terms

Radius (r) — distance from center to any point on the surface

Diameter (d) — distance through the center from one surface point to another

Great Circle — largest circle on a sphere (like the equator)

Hemisphere — half of a sphere divided by a great circle

Did You Know?

The sphere is nature's most efficient shape — it has the smallest surface area for a given volume. That's why planets, bubbles, and droplets are spherical!