Sphere Calculator
Calculate sphere volume, surface area, and circumference. Adjust radius or diameter, choose a preset sphere, and compare sizes visually.
Step 1: Sphere Dimensions
Sphere Formulas
Volume = (4/3)πr³
Surface Area = 4πr²
Circumference = 2πr
Diameter = 2r
Step 2: Units & Visualization
Common Sphere Sizes
Basketball: 4.7″ radius • 435 ci
Baseball: 1.4″ radius • 12.3 ci
Tennis ball: 1.3″ radius • 9.2 ci
Golf ball: 0.84″ radius • 2.5 ci
Sphere Properties
Sphere Volume
Sphere Size Comparison
| Sphere Type | Radius (in) | Volume (ci) | Volume (L) |
|---|
Sphere Formulas
Volume = (4/3)πr³
Where r = radius
π ≈ 3.14159265
Surface Area = 4πr²
Circumference = 2πr
Diameter = 2r
Conversions:
1 cubic inch = 16.3871 cc = 0.0163871 liters
Example: Basketball
Radius = 4.7 inches
Volume = (4/3)π × 4.7³ ≈ 435 ci
Surface area = 4π × 4.7² ≈ 277.6 in²
Circumference = 2π × 4.7 ≈ 29.5 in
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