Calculators
Sphere Calculator
Calculate sphere volume, surface area, diameter, and great-circle circumference from a radius locally in your browser.
Enter a radius from 0 (exclusive) to 1000000000 to see the volume (4/3πr³), surface area (4πr²), diameter (2r), and great-circle circumference (2πr). The calculation runs locally in your browser; your value is not uploaded or stored.
Find sphere measurements without uploading anything.
Enter a radius from 0 (exclusive) to 1000000000 to see the volume, surface area, diameter, and great-circle circumference. Everything runs locally in your browser, so your value is not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What does the sphere calculator show?
Enter a radius from 0 (exclusive) to 1000000000. The calculator returns the volume (4/3 times pi times r cubed), the surface area (4 times pi times r squared), the diameter (2 times r), and the great-circle circumference (2 times pi times r). For example, a radius of 5 gives volume about 523.598775598, surface area about 314.159265359, diameter 10, and circumference about 31.4159265359.
Which formulas does the sphere calculator use?
It uses volume = 4/3 x pi x r^3, surface area = 4 x pi x r^2, diameter = 2 x r, and great-circle circumference = 2 x pi x r, where r is the radius you enter and pi is the standard mathematical constant.
Which inputs are accepted?
Enter a radius greater than zero through 1000000000. Decimal values are accepted. Zero, negative numbers, non-numeric text, and values above the limit show a clear error instead of a result.
Do my numbers stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the value you enter.