Sphere Volume Calculator
Sphere volume and surface area.
Enter your values
Enter the radius you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Volume
- 523.5988
- Surface area
- 314.1593
- Diameter
- 10
- Great circle circumference
- 31.4159
- Volume in litres (if cm)
- 0.5236
Quick answer
A sphere's volume is (4/3)πr³ and its surface area is 4πr².
V = (4/3)πr³, A = 4πr²
At a glance
| What it does | Sphere volume and surface area. |
|---|---|
| Category | Math |
| Inputs needed | Radius |
| Main output | Volume |
| Formula | V = (4/3)πr³, A = 4πr² |
| Cost | Free — no sign-up, no download |
How to use the Sphere Volume Calculator
- 1Enter the sphere's radius.
- 2Read volume and surface area.
- 3Halve the diameter if that is what you measured.
Inputs explained
- Radius
- Enter the radius you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Radius5
Results
- Volume523.5988
- Surface area314.1593
- Diameter10
- Great circle circumference31.4159
- Volume in litres (if cm)0.5236
Frequently asked questions
How do I get radius from volume?
r = ∛(3V/4π).
Why 4πr²?
It is the derivative of the volume formula with respect to radius.
What do I need to enter into the Sphere Volume Calculator?
Just 1 value: radius. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Sphere Volume Calculator work out the answer?
A sphere's volume is (4/3)πr³ and its surface area is 4πr². It applies the formula V = (4/3)πr³, A = 4πr² and shows the working so you can check each step by hand.
Is the Sphere Volume Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.