Circle Calculator
Free online circle calculator. Area, circumference, diameter from radius. Accurate and easy to use.
Radius
5.000000
r = 5
Diameter
10.000000
d = 2r = 2 × 5 = 10
Circumference
31.415927
C = 2πr = 2 × π × 5 = 31.4159265359
Area
78.539816
A = πr² = π × 5² = 78.53981633974999
Intermediate steps
d = 2 × 5 = 10
C = 2 × π × 5 = 31.4159265359
A = π × 5² = 78.53981633974999
Embed this tool
Copy and paste the code below into your website to embed this tool for free. An attribution link to The Util Box is required.
<iframe src="https://www.theutilbox.org/embed/circle-calculator" width="600" height="500" frameborder="0" style="border: none; max-width: 100%;" title="Free circle calculator tool from The Util Box"></iframe>