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Circle Circumference calculator
Circle Circumference calculator
Enter your values below and press Calculate to see your result instantly.
C = 2ΟΓ
Radius Vector (r)
Computed Absolute Circumference (C)
31.42 Units
SPHERICAL AREA (A)
78.54 UnitsΒ²
DIAMETER DEVIATION
10 Units
r=5
Calculations complete.
About the Circle Circumference calculator
Calculate the distance around a circle from its radius.
How to use the Circle Circumference calculator
- Enter the Radius (r).
- Press Calculate.
Formula and method
C = 2 Γ Ο Γ r, which is also Ο Γ d.
Worked example
A radius of 5 gives a circumference of 31.42 units and an area of 78.54.
Tips
- Use the same units for the answer as for the radius.
Frequently Asked Questions
Multiply the diameter by Ο.