Circle Calculator
Calculate area, circumference, and diameter of circles
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How to Use This Calculator
Radius.
Get Area/Circum.
Understanding Circle Calculations
Pi.
Area vs Perimeter.
Cylinders.
Layout.
Formula & Calculations
Area = pi x r^2
Circum = 2 x pi x r
Key Factors to Consider
Center point
Diameter
Unit consistency
Accuracy
Frequently Asked Questions
1Area formula?
pi * r squared.