Geometry Calculator
Calculate area, perimeter, volume, and surface area for various shapes.
Shape Calculator
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Circle
78.5398
Area (square units)
AArea
78.5398
PPerimeter
31.4159
dDiameter
10
Formulas
Area = π × r²
Circumference = 2 × π × r
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Handbook of Mathematical Functions
by Abramowitz & Stegun
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.