Circle Area Calculator

Circle Area Calculator

Calculate circle area, circumference, radius, and diameter instantly with our free circle calculator. Perfect for geometry homework, engineering projects, and design work. Get accurate results with step-by-step solutions and support for any measurement input.

circle
area
circumference
Share this tool:
Common Circle Examples
Click examples to try circle area calculations instantly
1Circle Measurements
Enter any one measurement to calculate area, circumference, and all other measurements
How it works: Enter any one measurement (radius, diameter, or circumference) and the calculator will find all other measurements using the relationships: r = d/2 = C/(2π), Area = πr², C = 2πr.
Continue Your Calculators Journey
More tools you might find useful
Sphere Volume Calculator
Calculate sphere volume, surface area, and diameter
Trapezoid Area Calculator
Calculate trapezoid area with multiple methods
Cylinder Volume Calculator
Calculate cylinder volume, surface area, and dimensions
Triangle Area Calculator
Calculate triangle area with 3 different methods

🌈 Browse More Tools

All Calculator ToolsAll Tools

Complete Guide: Circle Area Calculator

Everything you need to know about using Circle Area Calculator effectively

Related Tools
More tools you might find useful
Featured
GPA Calculator
Calculate GPA from course grades and credits
Featured
Calorie Burn Calculator
Estimate calories burned from activities
Featured
Salary Tax Calculator
Determine take-home pay after taxes
Featured
Discount Calculator
Determine sale prices and savings amounts
Featured
Mortgage Calculator
Compute mortgage payments and amortization details
Featured
Loan Calculator
Analyze loan payments and interest schedules
Featured
BMI Calculator
Assess health with BMI calculations and wellness tips
Featured
Age Calculator
Determine exact age in years, months, days, hours
Related Collections
Collections that include this tool - discover more tools in these curated collections

Geometry Calculators

Essential geometry calculators for calculating areas, perimeters, and dimensions of geometric shapes. Perfect for students, engineers, architects, and anyone working with geometric calculations.

View collection

Volume Calculators

Calculate volumes of cylinders, cubes, spheres, and other 3D shapes. Essential tools for engineers, scientists, students, and anyone working with container capacities, material quantities, or three-dimensional measurements.

View collection