{"success":true,"data":{"title":"Area of Circle - Calculator, Formula & Examples | Free Online Tool","description":"Area of circle calculator using formulas A = πr², A = πd²/4, and A = C²/4π. Calculate area of a circle instantly from radius, diameter, or circumference with step-by-step solutions.","keywords":["area of circle","area of circle calculator","area of circle formula","how to find area of circle","how to calculate area of circle","circle area","πr²","πr squared","area of a circle","circle area calculator"],"url":"https://areaofcircle.com","type":"EducationalApplication","formulas":[{"name":"Using Radius","formula":"A = πr²","description":"Square the radius and multiply by π. The most common method.","inputType":"radius"},{"name":"Using Diameter","formula":"A = πd²/4","description":"Square the diameter, multiply by π, then divide by 4.","inputType":"diameter"},{"name":"Using Circumference","formula":"A = C²/(4π)","description":"Square the circumference and divide by 4π.","inputType":"circumference"}],"features":["Calculate area from radius using A = πr²","Calculate area from diameter using A = πd²/4","Calculate area from circumference using A = C²/4π","Step-by-step solutions","Visual representations","Real-world examples","15+ decimal precision","No registration required","Free and open access"],"schemaType":"WebApplication","lastUpdated":"2026-04-27T11:47:58.946Z"}}