3 calculators in this category
- Circle Area CalculatorEnter whichever circle measurement you have — radius, diameter, circumference or even the area itself — and this…
- Circumference CalculatorCircumference is the distance once around a circle, and it is one multiplication from the diameter: C = πd. This calculator…
- Arc Length CalculatorArc length is the distance measured along a curve rather than across it, and it is one multiplication away once the angle is in…
Which one do you need?
- Circle Area Calculator
- Calculate the area of a circle from the radius, diameter or circumference, and back-solve the radius from a known area, with each arithmetic step shown.
- Circumference Calculator
- Find the circumference of a circle from its diameter, radius or area, or convert a wrapped tape measurement back to diameter for round stock and wheels.
- Arc Length Calculator
- Compute circular arc length from radius and central angle in degrees or radians, or back-solve the angle or radius, with chord and sector area included.