Mar 21, 2025 · Use this free circumference calculator to find the area, circumference and diameter of a circle.

Circumference of a Circle Calculator. Use this calculator to easily calculate the circumference of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc. If you know the diameter, first divide it by two to get the radius.

Feb 6, 2024 · Calculate the area, circumference, radius and diameter of circles. Find A, C, r and d of a circle. Given any 1 known variable of a circle, calculate the other 3 unknowns.

To check your results, input the 8 cm radius in the calculator. The results should also be 50.265 cm and 201.06 cm². How are the circumference and area of a circle related? They relate to each other by the following formula: c = 2√ (πA).

This calculator will calculate the circumference of a circle given its diameter, using the famous formula circumference = pi times d. It supports different units such as meters, feet, and inches. Just type into the box and hit the calculate button.

4 days ago · Use π (pi) ≈ 3.1416 unless your calculator has a π button. 📊 Example 1: Using Radius. Let’s say your circle has a radius of 7 cm: Circumference = 2 × π × 7 = 2 × 3.1416 × 7 ≈ 43.98 cm 📏 Example 2: Using Diameter. If the diameter is 10 cm: Circumference = π × 10 ≈ 31.42 cm. Simple, right? 🔢 Circumference Calculator

Use our simple calculator to find the circumference of a circle. Learn how to solve circumference problems with our step-by-step guide.

Use our simple calculator to find the area, circumference, diameter, and radius of a circle. Learn how to solve circle problems with our step-by-step guide.

The circle calculator finds the area, circumference, radius or diameter of a circle based on a single known value.

Circumference: the distance around the circle, or the length of a circuit along the circle. Chord: a line segment from one point of a circle to another point. A chord that passes through the center of the circle is a diameter of the circle.