Terms of the offer
From clear definitions and real-life examples to FAQs and a quick quiz, explore everything you need to know about diameter in this guide. If you're wondering how to calculate the diameter of a circle, this diameter of a circle calculator is a perfect choice. You will need either the radius, the circumference, or the area of a given circle for the calculations. Take a look at the picture above the calculator to visualize each element. DIAMETER definition: 1. (the length of) a straight line that reaches from one point on the edge of a round shape or…. Learn more. In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius.
