Diameter To Radius
Convert any circle diameter to its radius instantly. Free online geometry converter for students and professionals -- radius = diameter/2.
About This Calculator
The Diameter to Radius Converter instantly converts the diameter of any circle to its radius. The radius is half the diameter: r = d/2. This tool is useful for geometry students, teachers, and anyone working with circles who needs quick diameter-to-radius conversions.
Frequently Asked Questions
How do you convert diameter to radius?
Divide the diameter by 2 to get the radius: r = d/2.
What is the relationship between radius and diameter?
The diameter is twice the radius: d = 2r. The radius is half the diameter: r = d/2.
How do you find circumference from radius?
The circumference C = 2pir = pid.
Is this converter free?
Yes, all calculators on Calculy are completely free to use.