Radius Calculator!

Radius Calculator allows you to calculate the radius, central angle, arc length, and circumference from the span / chord and rise of an arc segment. Built-in unit converter makes it to work with any length unit (including inches, feet, centimeters, meters, and many more).Simply enter the span / chord and the rise to arc in your choice of units. This method is very accurate for small angles and about 10% off on large angles approaching 180 degrees.