Insert the information in the form and the calculator will determine the sagitta of an arc.

What is the sagitta of an arc?

The sagitta of an arc (sag) is the distance from the center of the circular arc to the center of it's base. It's name comes from Latin sagitta which means an arrow.

How to calculate sagitta of an arc?

To calculate sagitta of an arc you should use the following formula:
sagitta of an arc = r - √(r² - L²)
where:
r = radius of arc
L = chord's base length

Why use sagitta of an arc formula?

The sagitta of an arc is used for calculating the arc that is necessary to span a specific height and idstance, It is also used to find the depth of a spherical mirror or lens.