Geometric Computation
Circle
Chord Length
from Radius & Sagitta
Enter radius and sagitta — receive the chord length
Diagram
Known Values
Radius
r
Radius of the circle
Sagitta (gap from chord to arc)
h
Perpendicular distance from chord midpoint to the nearest arc point
Chord Length
—
units
Formula:
L = 2√(2rh − h²)
How It Works