Radius & Chord

Calculated Result
0.0000
Arc Geometry Reference
Chord (C) Height (H) Radius (R)

This calculation is commonly used in inspection when measuring a large radius. By placing a straight edge (or gauge pins) across the curve to establish a Chord (C), you can use a depth micrometer to measure the Segment Height (H) and calculate the true Radius (R).

Formulas Used
R = (C² / 8H) + (H / 2)
C = 2 × √(2HR - H²)
H = R - √(R² - (C/2)²)