Arc length calculator

Input Parameters

in
in
in

Formulas Used

  • Bend radius r = l²/(8h) + h/2
  • Central angle θ = 2 * cos(1 - h/r)
  • Arc length s = r * θ
  • Inner radius Ri = r - t/2
  • Outer radius Ro = r + t/2
Chord = 4.00 in R = 2.90 in Sagitta = 0.80 in Scale: 102.7 px = 1 in | θ = 87.2° | Arc = 4.41 in

Results

Bend radius (R): 2.900 in (73.66 mm)
Arc length (s): 4.414 in (112.11 mm)
Inner radius (Ri): 2.837 in (72.07 mm)
Outer radius (Ro): 2.962 in (75.25 mm)
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