Free online calculator
Rolling Offset Calculator
Compute a 3D rolling offset in seconds — true offset, travel, run and roll angle from your rise, set and fitting angle.
How it works
- True offset = √(rise² + set²)
- Travel = offset ÷ sin(angle)
- Run = offset ÷ tan(angle); Roll = atan(set ÷ rise)
Worked example
Rise 300 mm, set 200 mm, 45° → offset ≈ 360.6 mm, travel ≈ 509.9 mm, roll ≈ 33.7°.
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Reference tool — always validate against project specs. Not a substitute for a qualified engineer.