Pipe Offset Calculator
Enter the offset you need and the fitting angle to get the travel (center-to-center length of the angled piece), the run it covers along the pipe, and the pipe cut length after subtracting the fitting take-off.
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Result
Enter your numbers to see the result.
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The math
- Travel = offset ÷ sin(angle)
- Run = offset ÷ tan(angle)
- Cut length = travel − 2 × take-off
A 45° offset has a travel of 1.414 times the set, and a run equal to the set. For rolling offsets, first find the true set from the vertical and horizontal sets with the Pythagorean theorem.
Worked example
A 12 in. offset with 45° fittings has a travel of 16.97 in. and a run of 12 in. With 1 in. take-off each end the pipe is cut at 14.97 in.
Frequently asked questions
What is a rolling offset?
An offset that moves the pipe both sideways and up. Combine the two sets as the square root of (vertical² + horizontal²), then use that as the offset.
What is the offset multiplier?
The travel divided by the set: 1.414 for 45°, 2.613 for 22.5°, 2 for 30° and 1.155 for 60°.
Related calculators
This calculator gives an estimate for planning and is not tax, legal or engineering advice. Confirm code-related results against the code edition adopted in your jurisdiction and with your authority having jurisdiction, and follow the manufacturer's instructions.