Calculate pipe travel length and true offset for rolling offsets in plumbing and HVAC.
Offset Dimensions
Travel Distance
Enter roll and set to calculate travel
About this calculator
Overview
A rolling offset occurs when a pipe changes both its vertical (roll) and horizontal (set) position. This requires a diagonal pipe length known as 'travel' to connect the offsets using specific fittings.
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Pro Tips
Remember to subtract the fitting take-out (the length of the fitting itself) from your calculated travel length.
Double-check your measurements from the center of each pipe for highest accuracy.
Use a line level or laser level to accurately measure the 'roll' (vertical change).
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Fun Facts
"The multiplier for a 45° fitting is the square root of 2 (≈ 1.414)."
"Rolling offsets are common in tight mechanical rooms where pipes must dodge obstacles."
"The term 'set' usually refers to the horizontal displacement, while 'roll' is the vertical."
