Rolling Offset Calculator

Calculate pipe travel length and true offset for rolling offsets in plumbing and HVAC.

Offset Dimensions

Roll (Vertical Offset)

Set (Horizontal Offset)

Travel Distance

Enter roll and set to calculate travel

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).

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."

Formula: True Offset = √(Roll² + Set²) Travel = True Offset × Multiplier (e.g., 1.414 for 45°)

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