Drain Pipe Slope Calculator
Calculate the slope needed for proper drainage in plumbing or landscaping.
Verify slope requirements with local building regulations.
Examples
- 50 ft run, 12 in drop ⇒ 2 %
- 40 ft run, 6 in drop ⇒ 1.25 %
- 80 ft run, 20 in drop ⇒ 2.08 %
FAQ
Why convert run to inches?
Slope uses consistent units for rise over run.
What slope is typical?
Most drains require 1–2% slope for flow.
Does pipe diameter matter?
This calculation ignores diameter; check local codes.
Additional Information
No additional information available.