Pipe Slope Calculator
Calculate pipe slope, fall, or horizontal run using Imperial or metric measurements.
Choose what to solve for, then enter the two known measurements. Results update automatically.
Vertical distance from upstream to downstream.
Horizontal distance covered by the pipe.
%
Enter slope as a percentage.Pipe Slope
Slope
—%
Enter values to calculate.
Fall / drop—
Horizontal run—
Slope—
Slope per foot—
Grade—
Ratio—
How to Use the Calculator
- Select whether to calculate slope, fall, or horizontal run.
- Choose Imperial or Metric units.
- Enter the two known values. The result updates automatically.
- Use Reset Calculator to clear the inputs.
Assumptions and Limitations
This calculator uses horizontal run and vertical fall to calculate geometric slope. It does not determine whether a slope meets local plumbing code. Required drainage slope depends on pipe diameter, application, and local regulations; confirm requirements with the applicable plumbing code or a qualified professional.
