KalkulatorPro

Pipe Slope Calculator

invert 1 [m a.s.l.]

invert 2 [m a.s.l.]

L [m]

i [%]

Pipe Elevation Calculator

elev. 1 [m a.s.l.]

elev. 2 [m a.s.l.]

Length [m]

Distance from manhole 1 [m]

Engineering calculators have been developed based on technical literature

The information on the website is for informational purposes only. Calculation results should be interpreted by the designer. The information contained in the service does not constitute technical advice. The user is responsible for all decisions, selections or solutions based on calculation results.

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Calculating channel slopes

Slope calculation formula:

S = (H1 - H2) / L * 100%
Where:
S - Slope [%]
H1 - Initial elevation [m a.s.l.]
H2 - End elevation [m a.s.l.]
L - Horizontal length [m]

Minimum slopes for gravity channels

For sewer networks, the minimum slope is most commonly taken as the inverse of the diameter, i.e., 1/DN. For example, for a DN200 pipe, it is 1/200, which is 0.5% (5‰).

Pipe diameter DN [mm]	Minimum slope [%]
150	0,67
200	0,5
250	0,4
300	0,33