Hazen-Williams water loss calculator

Calculate empirical water head loss with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use empirical water head loss to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Water flow (m³/s)
0.005
Pipe length (m)
100
Inside diameter (m)
0.1
Hazen–Williams C
120
Empirical water head loss (m)
0.611524

Try another scenario

Water flow (m³/s)
0.0055000000000000005
Pipe length (m)
100
Inside diameter (m)
0.1
Hazen–Williams C
120
Empirical water head loss (m)
0.729579
Calculation method

Calculation method

Empirical water head loss (m)

SI Hazen–Williams h=10.67 L Q^1.852/(C^1.852 D^4.8704).

Symbols and units
a
Water flow (m³/s)
b
Pipe length (m)
c
Inside diameter (m)
d
Hazen–Williams C

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Empirical water formula; no nonwater fluids, temperature correction or fire-system compliance. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Empirical water formula; no nonwater fluids, temperature correction or fire-system compliance.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.