Pipe equivalent fitting length calculator

Calculate equivalent straight pipe length with your own figures.

Your numbers

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

Use equivalent straight pipe length to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Fitting K coefficient
2
Pipe inside diameter (m)
0.05
Darcy friction factor
0.025
Equivalent straight pipe length (m)
4

Try another scenario

Fitting K coefficient
2.2
Pipe inside diameter (m)
0.05
Darcy friction factor
0.025
Equivalent straight pipe length (m)
4.4
Calculation method

Calculation method

Equivalent straight pipe length (m)

Equivalent length=K D/f.

Symbols and units
a
Fitting K coefficient
b
Pipe inside diameter (m)
c
Darcy friction factor

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

  • Calculation uses the entered values and stated mathematical model; quantities must use the labelled units. 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. Equivalent length=K D/f.
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Further reading

Method reference ↗

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

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