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Friction Loss Calculator

A simple friction-loss check using pipe length and inside diameter only.

Friction Loss Calculator

Quick Hazen-Williams friction loss using flow, pipe length, inside diameter, and C-factor.

Engineering disclaimer

Results are for preliminary engineering only. Final designs must be reviewed by a licensed fire protection engineer and verified against NFPA 13/14 and the local AHJ.

Friction loss results

Total friction loss
2.0 psi
Friction loss per foot
0.020 psi
Flow
250 GPM
Pipe length
100.0 ft
Inside diameter
4.026 in
C-factor
120