Ideal Pipe Flow and Head-loss Calculator

How to use Ideal Pipe Flow and Head-loss Calculator

Velocity is volumetric flow divided by circular area. Reynolds number isρvD/μ. Entered Darcy friction factor gives pressure loss f(L/D)ρv²/2, with head loss ΔP/(ρg).

1. Enter pipe diameter (m), volumetric flow (m³/s), pipe length (m), density (kg/m³), dynamic viscosity (pa·s), user darcy friction factor, user gravity (m/s²).
2. Choose the stated convention and check the units and supported model.
3. Calculate, inspect the result, then copy or download it.

Good to know

• Positive diameter,length,density,viscosity,gravity; nonnegative flow and Darcy factor. SI units, incompressible ideal single pipe only. No inferred friction factor, multiphase flow or system certification.
• Runs locally. Text/JSON fields are capped at30,000 characters; stricter page-specific and numeric-string limits also apply. Numeric inputs are bounded to magnitude1e15 and nonzero magnitude at least1e-100 unless an exact-string mode states otherwise. Approximate summaries use12 significant digits; CSV numeric cells retain the complete stored value and potentially formula-like string cells gain a protective apostrophe; unsupported, non-finite or detected underflow states return an error.