K-factor calculator
Solve Q = K√P. Leave the field you want — flow, K or pressure — blank.
What this determines. This finds the missing number in Q = K√P: flow from a known K and pressure, the K of a nozzle or orifice from a test, or the pressure you need for a given flow.
Your readings
Which units?
Use a consistent set — for example L/min and bar, or L/s and kPa. Mixing them produces a K that will not travel.
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Convert a pitot pressure and nozzle diameter into flow.
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Project the flow available at the residual pressure the design asks for.
Pressure and flow unit converter
kPa, bar, psi, metres of head. L/min, L/s, m³/h, gpm.
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Discharge minus suction, in metres of head.
Flow test discharge volume
Flow times duration — litres on the driveway.
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