Sprinkler K-Factor Calculator

Unit System US (gpm / psi) Metric (lpm / bar)

Solve For K-Factor Flow (Q) Pressure (P)

Provide any two values to solve the third

K-Factor

US: gpm/√psi • Metric: lpm/√bar

Flow (Q)

Pressure (P)

Sprinkler K-Factor Calculator

This tool lets you calculate Flow (Q), Pressure (P), or the Sprinkler K-Factor if you know any two values.

The formula is:

Where:

• Q = Flow rate (GPM or LPM)

• K = K-Factor (sprinkler discharge coefficient)

• P = Pressure (PSI or bar)

🔧 How to Use:

1. Select your unit system (US: GPM/PSI, Metric: LPM/Bar).

2. Choose what you want to solve for (K, Q, or P).

3. Enter the other two known values.

4. The calculator will automatically solve for the missing variable.

⚠️ Disclaimer: This is a simplified tool. Always check manufacturer’s data, NFPA standards, and hydraulic calculations before final design.