FireOps CalcWhat this calculator helps with
A fire pump calculation usually starts with the desired flow and the fireground layout. FireOps Calc is designed to keep those pieces visible: hose size, hose length, flow, nozzle pressure, elevation, appliance loss, and the final required pump discharge pressure.
Attack lines
Calculate PDP for 1¾", 2", 2½", smooth bore, fog, and department-specific lines.
Supply operations
Support water supply, relay pumping, two supply lines, and receiving engine target intake pressure.
Training examples
Show students the math instead of only showing the final number.
Pump pressure formula
The basic pump pressure formula used in driver/operator training is:
Depending on the operation, nozzle pressure may be replaced by a target intake pressure, standpipe outlet pressure, master stream device requirement, or relay receiving-engine intake pressure.
Worked example
Example: 200 ft of 1¾" hose flowing 185 GPM to a 50 PSI fog nozzle with no elevation change.
| Item | Value |
|---|---|
| Hose | 200 ft of 1¾" |
| Flow | 185 GPM |
| Friction loss estimate | About 106 PSI total, if C = 15.5 |
| Nozzle pressure | 50 PSI |
| Required PDP | About 156 PSI |
FireOps Calc is useful because the same line can change quickly when the nozzle, flow, hose length, elevation, or department hose coefficient changes.
Why firefighters use it
- Faster practice for driver/operator students.
- More consistent pump math during training.
- Visual breakdowns that help instructors explain why the answer changed.
- Phone-friendly layout for station drills and quick reference.
FAQ
What is a fire pump calculator?
A fire pump calculator helps estimate pump discharge pressure using hose friction loss, nozzle pressure, appliance loss, elevation, and other fireground factors.
Is this only for training?
FireOps Calc is built for training and quick reference. Always follow your department SOPs, instructor direction, and manufacturer data.
Can I use my department hose setup?
The mobile app version is designed to support saved department hose, nozzle, and preset information so calculations match local equipment.
Related FireOps Calc pages
Run the calculation in FireOps Calc.
Use the website calculator, install the app, or keep reading the training pages to build stronger pump operator habits.