# Fireman's Calculator — Pump Pressure & Friction Loss

> Pump Pressure & Friction Loss (iPhone/iPad app by Nathaniel Ocot.)

- Source: https://appshunter.io/ios/app/firemans-calculator/id6780652828 (this page in markdown: same URL + `.md`)
- Developer: [Nathaniel Ocot](https://appshunter.io/developer/6775524526)
- Category: Utilities, Reference
- Price: $12.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.4 · 34 MB
- Languages: American English, French (France), German (Germany), Japanese
- Released: 2026-11-02
- Data updated: 2026-11-10

## What is Fireman's Calculator?

BUILD YOUR RIG ONCE
Save your apparatus and their preconnected lines. Tap a line to get its pump discharge pressure, then adjust flow and floors for the call.

8 CALCULATORS
• Pump discharge pressure: single lines, wyes and siamese lines
• Friction loss
• Nozzle reaction
• Smooth bore flow
• Needed fire flow (NFA and Iowa methods)
• Relay pumping
• Standpipe / high-rise
• Tanker shuttle

SEE HOW EVERY ANSWER IS BUILT
Every result shows its breakdown and the method behind it, so you can follow the math and learn it. Optional fireground rounding rounds each result in the safe direction for its formula.

REFERENCE TABLES
Friction loss coefficients, nozzle pressures, smooth bore tips, appliance losses, elevation and a terminology glossary. Great for study and teaching, from engineer exam prep to the training room.

YOUR UNITS, YOUR LANGUAGE
English (US/Canada and UK/Australia terms), German, French and Japanese, with each country's hose and nozzle sizes. psi, kPa, bar or MPa; gpm or L/min; feet or meters.

BUY IT ONCE, KEEP IT FOREVER
No account. No internet connection. No ads, no in-app purchases and NO ONGOING SUBSCRIPTION. Nothing you enter leaves your device.

Made for study, training and reference. It doesn't replace your training, your department's SOPs or your own judgment.

To all of the other firemen in the world, much love and stay safe!
– Your crazy American firefighter friends

Every time you send this app to another firefighter you help us a lot.

## Is Fireman's Calculator safe?

Not enough ratings yet to assess Fireman's Calculator.

## Is Fireman's Calculator legit?

Fireman's Calculator has limited verification signals. The AppsHunter Legitimacy Score for Fireman's Calculator is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-11-02

No release notes.

## More apps by Nathaniel Ocot

- [Koine Companion](https://appshunter.io/ios/app/koine-companion/id6775524524)

All apps by Nathaniel Ocot: https://appshunter.io/developer/6775524526

## Related topics

[fire flow / pump pressure calculator](https://appshunter.io/ios/topics/fire-flow-pump-pressure-calculator) · [fire pump calculator](https://appshunter.io/ios/topics/fire-pump-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*