# Sprinkler Hydraulic Calc — NFPA 13 Sprinkler Demand

> NFPA 13 Sprinkler Demand (iPhone/iPad app by Rizvan Adzhoian.)

- Source: https://appshunter.io/ios/app/sprinkler-hydraulic-calc/id6801172872 (this page in markdown: same URL + `.md`)
- Developer: [Rizvan Adzhoian](https://appshunter.io/developer/1891746079)
- Category: Utilities, Business
- Price: $0.99
- Age rating: 17+
- Requires: iOS 13.0 · 31 MB
- Languages: American English
- Released: 2026-08-20
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/sprinkler-hydraulic-calc/id6801172872/reviews.md

## What is Sprinkler Hydraulic Calc?

Sprinkler Hydraulic Calc helps fire protection professionals calculate sprinkler system demand using the NFPA 13 density/area method. Built for fire protection engineers, designers, and inspectors working on commercial and industrial projects.

WHAT IT CALCULATES
- Sprinkler demand (gpm) using density/area method
- K-factor flow at any pressure (Q = K * sqrt(P))
- Number of operating sprinklers from design area and coverage
- Total system demand including hose stream allowance
- Density and design area from NFPA 13 curves

NFPA 13 COMPLIANT
All calculations follow NFPA 13 (current edition) density/area curves, K-factor table, and hose stream demand requirements. Built-in lookup tables for Light, Ordinary Group 1 & 2, and Extra Hazard Group 1 & 2 occupancies.

HAZARD CLASSIFICATIONS
- Light Hazard (LH)
- Ordinary Hazard Group 1 (OH1)
- Ordinary Hazard Group 2 (OH2)
- Extra Hazard Group 1 (EH1)
- Extra Hazard Group 2 (EH2)

FEATURES
- Works 100% offline
- Save calculations to history
- Export professional PDF reports
- English and Spanish (en/es)
- Light and dark themes (in-app purchase)
- Material Design 3 interface
- Override individual parameters (density, heads count, hose demand, coverage)

PRO VERSION ($2.99)
Remove ads, get unlimited calculations, and unlock dark theme.

PART OF FIRETOOLS SUITE
Sprinkler Hydraulic Calc is part of the FireTools collection of professional calculators for fire protection specialists.

Contact: support@tradetools.dev
Privacy: https://tradetools.dev/privacy-policy.html

OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Unlimited saved calculation history
- PDF export of results
- Dark theme
- Ad-free experience


## Version history (last 1 release)

### 1.0.1 — 2026-08-20

No release notes.

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All apps by Rizvan Adzhoian: https://appshunter.io/developer/1891746079

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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 2026-09-08.*