# SprinkCalc Pro: Fire Sprinkler — Fire Protection Calculator > Fire Protection Calculator (iPhone/iPad app by Ersel Tarhan.) - Source: https://appshunter.io/ios/app/sprinkcalc-pro-fire-sprinkler/id6761716466 (this page in markdown: same URL + `.md`) - Developer: [Ersel Tarhan](https://appshunter.io/developer/1093545232) - Category: Productivity, Reference - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 18 MB - Languages: Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, English, Finnish, French and 24 more - Released: 2026-04-10 - Data updated: 2026-07-01 - User reviews in markdown: https://appshunter.io/ios/app/sprinkcalc-pro-fire-sprinkler/id6761716466/reviews.md ## What is SprinkCalc Pro? SprinkCalc Pro turns your iPhone into a complete fire sprinkler hydraulics toolkit for fire protection engineers, sprinkler fitters, and contractors who can't trust spotty Wi-Fi on the job site. Get accurate Hazen-Williams friction loss, K-factor discharge, NFPA design area, system volume, hose stream allowance, and antifreeze concentration calculations — all in one app, 100% offline. Designed for NICET certified professionals, fire protection engineers, and sprinkler system designers who need fast, reliable calculations in the field or at the desk. Every calculation runs on-device with zero connectivity required. SPRINKLER CALCULATORS: • Hazen-Williams Calculator — Calculate friction loss in fire sprinkler piping using the Hazen-Williams equation. Supports all standard pipe sizes, C-factors for steel, copper, CPVC, and cement-lined pipe. Essential for every hydraulic calculation. • K-Factor Calculator — Calculate sprinkler discharge flow rate from K-factor and residual pressure. Covers standard spray (K-5.6), large drop (K-11.2), ESFR (K-14.0 to K-25.2), and all NFPA listed K-factors. Instantly verify sprinkler performance. • Design Area Calculator — Determine the required design area and water density based on NFPA 13 hazard classifications. Supports Light Hazard, Ordinary Hazard Group 1 & 2, Extra Hazard Group 1 & 2, and ESFR configurations. • System Volume Calculator — Calculate the total water volume in fire sprinkler piping systems. Enter pipe sizes, lengths, and fitting counts to get precise gallons/liters for system volume. Critical for antifreeze systems, dry systems, and pre-action systems. • Hose Stream Allowance Calculator — Determine the required hose stream allowance based on NFPA 13 occupancy classification. Ensures your water supply meets the total demand including inside and outside hose streams. • Antifreeze Concentration Calculator — Calculate the correct glycerin or propylene glycol concentration for antifreeze fire sprinkler systems. Temperature-based lookup per NFPA 13 requirements. Verify freeze protection levels instantly. REFERENCE GUIDES: • NFPA Standards Reference — Quick reference for NFPA 13 (Installation), NFPA 14 (Standpipes), NFPA 20 (Fire Pumps), NFPA 24 (Underground Mains), and NFPA 25 (Inspection & Testing). Key requirements at your fingertips. • Pipe Schedule Reference — Complete pipe schedule tables for Schedule 10, 40, and steel/copper piping used in fire sprinkler systems. Inside diameters, wall thickness, and C-factors for all standard sizes. • Sprinkler Types Reference — Visual guide to sprinkler head types including pendant, upright, sidewall, concealed, ESFR, and residential. Temperature ratings, K-factors, coverage areas, and application guidelines. BUILT FOR THE FIELD: • Calculation History — Recent calculations saved automatically. Review and compare past results across projects. • Unit Toggle — Switch between Imperial (US) and Metric (SI) units with one tap. PSI/bar, GPM/LPM, feet/meters, inches/mm. • Dark Mode — Full dark/light mode support for any environment. • 100% Offline — No internet required. Every calculation and reference runs entirely on-device. Use it on the construction site, in the riser room, or at your desk. WHO IS THIS FOR: • Fire Protection Engineers (PE/NICET) • Sprinkler Fitters & Journeymen (UA Local unions) • Fire Sprinkler Contractors & Designers • Building Inspectors & Plan Reviewers • Insurance Underwriters & Risk Engineers • Fire Safety Consultants • Mechanical Engineers working on fire protection Built for fire protection professionals by people who understand the industry. SprinkCalc Pro uses NFPA standard formulas and industry-accepted calculation methods — not guesswork. From apprentice to senior engineer, this is the fire sprinkler calculator that belongs in your pocket. Terms of Use (EULA): https://sprinkcalcpro.volvoxmobile.com/terms Privacy Policy: https://sprinkcalcpro.volvoxmobile.com/privacy ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Weekly Premium | $1.99 | per 7 days | | Annual Premium | $19.99 | per year | ## Version history (last 3 releases) ### 1.0.2 — 2026-05-31 What's New in SprinkCalc Pro 1.0.2: • NFPA 13 Hydraulic Focus — Sharper alignment with NFPA 13 design workflows • Standpipe & Density References — Quicker lookups for designers • Localization Polish — Refined translations across 22 languages • Stability Improvements — Performance and bug fixes Built by fire protection pros, for fire protection pros. ### 1.0.1 — 2026-05-08 What's New in SprinkCalc Pro 1.0.1: • Refined Calculations — Improved precision across Hazen-Williams, K-factor, NFPA design area & antifreeze • Smoother Experience — Faster app launch and cleaner result screens • Localization Polish — Refined translations across 22 languages • Bug Fixes — Stability and performance improvements Built by fire protection pros, for fire protection pros. ### 1.0.0 — 2026-04-10 No release notes. ## More apps by Ersel Tarhan - [Vpn Nsfw](https://appshunter.io/ios/app/vpn-nsfw/id1503332751) - [Trackly](https://appshunter.io/ios/app/trackly/id1504660612) - [Judgr: AI Detector & Humanizer](https://appshunter.io/ios/app/judgr-ai-detector-and-humanizer/id6740828809) - [WeldCalc Pro - Welding Calc](https://appshunter.io/ios/app/weldcalc-pro-welding-calc/id6759536437) - [CoatInspect Pro - Coating Calc](https://appshunter.io/ios/app/coatinspect-pro-coating-calc/id6761478001) All apps by Ersel Tarhan: https://appshunter.io/developer/1093545232 ## Related topics [sprinkler fire](https://appshunter.io/ios/topics/sprinkler-fire) --- *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 2026-07-01.*