SprinkCalc Pro: Fire Sprinkler
NFPA 13 Hydraulic Calculator
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Fire sprinkler calculators built for NFPA 13 design: Hazen-Williams, K-factor, density, standpipe & antifreeze. 100% offline — for FP engineers, fitters & NICET pros.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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.
The developer, Ersel Tarhan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
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- Purchases
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ersel Tarhan
- Size
- 18.6 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 34 more
- English, Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Filipino, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Annual Premium $19.99
- Weekly Premium $1.99
- Copyright
- © 2026 Ersel Tarhan