Fire Extinguisher Calc NFPA 10

About Fire Extinguisher Calc NFPA 10

Portable fire extinguisher selection and placement per NFPA 10. Minimum rating, number of extinguishers and travel distance for any occupancy and fire class.

WHAT IT CALCULATES
- Extinguisher count from floor area and hazard class
- Class A coverage: 6000 sq ft light, 3000 sq ft ordinary, 4000 sq ft extra hazard
- Hard cap of 11,250 sq ft per extinguisher regardless of its rating
- Minimum ratings from Table 6.2.1.1: 2-A light, 2-A ordinary, 4-A extra hazard
- Travel distance limits: 75 ft Class A, C and D, 30 ft Class B and K
- Class B at 50 ft of travel doubles the rating, exactly as Table 6.3.1.1 allows
- Class B, D and K coverage derived from the travel distance, which is what the standard governs
- Class C handled as A or B after de-energizing, as the standard requires

CODE REFERENCES BUILT IN
- NFPA 10 Table 6.2.1.1 - maximum floor area per unit of A and per extinguisher
- NFPA 10 Table 6.3.1.1 - Class B ratings by hazard and travel distance
- Class K wet chemical requirement for commercial cooking areas (6.6)

HOW IT WORKS
Enter floor area, occupancy hazard and fire class. You get the minimum rating, the number of extinguishers, the area one extinguisher covers and the maximum travel distance to check on the floor plan. Square feet or square metres, your choice.

CORE FEATURES
- Works 100 percent offline, no signal needed on site
- Calculation history you can reopen and reuse
- PDF export for submittals and field records
- Light and dark themes
- English and Spanish
- US or metric units
- Material Design 3 interface

TYPICAL USES
- Counting units for a floor before the walk-through
- Verifying a contractor submittal during plan review
- Sizing during a bid walk without pulling the code book out of the truck
- Backing a field decision with a PDF you can attach to the job file
- Studying for NICET certification

WHAT THE PDF REPORT INCLUDES
- Every input you entered
- The calculated results with units
- Date and time of the calculation

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

WHO IT IS FOR
- Fire protection engineers and system designers
- Sprinkler fitters and installers
- Fire inspectors and AHJ plan reviewers
- Contractors preparing bids and submittals
- NICET candidates and fire protection students

ACCURACY NOTE
Results are a design aid, not a stamped design. Verify against the edition of the standard adopted in your jurisdiction and confirm with the authority having jurisdiction.

Part of FireTools, the fire protection calculator collection. More tools at tradetools.dev/fire