Fire Extinguisher Selection Calculator

Determine portable fire extinguisher requirements, sizing, and placement per NFPA 10.

Primary Fire Hazard Class

Occupancy Type

Floor Area (sq ft)

Number of Floors

Flammable Liquid Area (sq ft) Enter area with Class B hazards (if any)

Special Equipment

Electrical/Computer Rooms Commercial Kitchen Combustible Metals

Class A Hazard	Min Rating	Max Area	Max Travel
Light	2-A	6,000 sq ft	75 ft
Ordinary	2-A or 3-A	3,000-6,000 sq ft	75 ft
Extra	4-A	4,000 sq ft	75 ft

Fire Extinguisher Classes

Wood, paper, cloth, rubber, plastics. Use water, foam, or dry chemical extinguishers.

Gasoline, oil, grease, paints, solvents. Use CO2, dry chemical, or foam. Never use water.

Cooking oils and fats in commercial kitchens. Wet chemical agents create a cooling foam blanket.