Fire Extinguisher Calculator

Units Square feet (ft²) Square meters (m²)

Floor Area

Hazard Class Light Hazard Ordinary Hazard Extra Hazard

Fire Extinguisher Estimator

Not sure how many extinguishers you need for your building? This tool gives you a quick estimate based on floor area and hazard type.

It uses NFPA 10 spacing guidelines as a rough rule-of-thumb:

• Light hazard: 1 extinguisher (2A rating) per 3000 ft² (279 m²)

• Ordinary hazard: 1 extinguisher per 1500 ft² (139 m²)

• Extra hazard: 1 extinguisher per 1000 ft² (93 m²)

🔧 How to Use:

1. Select your unit (Square Feet or Square Meters).

2. Enter your floor area.

3. Choose the hazard class (Light, Ordinary, or Extra).

4. The calculator will show the recommended number of extinguishers.

⚠️ Note: This is only an estimate. Always consult NFPA 10 or your local fire code for exact requirements.