This calculator gives the minimum number of portable fire extinguishers for each floor, the rating to look for and how far anyone should have to walk to reach one. Pick the US method (NFPA 10 and OSHA 1910.157) or the UK method (BS 5306-8:2023), enter the floor area of one floor and the number of floors, and tick the kinds of fire risk you have. The working is shown under the result so you can check it.
In the US method, each extinguisher can only cover so much floor. For Class A (wood, paper, cloth) the limit is the A rating multiplied by 3,000, 1,500 or 1,000 sq ft for light, ordinary or extra hazard, and never more than 11,250 sq ft for one extinguisher. The floor area divided by that figure, rounded up, is the minimum number, and nobody should be more than 75 ft from one. Class B (flammable liquids) is set by travel distance of 30 or 50 ft depending on the rating, and Class K (cooking oils) is 30 ft. Class C (electrical) follows the A or B pattern. The UK method asks for a total Class A rating of 0.065 times the floor area in m2 per storey, with at least 26A and at least two extinguishers on storeys over 50 m2, and then divides that by the rating you plan to buy, such as 13A or 21A. Travel distance is 30 m for Class A and 10 m for Class B and F.
The count is a minimum based on area. It does not know your walls, doors and partitions, so walk each floor and add extinguishers where anyone would be beyond the travel distance. The result is not a fire risk assessment. Check it against your own assessment, the extinguisher labels and a competent fire safety adviser.
Fire Extinguisher Placement Calculator
Minimum number, rating and travel distance per floor. Results update as you type.
Estimate only. Confirm with the equipment manufacturer’s instructions and a competent person before use.
Benefits
- Saves Time: Instead of manually researching placement rules, users receive instant results.
- Increases Safety: Proper extinguisher placement reduces response time during a fire, protecting lives and property.
This calculator provides a straightforward approach to fire extinguisher placement, making fire safety planning more accessible and effective.
Frequently Asked Questions (FAQs)
1. What is the purpose of this calculator?
To determine the number and placement of fire extinguishers for a given area.
2. How does the calculator work?
It calculates the required number of extinguishers based on area size and hazard type.
3. Is this calculator free to use?
Yes, it’s completely free.
4. Can I use this for commercial buildings?
A competent fire-safety assessment is required for your premises.
5. What hazard types are supported?
It supports Class A, B, C, and K hazard categories.
Disclaimer:
This tool is provided for general guidance and informational purposes only. It is intended to help you assess the approximate number and placement of fire extinguishers in your space. However, it is not a substitute for professional safety assessments or local fire code requirements. Users are encouraged to consult fire safety professionals and refer to relevant regulatory standards to ensure full compliance and proper safety measures.