Fire Extinguisher Calculator – How Many Extinguishers Do I Need?
In order to be certain how many extinguishers you require you should have a fire risk assessment carried out by Staines Safety Services Ltd to make sure that there are no other factors or hazards that could affect the number of extinguishers that you require.
For most office or domestic environments, the correct Fire extinguishers is rated as Class A. This makes it suitable for flammable solids e.g paper, wood etc. Our calculator below uses the British Standard 5306 formula for calculating the number of class A extinguishers needed which roughly equates to one 13A extinguisher covering 200 square meters.
The fire rating is found by multiplying the floor area in metres squared (m²) by 0.065. Therefore for a floor area of 200m² the fire rating is 200 x 0.065 = 13A.
A 9 litre water extinguisher has a fire rating of 13A, therefore one 9 litre water extinguisher will be required for every 200m² of floor area.
For special risks such as fires involving live electrical equipment, a suitable extinguisher should be provided – carbon dioxide or dry powder, within close distance of the risk (or at least within 30m) usually placed next to the water extinguishers required.
These are estimates only and advice should always be sought from a qualified and competent engineer.
Please use the calculator below to ascertain the number of fire extinguishers needed
We estimate you will need # fire extinguishers.