Fire Extinguisher Calculator
Portable fire extinguishers are the most common type of fire fighting equipment to be found in commercial and industrial premises. However, in order to be compliant with fire safety law, the overall number of extinguishers you require is dependent upon the size of your premises.
The fire extinguisher calculator is a tool designed to work out how many extinguishers your workplace requires, by area, in order to comply with fire safety legislation.
Use our free fire extinguisher calculator below to determine how many extinguishers you need:


There were 13,134 non-residential fires attended by the Fire and Rescue Service in 2024/25 – consistent with recent trends.