11 tools · NFPA · EN 12845 · FM
Fire protection calculators
Preliminary sizing at the desk, quick checks on site. Every tool recalculates as you type, visualises the result and shows exactly which formula it used.
Water supply
Fire Water Tank Sizing Calculator
From hazard class to tank volume: sprinkler demand, hose allowance, duration, dead volume and diameter.
Open calculator →
Hydraulics
Sprinkler K-Factor Flow and Pressure Calculator
Sprinkler flow or required pressure from Q = K·√P, with a comparison table for every K-factor and a Q–P chart.
Open calculator →
Classification
NFPA 13 Hazard Classification Tool
From occupancy to NFPA 13 class: density/area curve, sprinkler demand, hose allowance and duration.
Open calculator →
Classification
EN 12845 Hazard Class Finder
From facility type to EN 12845 class: density, area of operation, demand, duration and water volume.
Open calculator →
Layout
Sprinkler Spacing and Layout Calculator
From room size to sprinkler count: Sx × Sy spacing, coverage area, wall distance and a scaled layout plan.
Open calculator →
Classification
Sprinkler Temperature Rating Selector
From ceiling temperature to sprinkler rating: NFPA 13 class, EN 12845 +30 °C margin and glass-bulb colour.
Open calculator →
Pumps
Fire Pump NPSH Calculator
NPSHa from altitude, temperature, static height and suction loss; NPSHr margin and suction velocity check.
Open calculator →
Pumps
Diesel Fire Pump Fuel Tank Calculator
From engine power to fuel tank: NFPA 20 1 gal/hp rule, EN 12845 running time and standard tank choice.
Open calculator →
Classification
ESFR Suitability Checker
Roof slope, ceiling height, 914 mm clearance and commodity rules; 12-sprinkler + hose water demand.
Open calculator →
Conversion
Fire Protection Unit Converter
L/min–gpm, bar–psi–head, mm/min–gpm/ft², K-factor, gallons, °C–°F and kW–hp on one screen.
Open calculator →
Smoke
Smoke Vent Area Calculator (Natural Smoke Ventilation)
From fire size and smoke-free height to smoke flow, layer temperature, AᵥCᵥ and number of vents.
Open calculator →
This tool is for preliminary sizing and checking; confirm the final design against the edition of the standard in force and the authority having jurisdiction.