Fire Pump Sizing Calculator

Size fire pumps for flow, pressure, and horsepower per NFPA 20.

System Type

System Demand (GPM)

Hose Demand (GPM)

Required Pressure at BOR (PSI)

Base of Riser pressure needed

Static Water Pressure (PSI)

Residual Pressure at Flow (PSI)

From hydrant flow test

Pump Type

Driver Type

GPM	40 PSI	75 PSI	100 PSI	125 PSI
250	7.5 HP	15 HP	20 HP	25 HP
500	15 HP	30 HP	40 HP	50 HP
750	25 HP	50 HP	60 HP	75 HP
1000	30 HP	60 HP	75 HP	100 HP
1500	50 HP	100 HP	125 HP	150 HP
2000	60 HP	125 HP	150 HP	200 HP

Fire Pump Requirements