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Free, accurate engineering calculators for boiler feed pumps, pump sizing, HVAC, steam and more. Formulas, worked examples, and expert guides.
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Boiler Feed Pump
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Boiler Feed Pump Calculation
Estimate boiler feedwater design flow, system head, and pump power with IF97 liquid-water properties.
Pump Sizing Calculator
Size a centrifugal pump: hydraulic power, brake power and motor kW from flow, head and efficiency.
NPSH Available Calculator
Compute NPSH available to protect a pump from cavitation using pressure, temperature and suction geometry.
HVAC Cooling Load Estimator
Estimate a room's cooling load (BTU/hr and tons) from area, occupants, lighting, equipment and climate.
Boiler Size Calculator
Size a steam boiler in BHP, BTU/hr and kW from steam demand, pressure and feedwater temperature.
BFP Efficiency Calculator
Measure the real-world efficiency of a boiler feed pump from field data: flow, differential pressure and shaft power.
Steam Flow Calculator
Estimate steam mass flow through a pipe from pressure, pipe size and velocity — quick sanity check for steam distribution.
Pipe Friction Loss Calculator
Compute Darcy–Weisbach friction head loss for water flow through a pipe — includes fittings equivalent length.
Cooling Tower Makeup Water Calculator
Estimate cooling tower makeup water: evaporation, blowdown, drift and total consumption from range, flow and cycles of concentration.
Condensate Return Calculator
Estimate vented flash steam, returned condensate, and fuel savings from a saturated-condensate recovery system.
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Guides that teach
Deep-dive articles cover pump sizing, NPSH, HVAC load, and boiler feedwater.