Formula Wizard

Fahrenheit to Centigrade Ohm's Law
Power Factor Three-Phase kW
Single-Phase kW Water Valve Sizing
Air Velocity Steam Valve Sizing

Enter known values in a calculator table leaving only one field empty, click "Calculate" to determine the remaining item.
Temperature Conversions
°F °C
Fahrenheit Centigrade
 
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Ohms Law (DC)
E I R
Voltage Current (in Amps) Resistance
 

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Power Factor (AC)
PF KW KVA
Power Factor KW (Real Power) KVA (Total Power)
 

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Three Phase
KW I E PF
KW (Real Power) Current Voltage Power Factor
 

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Single Phase
KW I E PF
KW (Real Power) Current Voltage Power Factor
 

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Water Valve Sizing
Cv GPM *P
Flow Coefficient Gal Per Min Pressure (in PSI)
 

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Air Velocity (PITOT)
AV Pv
Air Velocity Pressure
AV in:   

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Two-Position
Delta Pressure = Inlet Pressure x 10%
Modulating
Low Pressure system (<15), Delta Pressure = Inlet Pressure x 80%
High pressure system(>15), Delta Pressure = Inlet Pressure x 42%
Steam Valve Sizing
Cv Lbs/Hr *P Pi (PSIG)
Flow Coefficient Pounds per hour Pressure Drop (required) Inlet Pressure (required)

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