Electric Calcs
Simplified Electrical Calculations for Sophisticated Results
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Basic
AC Power - 3 Phase Power
AC - 3 Phase KW
AC - 3-Phase HP
AC - 3-Phase KVA
AC Power - Single Phase
AC - Single Phase HP
AC - Single Phase KVA
AC - Single-Phase KW
Basic Circuits
Capacitance
DC Power
DC - HP
DC - Power KW
Impedance
Impedance, Resistance and Reactance
Impedance, Resistance, Inductive Reactance and Capacitive Reactance
Impedance, Volts and Amperes
Ohm's Law
Ohm's Law - Amps, Volts & Ohms
Ohm's Law - Amps, Watts & Ohms
Ohm's Law - Amps, Watts & Volts
Ohm's Law - Watts, Volts & Ohms
Reactance
Capacitive Reactance, Frequency and Capacitance
Inductive Reactance, Frequency and Inductance
Temperature
Celsius or Fahrenheit
Transformers
Apparent Power (Voltamperes) in Three-Phase Transformers
Real (True) Power in Three-Phase Transformers
Transformer Turns Ratio - Current and Turns
Transformer Turns Ratio - Volts and Current
Transformer Turns Ratio - Volts and Turns
Voltage Drop
Voltage Drop - Single phase Aluminum 75C
Voltage Drop - Single phase Copper 75C
Voltage Drop - Single phase, with Known Resistance
Voltage Drop - Three phase Aluminum 75C
Voltage Drop - Three phase Copper 75C
Voltage Drop - Three phase, with Known Resistance
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AC Power - Single Phase
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AC - Single Phase HP
AC Single Phase for Horsepower, Voltage, Efficiency, or Power Factor
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Equation
Short
Long
Input 4 of 5 variables to solve for the unknown.
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Symbol
Variable
Input
Units
I
Current
amperes
kiloamperes
milliamperes
HP
Horsepower
horsepower
watts
kilowatts
foot-pounds/minute
foot-pounds/second
btu/second
btu/minute
btu/hour
E
Voltage
volts
EFF
Efficiency
efficiency
PF
Power Factor
power factor
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See also
Calculations
AC Single Phase for Current, Voltage, Power, or Power Factor
AC Single Phase for KVA, Current, or Voltage
Voltage Drop - Single phase, with Known Resistance
Tables
Full-load current for single-phase transformer voltage
Full-load current in amperes for single-phase alternating current motors
Allowable ampacity of single, insulated copper conductors
Definitions
Single Phase
Split Phase
Feeder
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