Electrical Calculator Tools
Single-purpose calculators for electricians, electrical engineers and makers.
Voltage Drop Calculator
Voltage drop over a run by length, current and conductor (AWG/mm2, 1ph/3ph/DC)
Open CalculatorWire Size Calculator
Smallest conductor that meets ampacity and the voltage-drop limit (AWG/mm2)
Open CalculatorWatts Amps Volts Calculator
Convert between watts, volts and amps (DC, 1-phase, 3-phase)
Open CalculatorThree-Phase Power Calculator
Three-phase power triangle: line current, kW, kVA, kVAR
Open CalculatorLED Resistor Calculator
Series resistor for an LED: ohms, power and nearest standard value
Open CalculatorTransformer Sizing Calculator
Required transformer kVA and full-load amps from the load
Open CalculatorBreaker / Fuse Sizing Calculator
Next standard breaker or fuse size for a load (NEC 240.6)
Open CalculatorPower Factor Correction Calculator
Capacitor kVAR to correct power factor to a target
Open CalculatorFault Current Calculator
Available short-circuit current from transformer kVA and impedance
Open Calculator
Electrical Calculators
Fast, free calculators for electricians and engineers
Tools
- Voltage Drop Calculator
- Wire Size Calculator
- AWG Conversion Calculator
- Ohm's Law Calculator
- Watts Amps Volts Calculator
- Three-Phase Power Calculator
- kVA Calculator
- LED Resistor Calculator
- Conduit Fill Calculator
- Transformer Sizing Calculator
- Breaker / Fuse Sizing Calculator
- Motor FLA Calculator
- Power Factor Correction Calculator
- Battery Runtime Calculator
- Solar PV Sizing Calculator
- Energy Cost Calculator (kWh)
- Resistor Colour Code Calculator
- Fault Current Calculator
- All Tools
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Resources
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