Electrical and energy calculators

For electricians, engineers and homeowners. They work with 50 and 60 Hz supplies, in AWG (NEC) or mm² (IEC).

Wiring & protection

• Wire size calculatorMinimum wire gauge by ampacity and voltage drop.
• Voltage drop calculatorVolts and % lost in the wire.
• Circuit breaker size calculatorBreaker amps and trip curve.
• AWG ↔ mm² converterAmerican wire gauge to metric size.

Basic calculations

• Ohm's law calculatorVolts, amps, ohms and watts.
• Watts to amps and amps to wattsW ↔ A for DC, single and three-phase.
• kW, HP, metric HP, kVA and amps converterkW ↔ HP ↔ kVA ↔ A.
• Power factor correction calculatorkVAR and µF to correct the power factor.

Motors

• Torque, power and RPM calculatorN·m, kW/HP and RPM.
• Motor speed calculator (poles, Hz, VFD)RPM from poles, Hz and VFD.

Energy & solar

• Solar panel calculatorPanels, kW, production and savings.
• Solar battery calculatorkWh, Ah and battery bank layout.
• Appliance electricity cost calculatorkWh and cost per month and year.