⚡ Electricity

📐AC Phase Angle & Impedance Calculator Find the phase angle, impedance and power factor of an R-L or R-C circuit, or the angle from a time shift, free online. 🔌Appliance Running Cost Calculator Calculate the electricity cost of running an appliance per day, month and year from its wattage and hours of use, free online. 🧵AWG Wire Gauge Calculator Look up diameter, area and resistance for an AWG wire size, free online. 🔋Battery Bank Size Calculator Size a battery bank for a load, runtime and depth of discharge, free online. 🔋Cable Size & Voltage Drop Calculator Calculate the voltage drop of a cable run and the minimum conductor size for a 3% drop, free online. ⚡Capacitance Series/Parallel Calculator Calculate total capacitance for two capacitors in series or parallel, free online. 🔋Capacitor Charge & Energy Calculator Calculate the charge and stored energy of a capacitor from capacitance and voltage, free online. 🔘Circuit Breaker Size Calculator Choose a standard circuit breaker rating for a load in watts, with the 125% continuous-load rule, free online. 💡Electricity Cost Calculator Calculate the energy usage and cost of running an appliance, free online. 🧯Fuse Rating Selector Calculator Pick a fuse rating for a load current with the right margin for general, motor or inductive loads, free online. 🔌Generator Size Calculator Size a standby generator from your appliances' running and starting watts, free online. ⚡kWh ⇄ Ah ⇄ Wh Converter Convert battery energy between kilowatt-hours, watt-hours and amp-hours at a given voltage, free online. 💡LED Resistor Calculator Calculate the series resistor needed for an LED and the nearest standard value, free online. 🏭Motor Full-Load Current Calculator Calculate the full-load current of an electric motor from its power, voltage, efficiency and power factor, free online. 📊Power Factor Calculator Calculate power factor, reactive power and phase angle, free online. 🔧Power Factor Correction (kVAR) Calculator Calculate the capacitor kVAR needed to correct a low power factor to a target and see the reduction in apparent power and current, free online. 🎨Resistor Color Code Calculator Read the resistance value from a 4-band resistor colour code, free online. ☀️Solar Array Size & Panel Count Calculator Size a solar PV system from your daily energy use, peak sun hours and losses, free online. ☀️Solar Panel Output Calculator Estimate the energy a solar array produces per day, month and year, free online. 🔺Star (Wye) vs Delta Connection Calculator Compare line current and power for a balanced three-phase load connected in star (wye) or delta, free online. 🏭Three-Phase Power Calculator Calculate real, apparent and reactive power in a three-phase system, free online. 🔀Transformer Turns Ratio Calculator Calculate secondary voltage and turns ratio for a transformer, free online. 🔋UPS / Inverter Battery Runtime Calculator Calculate how long a battery can power a load through a UPS or inverter, free online. 🔻Voltage Divider Calculator Calculate the output voltage of a two-resistor voltage divider, free online. 🧵Wire Ampacity (AWG, NEC) Calculator Look up the allowable current of copper wire by AWG size and insulation temperature rating, with the 80% continuous-load rule, free online. 🔌Wire Resistance Calculator Calculate the electrical resistance of a wire from resistivity, length and cross-sectional area, free online.