๐ก Electrical calculators
Explore circuit relationships, power, batteries and losses with clear planning estimates.
Choose a calculator for the job in front of you. Each tool opens without an account and keeps your working data in your browser.
ฮฉ Ohm's LawCalculate resistance and power from voltage and current.โ๏ธ Electrical PowerRelate voltage, current, power factor and apparent power.โ๏ธ Voltage DropEstimate conductor voltage drop from current, length and resistance.ใฐ๏ธ Wire ResistanceEstimate conductor resistance from resistivity, length and area.๐ Battery RuntimeEstimate runtime from capacity, voltage, load and usable depth.โ Series ResistorsCalculate total resistance and current for three resistors in series.โฅ Parallel ResistorsCalculate equivalent resistance and total current for three branches.๐ก LED Series ResistorEstimate a current-limiting resistor for a simple LED circuit.๐ Transformer RatioEstimate ideal secondary voltage and current from a turns ratio.๐ Energy UseEstimate consumption and cost from power, duty cycle and run time.