Electrical Calculators and Resources

Our electrical calculators and resources can help estimate the electrical uses and cost of lighting and household appliances, estimate wire sizes for electrical project work, estimate circuit components, and perform physics calculations.

Plus, use our electrical conversion calculators to convert between different electrical units of power, current, frequency, and more.

Calculators

Electrical Property Conversion Calculators

Unit Conversion

Additional Resources

Find an Electrician or Electrical Contractor

Voltage Drop Calculator

Calculate voltage drop in an AC or DC circuit, find the minimum wire gauge required when planning a circuit, or determine the maximum length of conductors in a circuit.

Ohm’s Law Calculator

Use the Ohm's Law calculator to quickly calculate volts, amps, watts, and ohms. Use two known values to solve for voltage, current, power, or resistance.

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2019 Electricity Cost Calculator

Calculate electricity cost by entering wattage and usage of electricity and the cost per kilowatt-hour. Estimate energy costs and kilowatt-hour electricity usage.