# Electrical Calculators and Resources

Our electrical calculators and resources can help estimate the electrical uses and cost of lighting and household appliances and estimate wire sizes for electrical project work.

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## 2018 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.

## 2018 Lighting Energy Cost Calculator

Estimate the cost of electricity to power the lights in your home. Calculate the cost savings of upgrading to LED or CFL lighting.

## Kilowatts to Amps Electrical Conversion Calculator

Convert the power in kilowatts to current in amps or find the power given the amperage rating of a generator or other electrical equipment.

## Ohm’s Law Calculator

Calculate watts, volts, amps, ohms, power, voltage, current, and resistance using the Ohm’s Law and Watt’s Law formulas.

## 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.

## Volts to Amps Electrical Conversion Calculator

Use the volts to amps calculator to convert between voltage and amperage in an electrical circuit. A voltage to amperage conversion can be made if wattage or resistance in the circuit is known.

## Watts to Amps Electrical Conversion Calculator

Convert the power in watts to the current in amps for an electrical circuit or find how many watts of power a device draws given the amp rating.

## Watts to Joules Electrical Conversion Calculator

Convert between power in watts and electrical energy measured in joules and see formulas used for the calculations with examples.

## Wire Gauge Size and Resistance Calculator

Calculate the diameter, cross-sectional area, and resistance of wire given the wire gauge or find the wire gauge for a given diameter.