Here you’ll find several technical calculators for electricity. They can be used to determine electrical parameters commonly used by master electricians.

Use this tool to calculate the service capacity for a single-family dwelling (120/240 V) as per the Code’s requirements based on floor area and load.

This calculator can be used to estimate short-circuit capacity at several points in a distribution circuit.

This calculator can be used to determine the acceptable voltage drop for a given conductor in a single-phase or three-phase circuit. The maximum length or size of a conductor can also be calculated according to the acceptable voltage drop.

Use this tool to determine the value of a resistor in ohms and its tolerance by indicating the colour of each of the bands. Conversely, the colour of each band can be determined using the resistor value and tolerance.

Use Ohm’s law and the power formula to determine the tension, current, resistance or power of an electrical component. If you know two of the four component parameters, you can calculate the other two using this tool.

This form will calculate the hourly rate depending on various factors you have mentioned: number of apprentices or companions, cost of your truck and your equipment, your operation costs and desired profit margin.

Convert is a free and easy-to-use program that will convert the most physical quantities and units. It also includes an option for creating custom conversions.