Enter the wattage rating and the source voltage into the calculator to determine the amperage draw of the appliance. This calculate can also determine the wattage rating and source voltage.

## Amps Draw Formula

The following formula is used to calculate an amperage draw amount.

A = WR / SV
• Where A is the amps draw (amps)
• WR is the wattage rating (watts)
• SV is the source voltage

To calculate amps draw, divide the wattage ratting by the source voltage.

## Amps Draw Definition

What are amps draw? An amperage draw is a total current in amps delivered to an appliance or device that is dependent on the source voltage and wattage rating of the device.

## Example Problem

How to calculate amps draw?

1. First, determine the wattage rating.

For this example, we are looking at a lightbulb with a wattage rating of 200 watts.

2. Next, determine the source voltage.

The light bulb is connected to a standard outlet, so the source voltage is 120 volts.

3. Finally, calculate the amps draw.

Using the formula, the total current is 200/120 = 1.66 amps.

## FAQ

Are amps drawn or pushed? Amps are always drawn from a source as opposed to being pushed.

What determines amps draw? The number of amps or current that a device or appliance requires is dependent on the source voltage and the maximum power of the device, known as the wattage rating.