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.

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- mAs Calculator
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## 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?

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

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

**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.