Knowing how to calculate amps is important for a variety of reasons. It can help you determine the size of the electrical service you need for your home or business, as well as figure out the proper way to wire your circuits. Keep reading to learn more about how to calculate amps.

## How To Calculate Amps?

The formula for amps is simple: **Watts / Volts = Amps**.

For example, if you have a 4160-watt appliance and it is running on a208 volt circuit, then the formula would be 4160 watts / 208 volts = 20 amps.

Or, if you have a 3600-watt appliance and it is running on a 240-volt circuit, then the formula would be 3600 watts / 240 volts = 15 amps.

It’s important to note that this formula only works if you know how many watts your appliance uses and what voltage your circuit is running at. The vast majority of appliances in North America use 120 or 240 volts, so those are the voltage options we will focus on here.

However, if you live in Europe or another part of the world where the standard voltage is different, then you will need to use a different formula.

For example, if you have a 5000-watt appliance and it is running on a 230-volt circuit, then the formula would be 5000 watts / 230 volts = 21.7 amps.

Basically, all you need to do is plug in the numbers for Watts and Volts into the formula, and it will calculate the number of amps for you. Easy, right? However, there are certain situations where this formula will not work as effectively.

For example, let’s say you want to calculate the number of amps being used by an array of 100 light bulbs that are each using 50 watts of power. In this case, you cannot simply use the previous formula because it only works for calculating amperage for a single appliance or device.

## How To Calculate Amps For An Array Of Devices?

So how do you calculate amperage for an array of devices? Well, firstly you need to add up the total number of watts being used by all 100 light bulbs.

This can be done by multiplying 50 watts by 100 light bulbs which equal 5,000 watts in total.

Now that we know the total number of watts being used by our light bulb array, we can plug that number into our original formula which looks like this: **Watts / Volts = Amps. 5,000 watts / 120 volts = 41.7 amps.**

**How do I calculate amps from watts?**

One of the most common questions electricians get asked is how to calculate amps from watts. The answer is actually quite simple: **amps = watts/volts.**

For example, if you have a 4160-watt appliance and it is hooked up to a 208-volt circuit, then the amp draw would be 20 amps. If you have a 3600-watt appliance hooked up to a 240-volt circuit, the amp draw would be 15 amps.

However, it’s important to note that this is just a general rule of thumb and that there are other factors that can affect the amp draw of an appliance, such as the age and efficiency of the appliance, the length of wire used, and whether the appliance is being used in a low or high power mode.

When in doubt, always consult with a licensed electrician to ensure that your appliances are properly wired and that your circuits are not overloaded.

**How many volts are in an amp?**

In order to understand how watts are calculated, it is first necessary to understand what amps and volts are.

Amps measure the flow rate of current in an electrical circuit, while volts measure the electrical pressure. One amp is equal to one volt of electrical pressure applied against one ohm of resistance.

When these two factors are multiplied together, the result is watts. Thus, watts are a measure of the amount of power that an electrical circuit can produce.

In order to calculate watts, all you need to do is multiply the current (measured in amps) by the electrical pressure (measured in volts).

## FAQ

### How do I convert watts into amps?

Watt’s Law states that power (P) is equal to current (I) times voltage (V). This formula can be rearranged to solve for amps, which gives us the equation: amps = watts รท volts. This equation can be used to convert watts to amps at a fixed voltage.

For example, if you have a 100 watt light bulb and you want to know how many amps it uses at 120 volts, you would divide 100 by 120 to get 0.83 amps.

Similarly, if you have a appliance that uses 500 watts at 240 volts, you would divide 500 by 240 to get 2.08 amps.

Converting watts to amps is a simple way to determine how much electrical current is required to power a given device.

## Conclusion

Use this formula to calculate amps: Amps = Watts / Volts. An easy way to remember this is that jeans are rated in watts and not volts.

Be sure you use the correct voltage when you’re designing your outdoor lighting projects! If you have any questions about calculating amps or anything else related to electricity, please don’t hesitate to contact us. We’ll be more than happy to help!

Our team of certified electricians can also help with all sorts of commercial and residential projects – big or small. Services we offer include (but are not limited to): installing and repairing outlets and switches, code corrections, knob & tube replacements, fuse panel maintenance, indoor/outdoor lighting, and much more! Thanks for reading!