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How to Calculate Amps, Volts, and Watts

How to Calculate Amps, Volts, and Watts

Identifying the amps, volts, and watts for any piece of equipment is critical to confirming compatibility with your building's utilities. If you have information for two of those electrical ratings, you can ensure the unit's safe, efficient operation by calculating the missing data. To convert watts to amps, amps to watts, or any other conversion, the answer is at your fingertips with a simple equation.

Electrical Calculator

It can sometimes be difficult to locate voltage, amperage, and wattage ratings on a user manual or spec sheet. If you need a volts to watts calculator, our electrical conversion calculator has you covered! Simply fill in two of the blank boxes below and click "Calculate" to convert amps to volts or watts.


Electrical Conversion Formulas

Alternatively, a handful of basic equations allow you to calculate the missing information on your own.


Watts = Amps x Volts

  • 10 Amps x 120 Volts = 1200 Watts
  • 5 Amps x 240 Volts = 1200 Watts

Amps = Watts / Volts

  • 4160 Watts / 208 Volts = 20 Amps
  • 3600 Watts / 240 Volts = 15 Amps

Volts = Watts / Amps

  • 2400 Watts / 20 Amps = 120 Volts
  • 2400 Watts / 10 Amps = 240 Volts
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Why are Electrical Ratings Important?

Hooking up your foodservice equipment to the wrong voltage is the number one reason for equipment failing to operate as it should. If you connect your new equipment to the wrong power supply, it won’t work as efficiently and may even become damaged.

Considering the investment required to outfit your kitchen with commercial equipment, you’ll want to make sure the electrical requirements are met. Use our voltage calculator to accurately calculate amps, voltage, or wattage so you can avoid this common misstep.

Installation of Electric Equipment

It's important to note that most of the refrigeration, cooking, and warewashing equipment on our site is designed for commercial or institutional use. The electrical specifications and requirements can vary greatly from item to item.

For example, many larger items such as ranges, bakery convection ovens, and oven proofer combos don't come with a cord and plug. These units must be hard-wired by an electrician. We highly recommend consulting an electrician if you are unsure about the suitability of a particular piece of electrical equipment for use in your business.
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What are Amps, Volts, and Watts?

Wondering what the difference between amps and volts is? Voltage, amperage, and wattage are all related. Read on if you’re interested in learning more about these electrical terms and how they work together.

Amps: Amperes, commonly known as amps, measure the flow of electricity as an electric current. Specifically, they measure the amount of electrons that flow past a certain point per second. A common analogy used to describe how amps work is a garden hose.  Amps can be compared to the volume of water flowing through the hose. The more gallons of water flowing through the hose per minute, the stronger the current. Or, as the number of electrons flowing past a certain point per second increases, so do the amps.

Volts: How do we make those amps flow? Voltage. In sticking with the garden hose analogy, voltage is similar to the water pressure in the hose. The pressure, or force, is what causes the water to flow. Volts are a measure of how much force each electron is under, which is called "potential.” Potential is what causes electricity to flow. The difference between volts and amps is that amps measure the volume of electrons flowing while volts measure the pressure causing them to flow.

Watts: Amps and volts combine to create watts, a measurement of the amount of energy being released. In the case of the garden hose, this would be the amount of water flowing. The higher the wattage, which we now know is the combination of electrical potential and flow, the more power and output we'll see. For example, the more wattage a microwave has to offer, the faster it will cook your food.

Now you have a basic understanding of how volts, amps, and watts work together to power your electrical equipment. You don't have to be an expert on electrical ratings as long as you know the voltage of your equipment and the type of power supply in your building. You can rely on our easy voltage calculator to determine any missing info.

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