WebstaurantStore / Food Service Resources / Buying Guides / How to Calculate Amps, Volts, and Watts

How to Calculate Amps, Volts, and Watts

Try this simple calculator tool to accurately calculate any piece of equipment's amps, volts, or watts to ensure you're choosing the correct utilities.


You'll need to know your Amps, Volts, or Watts. If you have the information for two of those three, finding the missing number is either multiplication or simple algebra. Not a fan of math? Don't sweat it; we've already done the hard work for you below! Simply fill in two of the blank boxes and click "Calculate" to find your missing information.

Introduction to Electrical Terms

In the food service industry, the wrong utility is the number one reason for equipment failing to operate as it should. It's an easy problem to avert, and we're here to help you avoid that misstep in your business with our calculator tool. We'll also explain what each of these electrical terms mean, what they do, and how this calculator works.


Amps: Amperes, commonly known as amps, measure the flow of electricity as an electric current. Specifically, it measures the amount of electrons that flow past a certain point per second. If we think of the garden hose analogy, the more gallons of water per minute that are flowing, 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, and its pressure, or force, causes the water to flow. Volts are a measure of how much force each electron is under, which is called "potential," and this potential is what causes electricity to flow.

Watts: Amps and volts combine to create watts, a measurement of the amount of energy (or in the case of the garden hose, the amount of water) being released. 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.

It's worth knowing that the watts can remain the same while the volts and amps numbers vary. A small number of electrons under a lot of potential can supply plenty of power, or a lot of electrons at a low potential can provide the same amount of power. If we refer to the garden hose one last time, a slow water flow of one gallon per minute (like amps) slowly runs out of the hose if it's under low pressure (like low voltage). However, if you put a kink in the hose and let the pressure build, we've now increased the potential and the water can have more power (like watts), even though the flow is still just one gallon per minute.


It's important to note that nearly all of the refrigeration, cooking, and ware washing 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 do not come with a cord and plug, and 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.

Subscribe now for great deals and industry tips! Sign up for our mailing list to have weekly discounts and industry knowledge sent right to your inbox.

Food Service Resources

Tips, guides, & advice

Explore Resources
  • Visa
  • Discover
  • American Express
  • MasterCard
  • Paypal