How to Calculate Amps, Volts, and Watts

A volt-ampere (SI symbol: V⋅A or V A; also VA) is the unit for the apparent power in an electrical circuit. The apparent power equals the product of root mean square voltage and root mean square current. In direct current (DC) circuits, this product is equal to the real power in watts. Volt-amperes are usually used for analyzing alternating current (AC) circuits. The volt-ampere is dimensionally equivalent to the watt (in SI units, 1 V⋅A = 1 W). VA rating is most used for generators and transformers (and other power handling equipment) where loads may be reactive (inductive or capacitive).

 

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 Conversion Formulas

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

 

Watts = Amps x Volts

Examples:

10 Amps x 120 Volts = 1200 Watts

5 Amps x 240 Volts = 1200 Watts

Amps = Watts / Volts

Examples:

4160 Watts / 208 Volts = 20 Amps

3600 Watts / 240 Volts = 15 Amps

Volts = Watts / Amps

Examples:

2400 Watts / 20 Amps = 120 Volts

2400 Watts / 10 Amps = 240 Volts

 

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.

 

https://en.wikipedia.org/wiki/Volt-ampere