All appliances contain information about power consumption, current strength and voltage. All these characteristics can be found on electric cables, electric meters, sockets, on power supply units, on the device case. Only a simple man in the street is not so easy to understand electric values, since certain markings are indicated on the devices.

How to calculate electrical powerThe unit for measuring the strength of an electric current is amperes, and the power of electrical, thermal, and mechanical currents is measured in watts. Electrical Engineering closely related these quantities among themselves using formulas. But, since they denote different values, it is not so easy to convert watts to amperes. However, according to the developed methods, some units of measure express others and vice versa. Therefore, the ratio of current and power is quite comparable.


  • 1 All about power units
  • 2 Amp conversion to watts and kilowatts
    • 2.1 Video: How to determine the current power
  • 3 How to convert watts to amps?
    • 3.1 Video: Pendant. Ampere. Volt.

All about power units

James watt steam engineThe unit of power is considered to be watts. This unit was invented by engineer James Watt at the very time that the steam engine appeared. The scientist needed to improve his invention so that his work was productive. Therefore, he had to compare the given value of the machine with the power of the horsepower. His main task was to determine how much a horse would do work in a given time. As a result of the experiment single horsepower unit was determinedthat was 746 watts.

Household appliances are necessarily marked with power consumption. In some luminaires, for example, you cannot use a bulb with a higher output than 60 watts. Such restrictions indicate that if a lamp with a power higher than that of a luminaire is screwed into a cartridge, the appliance simply will not withstand such a load and will be damaged. Light bulb can also serve less than a certain period of operation. This refers to incandescent bulbs. Recently invented lamps with LED and fluorescent emitters suitable for any fixtures, because they have a small capacity and flare up well when incandescent, because of what are in great demand among a large number of consumers.

Electrical appliances very different from each other by its power. These parameters depend on who invented them and on the quality of electrical components embedded in the production of equipment. So, the power characteristic of some electrical appliances has the following example data:

  • power conditioners and split systems is 20-40 kW;
  • power window air conditioners can be from 1 to 2 kW;
  • power ovens from 2.1 to 3.6 kW;
  • machines for washing and drying can consume from 2 to 3.5 kW;
  • in dish washing machines, the unit of measure will be from 1.5 to 2.5 kW;
  • electric kettles consume 2 kW;
  • in microwave ovens, power ranges from 0.5 to 1.5 kW;
  • cooling units consume up to 1 kW;
  • in toasters, power can fluctuate up to 1 kW.

To measure this value in our time use a special device - a dynamometer. Such a device allows to measure such a unit both for domestic purposes and in production.

Amp conversion to watts and kilowatts

Electrical appliances in everyday lifeElectrical appliances, of course, are equipped with a specific marking, but not everyone knows these symbols. Therefore, it would be quite appropriate to determine how to convert amps to watts. Sometimes you may need such information if you suddenly have to determine the amount of electricity consumed by the device for a certain time period. Also, this issue will be important if you need to connect a new electrical appliance to the mains, in order to avoid damage to the wiring.

The main problem when converting one value to another is the factor that plugs, circuit breakers and sockets contain information about the strength of the currentwhose unit of measure is ampere. But the devices that are connected directly to the network, are marked power in watts or kilowatts. These differences are misleading when recalculating these values.

When converting amperes to watts, you need to stock up with another indicator - voltage. The values ​​are calculated based on the following formula:

Р = І * U, where

P - power unit (W);

I - the magnitude of the current (A);

U is the unit of voltage (V).

When calculating you will need to determine how much one kilowatt contains watts. It's very simple: 1 kilowatt is 1000 watts.

When converting amperes to kilowatts, it should be taken into account that only the voltage of 220 V is always taken as a basis.

Video: How to determine the current power

How to convert watts to amps?

The formula for calculating ampereIt may not always be necessary to convert amps to watts. Sometimes, on the contrary, it is necessary to calculate the inverse watt / ampere ratio. The voltage in the network is determined by a fixed value, but units of power and amperage denote completely different units of measurement, although they can be interchanged.

All these values ​​are determined by the following values:

  1. Power is determined by the flow of energy consumed. A 100 watt lamp consumes 100 joules per second.
  2. Ampere is measured by the strength of electrical currents. This unit is determined by pendants. For a certain temporary space, it is possible to calculate how many electrons pass through a conductor.
  3. Volt is usually measured voltage in the network.

To convert watts to amps, you just need to use the following formula:

U = P: I

The definition of indicators is already indicated when calculating the conversion of amperes to watts.

Possession of such calculations will allow you to properly connect electrical appliances to the network in order to avoid overloading of electrical wiring and failure of electrical equipment. In addition, knowledge in this area will help consumers save energy and, consequently, money for their rational use.

Video: Pendant. Ampere. Volt.