Amps to Watts Calculator

This Amps to Watts calculator calculates the wattage (power) of an electric device based on its amperage (current) and voltage.

What are Amps and Watts?

Amperes and watts are the units of measurement that represent various aspects of electric properties.

Amps (amperes):

Amps is the unit that measures the current flow of charges through the circuit. As the amperage increases, a large volume of electrical current can pass through the circuit.

Watts (wattage):

Watts indicates the speed at which energy is used or generated, commonly called power. The higher the wattage, the more power and output the appliance produces.

How to Calculate Amps to Watts?

To calculate the amp to watt look at the formulas below:

➥ DC Amps to Watts

To calculate amps from the DC (Direct current), divide the watts by the voltage.

Power = Current × Electric potential

Watts (W) = Amps (A) × Volts (V)

➥ AC Single Phase Amps to Watts

To find the AC (Alternating current) single-phase amp to watt follow the formula below:

Power = Power Factor × Current × Electric Potential

Watts = PF × Amps (A) × Volts (V)

➥ AC Three Phase Amps to Watts

Calculation with line-to-line Voltage:

Power (P) = √3 × VLL (V) × I (A)

Where:

P = Power in watts
VLL = Line-to-line voltage
I = Current in amperes

This formula is used when you know the line-to-line voltage and the current flowing through the system.

Calculation with line to Neutral Voltage:

Power (P) = 3 × VLN (V) × I (A)

Where:

P = Power in watts
VLN = Line-to-neutral voltage
I = Current in amperes

This formula is used when you know the line-to-neutral voltage and the current flowing through the system.

If you have a 120-volt light bulb that draws 0.5 amps of current, you can calculate its wattage as:

Wattage = Volts x Amps

Wattage = 120 volts x 0.5 amps

Wattage = 60 watts

You can also calculate it by using the volts, amps watts calculator to determine the wattage to ensure your electrical system is operating safely and efficiently.

Applications of Amps to Watts Calculator:

Home Electronics:

Determine the power rating of appliances to ensure they can operate safely on your home's electrical system

Solar Energy:

To meet the energy needs of your home or business calculate the power output needed from solar panels

HVAC:

Determine the energy consumption of heating and cooling systems to optimize energy efficiency

Electrical Engineering:

Calculate the power consumption of components to design circuits that meet specific power requirements

Industrial Applications:

Calculate the power requirements of machinery and equipment to ensure adequate power supply and prevent overloading

Relationship Between Amps & Watts (120 V)

Current (A)	Voltage (V)	Power (W)
1 amps	120 volts	120 watts
2 amps	120 volts	240 watts
3 amps	120 volts	360 watts
4 amps	120 volts	480 watts
5 amps	120 volts	600 watts
6 amps	120 volts	720 watts
7 amps	120 volts	840 watts
8 amps	120 volts	960 watts
9 amps	120 volts	1080 watts
10 amps	120 volts	1200 watts

How Many Amps & Watts do Household Appliances Use?

Domestic Portable Appliance	Amps Used	Watts Used
Laptop	<0.5	Up to 100
Mobile phone charger	<0.5	Up to 75
Chargers for battery operated devices	<0.5	Up to 75
Battery chargers for tools	1.5	Up to 350
Fridge (under counter type)	0.75	100
Mini Fridge	0.5	100
Fridge Freezer (Standard)	1.5	150
Kettle	Up to 13	Up to 3000
Satellite TV box/ Streaming devices	<0.5	30
Printer	<0.5	50
Radio	<0.5	15
Radiator or Fan Heater	Up to 13	Up to 3000
Desk lamp (with LED lamp)	<0.5	5
DVD	<0.5	20
Hair Dryer	10.0	2200
Hair Straighteners	<0.5	Up to 100
Computer monitor	<0.5	25
Desktop Computer	1.3	Up to 3000
Television 55” UHDr	<0.5	120
Games console	0.86	200
Washing machine	10	2200
Toaster (4 Slice)	9.0	2000
Toaster (2 Slice)	4.0	900
Tumble dryer (Heat Pump)	3.5	800
Iron	13	3000
Dishwasher	10.0	2200
Microwave	6.5	1500
Vacuum cleaner	9.0	2000
Wi-Fi router	<0.5	15
Electric Vehicle (Slow Charge)	Up to 13	Up to 3000
Portable air conditioner	Up to 9.3	Up to 2000
Alarm clock radio	<0.5	Up to 6W
Slow cooker	<0.5-1.1	Up to 250W
Portable Speaker (Bluetooth/wi-fi)	<0.5	Up to 65W
Toothbrush charger	<0.5	Up to 2.5W

FAQs

How many watts are in an amp?

The amount of wattage per amp varies based on the system's voltage. For a DC conversion at 120 volts, 1 amp will be equal to 120 watts.

How many watts is 120 volts?

As we know a volt is a unit of electric potential, similar to the voltage. To find the power you need to know the current (amps) being drawn.

The formula to calculate power is:

Watts = Volts x Amps