Amps (A) to Watts (W) Conversion Calculator

How to convert amps (A) to Watts (W) calculation for DC Line, single-phase & 3-phase conversion. amps to Watts formula. amps to watts law: Amps x Volts = Watts. 20 Amps x 120 Volts = 1400 Watts · Amps. Amps measure the flow of electricity as an electric current.

Amps To Watts Calculator

Select Current Type

Current (I)

Select Voltage Type

Voltage (V)

Power factor (≤1)

Real Power (P)

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Conversion using the Amps to Watts Formula

DC Amps to Watts Calculation formula

The Real Power P in watts w is calculated as the Current I amps A, times the voltage in volts v. Plug these values into the formula:

Real Power(P) = Current(I) × Voltage(V)

or, P(W) = I(A) × V(V)

or, Watts = Amps × Volts

For Example,

Single Phase Amps to Watts Calculation formula

The Real Power P In watts w is calculated as the Power factor in pf times the phase current I in amps A, times the RMS Voltage in volt v. Plug these values into the formula:

Real Power(P) = Power factor(pf) × Current(I) × Voltage(V)

or, P(w) = pf × I(A) × V(V)

or, Watts = pf × Amps × Volts

For Example, If the Voltage consumption is 220V with a phase current of 10A and a power factor of 0.8 the Real Power is watts.

3-Phase Amps to Watts Calculation formula

Calculation with Line to Line voltage

The Real Power P in Watts w is calculated as the square root of 3 times the Power factor in pf times the 3 phase current I in amps A, times the line-to-line RMS Voltage V_L-L in volts v. Plug these values into the formula:

Real Power(P) = 3 × Power factor(pf) × Current(I) × Voltage(line-line)

or, P(W) = 3 × pf × I(A) × V(line-line)

or, Watts = 3 × pf × Amps × Volts

For Example,

Calculation with Line to Neutral voltage

The Real Power P in Watts w is calculated as the 3 times the Power factor in pf times the 3 phase current I in amps A, times the line-to-line RMS Voltage V_L-L in volts v. Plug these values into the formula:

Real Power(P) = 3 × Power factor(pf) × Current(I) × Voltage(line-Neutral)

or, P(W) = 3 × pf × I(A) × V(line-Neutral)

or, Watts = 3 × pf × Amps × Volts

For Example,

How to use Amps to Watts Calculator?

To use the above "Amps to Watts Conversion Calculator" follow the below steps:

1. Select Phase Type: Choose between DC Line, Single Phase Line, or 3 Phase Line by choosing the appropriate option from the dropdown.

2. Enter Current: Input the Current in Amps value in the specified input box. You can enter the value in milliamps mA, Amps A, Kiloamps kA, or Megaamps MA by choosing the appropriate option from the dropdown.

Fig-2: How to Use Amps to Watts Calculator

3. Enter Supply Voltage: Input the supply voltage or Load voltage value in the specified input box. You can enter the value in millivolts mV, Volts V, Kilovolts kV & MegaVolt MV by choosing the appropriate option from the dropdown.

4. Enter Power Factor: Input the power factor of the Load in the provided input box. The power factor is a unitless value typically between 0 and 1.

5. Select Voltage Type: Choose between Line to Line Voltage or Line to Neutral Voltage by choosing the appropriate option from the dropdown.

6. Reset: Click the Reset If you want to reset the calculator to perform another conversion, you can click the Reset button, and all input fields will be cleared.

7. Calculate: Click the Calculate button to obtain the results. The calculated results will be displayed in the Results: section.

8. Swap: If you want to Swap the calculated to Exchange conversion, you can click the Swap button, and Calculate will be Exchange.

9. Result: The calculated "Result" will be displayed in the respective Result In output Watts output field.

Typical power factor values

Do not use typical power factor values for accurate calculations.

Equipment and appliances				cos θ	tan θ
Motor	Common induction motor	loaded at	0 %	0.17	5.80
			25%	0.55	1.52
			50 %	0.73	0.94
			75 %	0.80	0.75
			100 %	0.85	0.62
Lamps	Incandescent lamps			1.0	0
	Fluorescent lamps (uncompensated)			0.5	1.73
	Fluorescent lamps (compensated)			0.93	0.39
	Discharge lamps			0.4 to 0.6	2.29 to 1.33
Ovens	Ovens using resistance elements			1.0	0
	Induction heating ovens (compensated)			0.85	0.62
	Dielectric type heating ovens			0.85	0.62
Welding	Resistance-type soldering machines			0.8 to 0.9	0.75 to 0.48
	Fixed 1-phase arc-welding set			0.5	1.73
	Arc-welding motor-generating set			0.7 to 0.9	1.02 to 0.48
	Arc-welding transformer-rectifier set			0.7 to 0.8	1.02 to 0.75
Arc furnace				0.8	0.75
Power Factor Value Conversion Table

Frequently Asked Questions - FAQs for Name Calculator

How do you calculate ampere?

Current (A) = Real Power (W) ÷ Voltage (V).

How to calculate voltage?

When spelled out, it means voltage = current (A) × resistance (ohm) , or volts = amps × ohms, or V = A × Ω.

How many kVA in 1 amp?

The electrical efficiency is typically expressed as a power factor between 0 and 1. The closer the power factor rating is to 1, the more efficiently the kVA will be converted into kilowatts.

How to calculate the power formula?

The formula for power in watts is given by the work and the time. The formula is P = W ÷ t, where W is the work done in some time t.

What is called 1 volt?

1 Volt is defined as energy consumption of 1 joule per electric charge of 1 coulomb.

About the Author

Md Jony Islam

Jony is a passionate writer and web developer. He enjoys sharing insights about technology, web development, and design. When he's not writing, he loves hiking and exploring the outdoors.

Amps (A) to Watts (W) Conversion Calculator | Amps to Watts Convert | Amps to Watts formula