Watts (W) to Volt-amps (VA) Conversion Calculator

Conversion Using the Power Formula: AC Single Phase Watts to VA Calculation: The Apparent Power (S) in Volt-amps (VA) is equal to the Real Power (P) in watts. online tool for volt-ampere to watt conversion or vice versa. The volt-ampere [V*A] to watt [W] conversion table and conversion.

Watts To VA Calculator

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Conversion using the Watts to VA Formula

Watts to VA Calculation formula

The Apparent Power S in volt-amps va is calculated as the Real Power P in Watts w, divided by the Power factor in pf. Plug these values into the formula:

Apparent Power(S) = Real Power(P) Power factor(pf)

or,S(VA) = P(W) pf

or, VA = Watts pf

For Example, If an Induction motor takes 10kW active power at 0.80 (lag) power factor from the AC source. Calculate the VA rating of the motor.

How to use Watts to VA Calculator?

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

1. Enter Real Power: Input the Real Power in watts or Load watts value in the specific input box. You can enter the value in millivolts mw, Watts W, kilowatts KW, & Megawatts MW by choosing the appropriate option from the dropdown.

2. 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.

Fig-2: How to Use Watts to VA Calculator

3. 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.

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

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

6. Result: The calculated "Result" will be displayed in the respective Result In output VA output field.

Watts to VA or KVA Comparison and Sizing Table

Input		Output
Watts [W]	Power factor [PF]	Apparent Power [VA]	Apparent Power [KVA]
10W	0.8PF	12.5000VA	0.0125KVA
20W	0.8PF	25VA	0.0250KVA
30W	0.8PF	37.5000VA	0.0375KVA
40W	0.8PF	50VA	0.0500KVA
50W	0.8PF	62.5000VA	0.0625KVA
60W	0.8PF	75VA	0.0750KVA
70W	0.8PF	87.5000VA	0.0875KVA
80W	0.8PF	100VA	0.1000KVA
90W	0.8PF	112.5000VA	0.1125KVA
100W	0.8PF	125VA	0.1250KVA
1000W	0.8PF	1250VA	1.2500KVA

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 Watts to VA Calculator

How do you convert VA to watts?

A volt-amps × power factor = watts. When you want to know how much the electricity is costing you, you use watts. When you are specifying equipment loads, fuses, and wiring sizes you use the VA, or the voltage times the amperage.

What is the formula for watts to VA?

Use the following formula to calculate VA from watts: Apparent Power(VA) = Real Power in Watts ÷ Power factor in PF.

What is 1500 VA?

That 1500VA (or 1500Watt) means that the UPS can deliver 1500W maximum. It has no relation to the battery capacity nor how much current is used to charge the battery.

How many watts is 850 VA?

Here rating of the inverter is 850 VA, so it can handle 850 VA maximum. Considering the power factor of 0.80, the total wattage will be 850 × 0.9 = 765 Watts.

What is 1 watts into volt-amps (VA)?

A watt changes depending on whether the electrical circuit is AC or DC. In a DC circuit, 1200VA is the equivalent of 200W. This equivalence means that the power factor of that power supply is 0.90.

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.

Watts (W) to Volt-amps (VA) Conversion Calculator | Watts to Va Convert | watts to VA formula