Volt ampere to Watt Converter

Enter the value that you want to convert volt ampere (V*A) to watt (W) or watt to volt ampere.Also written as V*A to W conversion.

1 volt ampere = 1.0000000 watt

Formula: watt = volt ampere value × 1.0000000

V*A to W — volt ampere to watt

Value

V*A

Result

10.00000W

10 volt ampere = 10.00000 watt

Popular Power Converters:

hp to kW kW to hp hp to watts watts to hp BTU to ton ton to BTU watts to kilowatts

Volt ampere to Watt: The Essentials

The Volt ampere in Engineering

Volt ampere (V*A) is a unit of power measurement. 1 volt ampere is equal to 1.0000000 watt.

About the Watt

Watt (W) is a unit of power measurement. 1 watt is equal to 1.0000000 volt ampere.

Power Measurement Across Applications

Power units span from milliwatts in electronics to megawatts in power plants. Engine output is still quoted in horsepower (mechanical, metric, and electrical — all slightly different). HVAC systems rate cooling in tons of refrigeration or BTU/hour. Solar panels specify watts peak. Electric motors list watts or kilowatts. Each industry carries its historical unit preferences, making conversion between them a daily necessity.

volt ampere to watt metric conversion table

0.01 V*A	=	0.01000 W
0.1 V*A	=	0.10000 W
1 V*A	=	1.00000 W
2 V*A	=	2.00000 W
3 V*A	=	3.00000 W
4 V*A	=	4.00000 W
5 V*A	=	5.00000 W
6 V*A	=	6.00000 W
7 V*A	=	7.00000 W
8 V*A	=	8.00000 W
9 V*A	=	9.00000 W
10 V*A	=	10.00000 W
11 V*A	=	11.00000 W
12 V*A	=	12.00000 W
13 V*A	=	13.00000 W
14 V*A	=	14.00000 W
15 V*A	=	15.00000 W
16 V*A	=	16.00000 W
17 V*A	=	17.00000 W
18 V*A	=	18.00000 W

19 V*A	=	19.00000 W
20 V*A	=	20.00000 W
30 V*A	=	30.00000 W
40 V*A	=	40.00000 W
50 V*A	=	50.00000 W
60 V*A	=	60.00000 W
70 V*A	=	70.00000 W
80 V*A	=	80.00000 W
90 V*A	=	90.00000 W
100 V*A	=	100.00000 W
200 V*A	=	200.00000 W
300 V*A	=	300.00000 W
400 V*A	=	400.00000 W
500 V*A	=	500.00000 W
600 V*A	=	600.00000 W
700 V*A	=	700.00000 W
800 V*A	=	800.00000 W
900 V*A	=	900.00000 W
1000 V*A	=	1000.00000 W

How to Convert V*A to W (Volt ampere to Watt)?

We can convert volt ampere to watt by using an example.

Example:

Convert 20 Volt ampere to Watt?

We know 1 Volt ampere = 1.0000000 watt; 1 Watt = 1.0000000 volt ampere.

20 volt ampere = ___W

20 × 1.0000000 = 20.00000 W (we know 1 volt ampere = 1.0000000 watt)

Answer:

20 volt ampere = 20.00000 watt

Volt-Amperes to Watts: Understanding Apparent vs. Real Power

Volt-amperes (VA) measure apparent power — the product of voltage and current in an AC circuit regardless of phase angle. Watts measure real (true) power — the portion that does useful work. For a purely resistive load (power factor = 1), 1 VA = 1 W. For inductive or capacitive loads, watts = VA × power factor. The power factor typically ranges from 0.6 to 0.99.

Identify the apparent power in volt-amperes (VA).
Determine the power factor (PF) of the load (0 to 1).
Multiply: Watts = VA × Power Factor.
If power factor is unknown, assume 0.8 for mixed loads as a conservative estimate.
For unity power factor (resistive loads like heaters): 1 VA = 1 W.

💡 Tip: UPS systems are rated in VA. To find the actual watt capacity, multiply by the rated power factor (typically 0.8-0.9). A 1,000 VA UPS at PF 0.8 can handle only 800 W of real load.

VA to Watts at Various Power Factors

How apparent power (VA) converts to real power (W) depends on power factor:

Volt ampere	Watt	Note
100 VA (PF=1.0)	100 W	Resistive heater
100 VA (PF=0.9)	90 W	Computer PSU
100 VA (PF=0.8)	80 W	Old fluorescent lighting
500 VA (PF=0.9)	450 W	Small UPS rated load
1,000 VA (PF=0.8)	800 W	Standard UPS
3,000 VA (PF=0.9)	2,700 W	Rack-mount UPS
10,000 VA (PF=0.95)	9,500 W	Large UPS system
100,000 VA (PF=0.9)	90,000 W	Data center UPS module

Solved Examples: VA to Watts

Question 1: A UPS is rated 1,500 VA with power factor 0.9. What is the real power capacity?

Solution:

Watts = VA × PF

= 1,500 × 0.9

= 1,350 W

Answer: The UPS can supply up to 1,350 W of real power to connected equipment.

Question 2: An electric space heater draws 1,200 VA at unity power factor. What is the wattage?

Solution:

Watts = VA × PF

= 1,200 × 1.0

= 1,200 W

Answer: 1,200 VA at PF=1 equals 1,200 W. Resistive loads have VA = W.

Question 3: A motor draws 2,000 VA at 0.75 power factor. Calculate real power in watts.

Solution:

Watts = VA × PF

= 2,000 × 0.75

= 1,500 W

Answer: The motor consumes 1,500 W of real power, with 2,000 VA apparent.

Practice: VA to Watts

Try solving these on your own to test your understanding:

Convert 750 VA at PF=1.0 to watts. (Answer: 750 W)
A UPS rated 3,000 VA at PF 0.8. What is max watts? (Answer: 2,400 W)
A fluorescent fixture draws 200 VA at PF 0.85. Calculate watts. (Answer: 170 W)
A server draws 500 VA at PF 0.95. What is real power? (Answer: 475 W)
An air conditioner draws 5,000 VA at PF 0.88. Calculate watts. (Answer: 4,400 W)

Why UPS Systems Are Rated in VA, Not Watts

UPS (Uninterruptible Power Supply) systems are rated in VA because the internal components (transformer, inverter, wiring) are limited by current flow, not by how much real work the load performs. A UPS rated 1,000 VA can safely carry 1,000 VA regardless of power factor. But the battery runtime depends on watts (real power drawn). This is why UPS specs list both VA and maximum watts.

Power Factor Correction in Modern Electronics

Modern computer power supplies include active Power Factor Correction (PFC) circuits that bring PF close to 0.99. This means for modern PCs, VA ≈ watts. Older equipment without PFC (motors, old fluorescent ballasts, cheap power supplies) may have PF as low as 0.6. When sizing a UPS or generator, always account for the worst-case power factor of connected loads.

Key Takeaways

1 VA = 1 W only at unity power factor (PF = 1).
Formula: Watts = VA × Power Factor.
Resistive loads (heaters, incandescent bulbs): PF ≈ 1.0.
UPS systems are rated in VA; real capacity = VA × PF.
Modern electronics with PFC have PF ≈ 0.95-0.99.

Volt ampere to Watt Conversion Formula

watt = volt ampere × 1.0000000

1 volt ampere = 1.0000000 watt

1 watt = 1.0000000 volt ampere

Reverse: volt ampere = watt × 1.0000000

Frequently Asked Questions

How many watt are in 1 volt ampere?

There are 1.0000000 watt in 1 volt ampere. To convert volt ampere to watt, multiply the value by 1.0000000.

How do I convert volt ampere to watt?

Multiply your volt ampere value by 1.0000000 to get the equivalent in watt. For example, 5 volt ampere = 5 × 1.0000000 = 5.00000 watt.

How do I convert watt to volt ampere?

Multiply your watt value by 1.0000000 to get the equivalent in volt ampere. Alternatively, divide by 1.0000000.

What is 10 volt ampere in watt?

10 volt ampere is equal to 10.00000 watt.

What is 100 volt ampere in watt?

100 volt ampere is equal to 100.00000 watt.