1,800 W is the example result. Read it using the units and relationship stated below.
VA to Watts uses apparent power (va), power factor.
Distinguishing electrical arithmetic from equipment selection
For va to watts, the relationship is Result = [Apparent power (VA)] × [Power factor]. The amount depends on the supplied apparent power (va), power factor, rather than a live market price or a value imported from another record. Power, energy, voltage and current describe different quantities. Watts represent a rate; watt-hours represent energy over time. Battery and inverter losses can reduce usable runtime even when the rated capacity is unchanged.
What the model includes
Result = [Apparent power (VA)] × [Power factor] Read unit labels before comparing results. Motor estimates depend on phase, efficiency and power factor; energy budgets depend on duration and duty cycle. Nameplate values and measured consumption may differ under real loads. Treat the output as the stated estimate. It does not select a code-compliant conductor, protective device or complete installation. Equipment specifications and applicable requirements remain part of the design decision.
Example with the supplied inputs
Apparent power (VA): 2000; Power factor: 0.9. Result: 1,800 W. The values are illustrative.
Compare one changed input
Apparent power (VA) changes from 2000 to 2200. The result becomes 1,980 W. All other inputs remain fixed.
Calculation rule
Result = [Apparent power (VA)] × [Power factor]
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Apparent power (VA) | 2000 | Use the source quantity represented by apparent power (va). Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Power factor | 0.9 | Enter power factor as a fraction greater than 0 and at most 1 (0.9 means 90%). It is not an efficiency percentage. |
Output: 1,800 W is the example result. Read it using the units and relationship stated below. Unit: W.
How to use the page
Collect the inputs
Gather Apparent power (VA), Power factor. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Apparent power (VA) on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 1,800 W.
Change Apparent power (VA) from 2000 to 2200 while keeping every other value fixed. The result becomes 1,980 W. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026