Watts to VA Calculator
Quickly convert watts to VA (volt-amps) for AC systems using this free calculator. Accurate results for single-phase and three-phase power. Fast, simple & online.
Quick Intro: Convert Watts to VA
To convert watts to VA, divide the power in watts by the power factor. The power factor (typically between 0.7 and 1) accounts for how efficiently a device uses current. This calculator simplifies the process by automatically applying the formula and returning the apparent power (VA). Just enter your watt value and the power factor to get the accurate VA result for both single-phase and three-phase systems.
Formula to Convert Watts to VA
- Formula:
VA = Watts ÷ Power Factor - This applies to all AC circuits where the power factor is known or assumed.
- Use a power factor between0.7 – 1.0. For general appliances, 0.8 is common.
Watts to VA Calculator Overview
TheWatts to VA Calculatorallows you to convert real power (watts) into apparent power (volt-amperes or VA) using the power factor of your AC system. It is ideal for calculating the size of UPS systems, generators, and other electrical equipment where you need to account for total apparent power, not just real power.
The conversion is simple but requires knowing thepower factor (PF), which measures how efficiently power is used. The formula used is:VA = Watts ÷ Power Factor.
This calculator works for bothsingle-phaseandthree-phaseAC systems. Input your wattage and known or assumed PF (e.g., 0.8), and the VA result appears instantly. Perfect for electricians, engineers, and students, this tool prevents under-sizing and ensures safe system design.
Sample Watts to VA Conversion Table
| Watts (W) | Power Factor | Apparent Power (VA) |
|---|---|---|
| 100 | 1.0 | 100 |
| 100 | 0.8 | 125 |
| 500 | 0.9 | 555.56 |
| 1500 | 0.7 | 2142.86 |
| 2000 | 0.95 | 2105.26 |
Frequently Asked Questions - Watts to VA Calculator:
What is the formula to convert watts to amps?
For DC: Amps = Watts ÷ Volts. For AC, you also consider power factor and phase.
Do I need a power factor for AC conversion?
Yes, for accurate AC calculations, the power factor (typically 0.8) must be included.
Can I convert kW to amps?
Yes, multiply kW by 1000 to get watts, then apply the formula.
How accurate is this calculator?
It provides highly accurate results, using standard electrical formulas.
Is this tool useful for both AC and DC circuits?
Yes, it works for DC, single-phase, and three-phase AC systems.
What if I don't know the power factor?
Use 0.8 as a common default for general calculations.
How many amps is 1000 watts at 120 volts?
For DC: 1000 ÷ 120 = 8.33 Amps.
Does voltage affect current?
Yes, higher voltage results in lower current for the same power.
Can I use this calculator for solar or inverter systems?
Absolutely, it’s ideal for off-grid, solar, and battery applications.
Is there a mobile version of this calculator?
Yes, it’s responsive and works on all smartphones and devices.
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