KVA to KVAR Calculator
Convert apparent power to reactive power instantly with our kVA to kVAR calculator. This tool helps engineers, electricians, and students calculate kVAR quickly and accurately. Use it to understand power factor, improve efficiency, and optimize electrical systems.
Apparent to Reactive Power Converter
How to Use the KVA to KVAR Calculator
Follow these simple steps to use the kVA to kVAR calculator:
Step-by-Step Instructions
- Enter the Apparent Power (kVA): Input the total apparent power of your electrical system.
- Enter the Power Factor (PF): Provide a value between 0 and 1 (e.g., 0.8 or 0.9).
- Click "Calculate kVAR": Press the button to compute the reactive power instantly.
- View the Result: The reactive power (kVAR) is displayed immediately below the form.
Tips for Accurate Results
- Always use the correct power factor of your system.
- Check if the system is inductive or capacitive.
- Use decimal format for power factor (e.g., 0.8, 0.9).
How to Convert KVA to KVAR
You can convert kVA to kVAR using a simple formula based on the power triangle relationship between apparent, real, and reactive power.
Formula
Step-by-Step Calculation Example
Let's calculate reactive power for kVA = 100 and Power Factor (PF) = 0.8:
1. Square the power factor:
PF² = 0.8 × 0.8 = 0.64
2. Subtract from 1:
1 − 0.64 = 0.36
3. Take the square root:
√0.36 = 0.6
4. Multiply by kVA:
kVAR = 100 × 0.6 = 60 kVAR
Key Insight
- Lower power factor increases kVAR.
- Higher reactive power means more energy loss.
- Use correction methods like capacitors to reduce kVAR.
KVA to KVAR Conversion Chart
Common values for quick reference:
| kVA | Power Factor | kVAR |
|---|---|---|
| 10 | 0.8 | 6.00 |
| 20 | 0.8 | 12.00 |
| 50 | 0.8 | 30.00 |
| 100 | 0.8 | 60.00 |
| 200 | 0.8 | 120.00 |
| 10 | 0.9 | 4.36 |
| 50 | 0.9 | 21.79 |
| 100 | 0.9 | 43.59 |
| 200 | 0.9 | 87.18 |
Note: Values are rounded to two decimal places for simplicity.
FAQs – KVA to KVAR Calculator
A kVA to kVAR calculator converts apparent power (kVA) into reactive power (kVAR) using the power factor. It helps analyze electrical system efficiency and energy losses.
kVA represents total (apparent) power in an electrical system. kVAR represents reactive power — the portion that does not perform useful work but is necessary to maintain the electromagnetic fields in inductive loads.
Power factor determines how much of the total apparent power becomes useful real power. A lower power factor increases kVAR, meaning the system is less efficient and draws more reactive current from the supply.
No. The power factor is an essential input in the formula kVAR = kVA × √(1 − PF²). Without it, it is not possible to determine the reactive component of the power accurately.
You can reduce kVAR by installing capacitor banks to offset inductive reactive power, improving load balance across phases, and using dedicated power factor correction devices or synchronous condensers.
Yes. The kVA to kVAR calculator is widely used in industrial and commercial electrical systems for power factor analysis, capacitor bank sizing, and energy efficiency audits.
High kVAR increases energy losses, reduces overall system efficiency, causes voltage instability, and may result in utility penalties for poor power factor. Correcting it lowers electricity costs and improves supply quality.