HP to kVAR Calculator
The hp to kvar calculator helps you quickly convert horsepower into reactive power (kVAR). It is essential for power factor correction and electrical system design.
Horsepower to Reactive Power
How to Use HP to kVAR Calculator
Follow these simple steps to use the hp to kvar calculator:
- Step 1: Enter Horsepower (HP): Input the motor or equipment rating in horsepower.
- Step 2: Enter Power Factor (PF): Provide the current power factor (usually between 0.7 and 0.95).
- Step 3: Enter Efficiency (Optional): Add motor efficiency if known (typical range: 85% to 95%).
- Step 4: Click Calculate: The calculator instantly shows required kVAR.
- Step 5: Analyze Result: Use the kVAR value for capacitor sizing or power factor correction.
Tip: Always use accurate PF and efficiency values for better results.
Conversion / Calculation Guide
To convert hp to kvar, follow this formula:
Formula Explanation
kW = HP × 0.746
kVAR = kW × tan(acos(PF))
Example Calculation
Suppose you have a motor with the following specifications:
- HP = 10
- Power Factor (PF) = 0.8
Step 1: kW = 10 × 0.746 = 7.46 kW
Step 2: acos(0.8) ≈ 36.87°
Step 3: tan(36.87°) ≈ 0.75
Step 4: kVAR = 7.46 × 0.75 = 5.6 kVAR
Final Answer: 10 HP ≈ 5.6 kVAR
HP to kVAR Conversion Chart
Assumption: Power Factor = 0.8, Efficiency = 100%
| HP | kW | kVAR |
|---|---|---|
| 1 HP | 0.75 kW | 0.56 kVAR |
| 2 HP | 1.49 kW | 1.12 kVAR |
| 5 HP | 3.73 kW | 2.80 kVAR |
| 10 HP | 7.46 kW | 5.60 kVAR |
| 15 HP | 11.19 kW | 8.40 kVAR |
| 20 HP | 14.92 kW | 11.20 kVAR |
| 25 HP | 18.65 kW | 14.00 kVAR |
| 50 HP | 37.30 kW | 28.00 kVAR |
Note: Values may change based on power factor.
Frequently Asked Questions (FAQs)
It converts horsepower into reactive power (kVAR) for electrical calculations.
You need this conversion for capacitor sizing and power factor correction.
Yes. Lower power factor increases required kVAR.
Yes. It works for most AC motors and industrial equipment.
Most systems operate between 0.8 and 0.9.
Yes. Including efficiency improves accuracy.
The system draws more reactive power, increasing kVAR demand.
Yes. Engineers use it for designing electrical systems.
Yes. Use the formula manually with a scientific calculator.
kW is real power, while kVAR is reactive power.