KVA to kW Calculator
Convert apparent power (kVA) to real power (kW) using power factor for accurate electrical system calculations
KVA to kW Calculator
Apparent Power to Real Power Converter
Results:
Real Power: 0.00 kW
Apparent Power: 0.00 kVA
Power Factor: 0.00
Reactive Power: 0.00 kVAR
How to Use the KVA to kW Calculator
Basic Operation
- Enter the apparent power value in kVA
- Input the power factor (0.1 to 1.0)
- Optionally select a load type for typical power factor
- Click "Calculate kW" to get the real power
- View detailed results including reactive power
Power factor represents the efficiency of power usage in your electrical system
Industrial Applications
- Determining actual power consumption for billing
- Sizing backup generators and UPS systems
- Calculating energy costs and efficiency
- Planning electrical load distribution
- Optimizing power factor for utility compliance
Understanding real power helps in accurate energy management and cost control
Professional Tips
- Measure power factor using a power quality analyzer
- Consider power factor correction for low PF loads
- Monitor power factor regularly for optimal efficiency
- Account for varying power factors in mixed loads
- Use nameplate data when actual measurements unavailable
Higher power factor means more efficient use of electrical power and lower utility costs
How to Calculate KVA to kW
Use these practitioner tips to turn any apparent power reading into real power without leaving the calculator.
Know the Core Formula
Real power (kW) always equals apparent power (kVA) multiplied by how closely voltage and current stay in phase.
kW = kVA x Power Factor
Keep this relationship in mind because every other conversion simply feeds more accurate inputs into the same expression.
Collect Accurate Inputs
Confirm the equipment nameplate kVA rating and note the power factor from a meter, analyzer, or manufacturer datasheet.
Power Factor = kW / kVA
This ratio always stays between 0 and 1, so a PF of 0.82 means 82% of the apparent power becomes useful work.
Run a Manual Conversion
- Record the apparent power directly from the panel, generator, or transformer nameplate.
- Measure or estimate the present power factor using a meter, clamp-on analyzer, or typical values.
- Multiply the two numbers and compare the kW result to your required load.
Example: 25 kVA x 0.86 PF = 21.5 kW
Handle Three-Phase Loads
Three-phase systems use the same kVA-to-kW relationship, but you can also calculate kVA from line voltage and current.
kW = (1.732 x Voltage x Current x PF) / 1000
Use the identical power factor in both formulas so the manual math matches what the online calculator reports.
Check Power Factor Impact
Every drop in power factor increases current draw, heating, and kVA demand for the same workload.
Efficiency (%) = PF x 100
Correcting a PF from 0.78 to 0.95 boosts usable power by almost 22% without upsizing conductors or switchgear.
Document the Result
Compare the calculated kW against protection settings, generator capacity, and utility billing thresholds.
75 kVA x 0.82 PF = 61.5 kW of real load
Recording a few conversions like this provides the proof needed for capacitor banks or equipment upgrades.
KVA to kW Chart
Use this reference chart whenever you need a quick comparison of apparent power ratings at popular power factor assumptions.
| kVA | kW @ PF 0.60 | kW @ PF 0.80 | kW @ PF 0.90 | kW @ PF 1.00 |
|---|---|---|---|---|
| 1 | 0.60 | 0.80 | 0.90 | 1.00 |
| 2.5 | 1.50 | 2.00 | 2.25 | 2.50 |
| 5 | 3.00 | 4.00 | 4.50 | 5.00 |
| 7.5 | 4.50 | 6.00 | 6.75 | 7.50 |
| 10 | 6.00 | 8.00 | 9.00 | 10.00 |
| 15 | 9.00 | 12.00 | 13.50 | 15.00 |
| 25 | 15.00 | 20.00 | 22.50 | 25.00 |
| 50 | 30.00 | 40.00 | 45.00 | 50.00 |
| 75 | 45.00 | 60.00 | 67.50 | 75.00 |
| 100 | 60.00 | 80.00 | 90.00 | 100.00 |
Multiply any kVA rating by the column that matches your power factor to obtain the real power draw in kW.
KVA to kW FAQs
How many kW is 1 kVA?
Multiply 1 kVA by the applicable power factor. With unity power factor (1.0) the answer is 1 kW, while a typical 0.8 PF load only produces 0.8 kW.
At PF 1.0 -> 1.00 kW | At PF 0.80 -> 0.80 kW
What is 5 kVA in kW?
Use the main calculator or the chart above to multiply 5 kVA by your power factor. For PF 0.8 the result is 4 kW, and for PF 0.9 the result is 4.5 kW.
5 kVA x 0.80 PF = 4.0 kW
How do you convert 7.5 kVA to kW?
Find the load power factor, then multiply it by 7.5 kVA. For example, an inductive motor at PF 0.85 draws 6.38 kW, while a corrected PF 0.95 load draws 7.13 kW.
7.5 kVA x PF 0.85 = 6.38 kW
How many kW is 100 kVA 3-phase?
The same formula applies to single- or three-phase loads: multiply 100 kVA by the operating power factor. A PF of 0.9 equals 90 kW, and unity PF equals 100 kW.
100 kVA x 0.90 PF = 90 kW real output
Related Power Calculators
KVA to HP Calculator
Convert kVA to horsepower for accurate electrical load analysis.
Try CalculatorKVA to kVAR Calculator
Convert apparent power (kVA) into reactive power (kVAR) quickly.
Try Calculator