Amps to kW Calculator

Power Calculation:

\[ kW = \frac{V \times I \times PF}{1000} \]

(For 3-phase, multiply by √3 ≈ 1.732)

Voltage (V):

Current (I):

Power Factor (PF):

(0 to 1)

Phase:

Power Result:

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1. What is the Amps to kW Calculation?

The Amps to kW calculation converts electrical current (amperes) to power (kilowatts) using voltage and power factor. It's essential for determining the actual power consumption or generation in electrical systems.

2. How Does the Calculator Work?

The calculator uses the power formula:

\[ kW = \frac{V \times I \times PF}{1000} \]

For three-phase systems, multiply by √3 (approximately 1.732):

\[ kW = \frac{V \times I \times PF \times \sqrt{3}}{1000} \]

Where:

\( V \) — Voltage (volts)
\( I \) — Current (amperes)
\( PF \) — Power factor (unitless, 0 to 1)
1000 — Conversion factor from watts to kilowatts
√3 — Phase multiplier for three-phase systems

Explanation: The power factor accounts for the phase difference between voltage and current in AC systems. In purely resistive loads, PF = 1.

3. Importance of Power Calculation

Details: Accurate power calculation is crucial for electrical system design, load balancing, energy efficiency assessment, and proper equipment sizing.

4. Using the Calculator

Tips: Enter voltage in volts, current in amps, and power factor (0 to 1). Select single-phase or three-phase system. All values must be valid (voltage > 0, current > 0, 0 ≤ PF ≤ 1).

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power, representing how effectively current is converted to useful work (range 0 to 1).

Q2: Why multiply by √3 for three-phase?
A: In balanced three-phase systems, the total power is the sum of power in all three phases, which mathematically works out to √3 × line voltage × line current × PF.

Q3: What's typical power factor value?
A: Resistive loads (heaters, incandescent lights) have PF=1. Motors typically 0.8-0.9. Electronic loads often 0.6-0.7 unless corrected.

Q4: Can I use this for DC circuits?
A: Yes, for DC set PF=1 (no phase difference) and use single-phase option (DC has no phases).

Q5: How accurate is this calculation?
A: The calculation is mathematically precise, but accuracy depends on your input measurements of voltage, current, and power factor.