Amps to Kilowatts Calculator
Convert amps to kilowatts using the formula: kW = (A × V) ÷ 1,000
DC for batteries and electronics, AC for household and commercial use
Electric current in amperes
Electrical potential difference
Formula: Kilowatts = (Amps × Volts) ÷ 1,000
Calculation Result
Power Type
DC
Amps
10.00
Current
Volts
120.00
Potential
PF
0.95
Power Factor
Total Power
1.20 kW
1,200.00 watts
Power Summary
Total Kilowatts
1.20
1,200.00 watts
Input Values
Common Voltages
Frequently Asked Questions
What is the difference between Watts and Kilowatts?
Watts (W) is the base unit of power measurement. Kilowatts (kW) is 1,000 watts, commonly used for measuring larger power systems. For example, 5,000 watts = 5 kilowatts. Kilowatts are typically used to measure household appliances, industrial equipment, and electrical billing.
What is the formula for converting Amps to Kilowatts?
For DC circuits: Kilowatts = (Amps × Volts) ÷ 1,000. For single-phase AC: Kilowatts = (Amps × Volts × Power Factor) ÷ 1,000. For three-phase AC: Kilowatts = (√3 × Amps × Volts × Power Factor) ÷ 1,000. All formulas first calculate watts, then divide by 1,000 to convert to kilowatts.
How do I convert between Watts and Kilowatts?
To convert watts to kilowatts, divide by 1,000. For example: 5,000 W ÷ 1,000 = 5 kW. To convert kilowatts to watts, multiply by 1,000. For example: 3 kW × 1,000 = 3,000 W. This is the simplest power conversion you'll encounter.
Why is kilowatts used instead of watts in home electricity billing?
Electricity bills are measured in kilowatt-hours (kWh), which represents the energy used over time (kilowatts × hours). Using kilowatts simplifies billing since household appliances consume 0.5-10+ kW. For example, a 100W LED bulb uses 0.1 kW, making it easier to track consumption and costs with kilowatt measurements.
What are typical power consumptions in kilowatts for household appliances?
Common household appliances: LED light bulb (0.01 kW), refrigerator (0.5-0.9 kW), microwave (1.0-1.5 kW), air conditioner (3-5 kW), electric water heater (4-6 kW), electric range (8-15 kW), heat pump (5-8 kW). Industrial equipment ranges from 10 kW to several megawatts.
What is power factor and why does it matter for kilowatts?
Power factor (PF) is the ratio of real power (kilowatts) to apparent power. It ranges from 0 to 1, with 1.0 being ideal. For AC systems, lower power factors mean more current is needed to deliver the same kilowatts, increasing energy costs and heat in wiring. Most equipment has a PF of 0.85-0.95.
Pro Tips
- • One kilowatt equals 1,000 watts. If you calculate watts first, simply divide by 1,000 to get kilowatts.
- • Electricity meters track kilowatt-hours (kWh). A 5 kW appliance running for 2 hours uses 10 kWh of energy.
- • Most residential circuits use 120V or 240V. Higher voltage circuits use lower amperage for the same power output.
- • Industrial three-phase systems are more efficient than single-phase for power transmission over long distances.
- • When sizing circuit breakers and wiring, always include a safety margin above calculated kilowatts (typically 125% minimum).
- • Power company charges are based on kWh consumed. Monitor kilowatt usage to reduce electricity bills effectively.
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