Energy Formula:
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Definition: This calculator converts power in kilowatts (kW) to energy in kilowatt-hours (kWh) based on operating time.
Purpose: It helps determine energy consumption for electrical devices, systems, or entire facilities over a period of time.
The calculator uses the formula:
Where:
Explanation: Energy consumption equals power multiplied by time. 1 kWh equals 1 kW of power used for 1 hour.
Details: This conversion is essential for electricity billing, energy efficiency analysis, and sizing renewable energy systems.
Tips: Enter the power in kilowatts and the operating time in hours. Both values must be > 0.
Q1: What's the difference between kW and kWh?
A: kW measures power (rate of energy use), while kWh measures energy (total consumption over time).
Q2: How do I convert kWh back to kW?
A: Divide kWh by hours to get average kW during that period.
Q3: What's a typical household appliance's power?
A: Refrigerator: 0.1-0.2 kW, Microwave: 1-1.5 kW, AC unit: 3-5 kW.
Q4: How does this relate to electricity bills?
A: Most utilities charge by kWh consumed. This calculator helps estimate costs.
Q5: Can I use this for solar panel calculations?
A: Yes, to estimate energy production (kW rating × sun hours = kWh output).