Energy Formula:
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Definition: This calculator converts power in kilowatts (kW) to energy in kilowatt-hours (kWh) based on the duration of usage.
Purpose: It helps determine energy consumption for electrical devices and systems over time.
The calculator uses the formula:
Where:
Explanation: Energy consumption equals power multiplied by time. One kWh equals one kilowatt of power used for one hour.
Details: This conversion is essential for electricity billing, energy efficiency analysis, and sizing electrical systems.
Tips: Enter the power consumption in kilowatts (kW) and the operating time in hours (h). Both values must be positive numbers.
Q1: What's the difference between kW and kWh?
A: kW measures power (rate of energy use), while kWh measures energy (power × time).
Q2: How do I convert watts to kW?
A: Divide watts by 1000 (1 kW = 1000W). Enter the kW value in this calculator.
Q3: Can I use minutes instead of hours?
A: Convert minutes to hours first (divide by 60). The calculator requires hours.
Q4: How accurate is this calculation?
A: It's precise for constant power draw. For variable loads, use average power.
Q5: Why is kWh used for electricity bills?
A: It measures total energy consumption, which determines the actual resource used.