kW to kWh & kWh to kW Calculator
Quickly convert power in kilowatts (kW) to energy in kilowatt-hours (kWh) and energy back to power. Perfect for tracking household appliance consumption or sizing industrial loads.
Power and Energy Bidirectional Converter
How to Use the kW and kWh Converter
Follow these steps to convert between electrical power (kW) and energy consumption (kWh):
- 1Select Mode: Use the segmented control tabs to choose either kW to kWh or kWh to kW conversion.
- 2Enter Values: Depending on the mode, enter the active power rating in kilowatts (kW) or the cumulative energy consumed in kilowatt-hours (kWh).
- 3Define Runtime: Input the total operating duration in hours.
- 4Calculate: Press the Calculate button to view the converted parameters and equivalent units (Wh, Megajoules, Watts, or Horsepower).
How to Convert kW to kWh and kWh to kW
Electrical power (measured in kilowatts or kW) represents the instantaneous rate of energy transfer. Energy (measured in kilowatt-hours or kWh) is the cumulative quantity of work performed over a specific time duration. Multiplying active power by operating hours yields total energy consumption, while dividing total energy by operating hours yields the average active power load.
Real-Life Calculation Scenarios
Scenario A: Sizing Heating Equipment (kW to kWh): A homeowner runs a 10 kW heat pump unit continuously for a duration of 8 hours during a cold winter day. The total energy consumed in kWh is: kWh = 10 kW * 8 hours = 80.0 kWh In Megajoules (MJ), this energy equals: 80.0 kWh * 3.6 MJ/kWh = 288.0 MJ
Scenario B: Sizing Battery Discharge (kWh to kW): An off-grid solar storage battery discharges a total of 100 kWh of energy over a continuous duration of 5 hours to supply a workshop. The average power output delivered during this period is: kW = 100 kWh / 5 hours = 20.0 kW In horsepower (HP), this power rating is: 20.0 kW * 1.34102 ≈ 26.82 HP
Step-by-Step Manual Calculation Formula Guide
- 1. kW to kWh Formula:
Energy (kWh) = Power (kW) * Time (Hours)
- 2. kWh to kW Formula:
Power (kW) = Energy (kWh) / Time (Hours)
kW to kWh Conversion Reference Chart
Look up cumulative energy consumption values (kWh) across common equipment power levels and operating runtimes:
| Equipment Power (kW) | 1 Hour Runtime | 5 Hours Runtime | 12 Hours Runtime | 24 Hours Runtime |
|---|---|---|---|---|
| 1 kW | 1.0 kWh | 5.0 kWh | 12.0 kWh | 24.0 kWh |
| 2.5 kW | 2.5 kWh | 12.5 kWh | 30.0 kWh | 60.0 kWh |
| 5 kW | 5.0 kWh | 25.0 kWh | 60.0 kWh | 120.0 kWh |
| 10 kW | 10.0 kWh | 50.0 kWh | 120.0 kWh | 240.0 kWh |
| 20 kW | 20.0 kWh | 100.0 kWh | 240.0 kWh | 480.0 kWh |
| 50 kW | 50.0 kWh | 250.0 kWh | 600.0 kWh | 1,200.0 kWh |
| 100 kW | 100.0 kWh | 500.0 kWh | 1,200.0 kWh | 2,400.0 kWh |
kWh to kW Average Power Reference Chart
Look up average active electrical power capacity requirements (kW) based on energy totals (kWh) over standard operating durations:
| Energy Consumed (kWh) | 1 Hour Duration | 5 Hours Duration | 10 Hours Duration | 24 Hours Duration |
|---|---|---|---|---|
| 10 kWh | 10.0 kW | 2.0 kW | 1.0 kW | 0.42 kW |
| 50 kWh | 50.0 kW | 10.0 kW | 5.0 kW | 2.08 kW |
| 100 kWh | 100.0 kW | 20.0 kW | 10.0 kW | 4.17 kW |
| 250 kWh | 250.0 kW | 50.0 kW | 25.0 kW | 10.42 kW |
| 500 kWh | 500.0 kW | 100.0 kW | 50.0 kW | 20.83 kW |
| 1000 kWh | 1000.0 kW | 200.0 kW | 100.0 kW | 41.67 kW |
3 phase kw to kwh calculation
Determining energy usage in a three-phase system requires establishing active power (kW) from system electrical parameters before integrating over time. The active power formula is:
Once power is determined, conversion to energy uses the standard formula: kWh = kW * Hours. No additional three-phase multipliers are added during the time integration step.
10 kw to kwh
An electrical load drawing 10 kW of active power continuous load accumulates energy consumption as follows:
- Operating for 1 hour: 10 kW * 1 h = 10 kWh.
- Operating for 8 hours: 10 kW * 8 h = 80 kWh.
- Operating continuously for 24 hours: 10 kW * 24 h = 240 kWh.
100 kw to kwh
Operating a large 100 kW industrial motor or heating furnace consumes energy at a fast rate. Over typical shifts:
- Running for 1 hour consumes: 100 kW * 1 h = 100 kWh.
- Running for a standard 8-hour shift consumes: 100 kW * 8 h = 800 kWh.
- Running continuously for 24 hours consumes: 100 kW * 24 h = 2,400 kWh (2.4 MWh).
1000 kwh to kw
Converting 1000 kWh of energy capacity back to active power requires specifying the discharge or charging duration. Using the formula: kW = 1000 kWh / Hours:
- If discharged over 10 hours: 1000 kWh / 10 h = 100 kW of average power output.
- If discharged over 24 hours: 1000 kWh / 24 h = 41.67 kW of average power output.
- If discharged rapidly over 2 hours: 1000 kWh / 2 h = 500 kW of average power output.
100 kwh to kw
Converting 100 kWh of total energy consumption to power depends on the elapsed duration. Using the formula: kW = 100 kWh / Hours:
- If consumed over a 5-hour period: 100 kWh / 5 h = 20 kW of average power load.
- If consumed over a full 24-hour day: 100 kWh / 24 h = 4.17 kW of average power load.
Frequently Asked Questions (FAQs)
To convert active power in kilowatts (kW) to energy in kilowatt-hours (kWh), multiply the power value by the operating duration in hours: Energy (kWh) = Power (kW) * Time (Hours).
No, they represent different electrical metrics. Kilowatt (kW) measures active power (the instantaneous rate of energy consumption). Kilowatt-hour (kWh) measures energy (the total amount of work done over time). 1 kW of power running for exactly 1 hour consumes 1 kWh of energy.
There is exactly 1 kW in a kilowatt. The prefix 'kilo' means 1,000, so a kilowatt is equivalent to 1,000 watts of power.
Amps cannot be determined directly from kW without knowing system voltage and power factor. On a standard 120V AC single-phase circuit (1.0 PF), 1 kW draws: (1000 W) / 120 V ≈ 8.33 Amps. At 240V, it draws 4.17 Amps.
It depends on the time duration. Running an 8 kW load for 1 hour consumes 8 kWh. Running it for 10 hours consumes: 8 kW * 10 h = 80 kWh.
Kilowatts (kW) can be scaled to other power metrics, such as Watts (1 kW = 1000 W) or Horsepower (1 kW ≈ 1.341 HP). When multiplied by operating time, it converts to energy in kilowatt-hours (kWh).
