Conversion using the Watts to Kwh Formula
How to Calculate Kwh from Real Power watts and Time hours using AC Phase current.
Energy E in Kilowatt-hours Kwh is calculated as the Real Power p In watts w, times the period t in hours hrs. Plug these values into the formula:
For Example, Let’s find the KWh of 2000w for 5 hours.
Suggested Reading
- Amperage to KW Conversion Calculator
- Amperage to VA Conversion Calculator
- KW to KVA Conversion Calculator
- Wattage to kwh Conversion Calculator
- KVA to VA Conversion Calculator
- Wattage to VA Conversion Calculator
- Wattage To Amperage Conversion Calculator
- Wh to Wattage Conversion Calculator
- Joules to Voltage Conversion Calculator
- KVA to KW Conversion Calculator
- Voltage to Wattage Conversion Calculator
- Wattage to KVA Conversion Calculator
- Amperage to Wattage Conversion Calculator
- KW to Wh Conversion Calculator
- Joules to KW Conversion Calculator
- VA to Wattage Conversion Calculator
- eV to Voltage Conversion Calculator
- Wh to KW Conversion Calculator
How to use Watts to Kwh Calculator?
To use the above "Watts to Kwh Conversion Calculator" follow the below steps:
1. Enter Real Power: Input the Real Power in watts or Load watts value in the specific input box. You can enter the value in millivolts mw, Watts W, kilowatts KW, & Megawatts MW by choosing the appropriate option from the dropdown.
2. Enter Time: Input the time in Seconds sec value in the specific input box. You can enter the value in Seconds, or Hours by choosing the appropriate option from the dropdown.

3. Reset: Click the Reset If you want to reset the calculator to perform another conversion, you can click the Reset button, and all input fields will be cleared.
4. Calculate: Click the Calculate button to obtain the results. The calculated results will be displayed in the Results: section.
5. Swap: If you want to Swap the calculated to Exchange conversion, you can click the Swap button, and Calculate will be Exchange.
6. Result: The calculated "Result" will be displayed in the respective Result In output KWh output field.
Watts to Kwh conversion application
- Input Fields: Users enter Real Power watts and time hours.
- Real-Time Calculation: Converts Watts to Kwh instantly as the user enters the value.
- Clear Results Display: Displays the calculated Kwh clearly after clicking "Calculate".
Watts to Kwh Conversion Chart
Input | Output | |||
---|---|---|---|---|
Watts (W) | 1 Hour (KWh) | 2 Hours (KWh) | 5 Hours (KWh) | 10 Hours (KWh) |
100 | 0.1 | 0.2 | 0.5 | 1 |
500 | 0.5 | 1 | 2.5 | 5 |
1000 | 1 | 2 | 5 | 10 |
2000 | 2 | 4 | 10 | 20 |
5000 | 5 | 10 | 25 | 50 |
Frequently Asked Questions - FAQs for Watts to KWh Calculator
Since a watt is a relatively small unit of electricity, it is common for it to be measured in multiples, like a kilowatt (kW). A kilowatt, as we mentioned, is just 1,000 watts (W).
Energy is defined as the product of power and time. For constant value, it is expressed as: energy = power × time
Kilowatts-hour (kWh) is the unit used to express the energy (E) consumption of an appliance or load.
2 kilowatt-hour is defined as the amount of work done or energy consumed when a device of Real power kilowatt is used for 2 hours at rated voltage. It is the measurement of electrical energy equivalent to the Real power (P) consumption.
12 unit of electricity = 12 kWh. The electricity used is generally charged for in 'unit of electricity'. Killowatt-hours is the product of watts × time (1 kilowatt = 1000 watts). A 4-kilowatt heater switched on for 3 hours will have used 12 kilowatt-hours of electricity.