Watt to kWh Calculator
Convert power in watts (W) to energy in kilowatt-hours (kWh).
Watt to Kilowatt-hour Converter
Common Watt to kWh Conversions
Click on these links to see instant conversions with common values:
Understanding Watt to kWh Conversion
Converting watts (W) to kilowatt-hours (kWh) involves understanding that kWh is a measure of energy consumed over a period of time, while W is a measure of power at a given instant.
Conversion Formula
Where:
• kWh = Energy in Kilowatt-hours
• Watts = Power in Watts
• hours = Time duration in hours
Key Concepts
- Watt (W): A unit of power, representing the rate at which electrical energy is consumed or produced.
- Kilowatt-hour (kWh): A unit of energy, representing the consumption of one kilowatt of power over one hour. It's commonly used for billing electricity consumption.
- Power: The rate at which energy is transferred or used.
- Energy: The capacity to do work.
Typical Power Consumption and Energy Usage
| Appliance | Power (Watts) | Hours Used | Approx. Energy (kWh) |
|---|---|---|---|
| LED Light Bulb | 10 | 10 | 0.1 |
| Laptop | 60 | 5 | 0.3 |
| Microwave Oven | 1000 | 0.25 | 0.25 |
| Refrigerator | 150 | 24 | 3.6 |
| Electric Vehicle Charger | 7200 | 4 | 28.8 |
Frequently Asked Questions
What is the difference between Watts and kWh?
Watts (W) is a unit of power, representing the rate of energy consumption at a specific moment. kWh (kilowatt-hour) is a unit of energy, representing the total amount of energy consumed over a period of time. Think of Watts as speed and kWh as distance traveled.
Why do I need time to convert Watts to kWh?
Kilowatt-hours are a measure of energy over time. To calculate the total energy consumed (kWh) from a power rating (Watts), you must multiply by the duration for which that power was used (hours) and then divide by 1000 to convert from Watt-hours to Kilowatt-hours.