Watts to kWh Calculator

What is a Watts to kWh Calculator?

A Watts to kWh (kilowatt-hour) Calculator is a tool that converts power consumption in watts over a specified time period into energy consumption in kilowatt-hours. This is useful for understanding electricity usage and estimating energy costs.

The Formula

The formula for converting watts to kilowatt-hours is:

\[kWh = \frac{W \times h}{1000}\]

Where:

• kWh is energy in kilowatt-hours
• W is power in watts
• h is time in hours
• 1000 is the conversion factor (1 kilowatt = 1000 watts)

Understanding Watts and Kilowatt-hours

Watts (W) measure power - the rate at which energy is consumed.

Kilowatt-hours (kWh) measure energy - the total amount of electricity used over time.

For example:

• A 100W light bulb running for 10 hours uses 1 kWh of energy (100 × 10 / 1000 = 1 kWh)
• A 2000W appliance running for 2 hours also uses 4 kWh of energy (2000 × 2 / 1000 = 4 kWh)

This calculator helps you easily convert between these units, which is particularly useful for estimating electricity costs or comparing the energy efficiency of different appliances.