Online Calculators & Tools




Watts to kWh Conversion Calculator

Power in watts (W) to energy in kilowatt-hours (kWh) calculator and calculation formula.

How to calculate :- Enter the power in watts, consumption time period in hours and press the Calculate button:



Enter power in watts: W
 
Enter time in hours: hr
 
   
 
Energy result in kilowatt-hours: kWh



Watts to kWh calculation formulas

The energy E in kilowatt-hours (kWh) is equal to the power P in watts (W),

times the time period t in hours (hr) divided by 1000:

E(kWh) = P(W) × t(hr) / 1000