🔸 Power in Watts
This is how much electricity your appliance uses.
For example:
A fan might be 75 watts
A fridge could be 150 watts
An AC might be 1500
🔸 Hours Per Day
How many hours do you use the appliance each day?
🔸 Number of Days
How many days in a month (usually 30 days).
🔸 Divide by 1000
Because electricity is charged in kilowatt-hours, not watt-hours:
1000 watts = 1 kilowatt
🔸 Rate per Unit
Electricity companies charge per kWh used. In India, the rate per unit (1 kWh) is usually ₹5 to ₹10, depending on your region and slab.