Appliance Electricity Cost Calculator
Find how much electricity a single appliance uses and what it adds to the monthly bill from its wattage and running hours.
Recent
Formula
How the calculation works
The calculator divides the wattage by one thousand to convert it into kilowatts.
It multiplies those kilowatts by the daily running hours and the number of days to get the units of electricity used.
Multiplying the units by the rate per unit gives the monthly cost, and dividing by the days gives the daily cost.
Common mistakes
- Assuming the appliance runs at full wattage all the time, since a fridge or air conditioner cycles on and off and uses less.
- Forgetting standby and idle use, which keeps a small but steady draw on the meter even when the appliance is not in active use.
When to use it
- Families use it to see which appliance is driving the bill before deciding what to switch off or replace.
- Buyers use it to compare a new fan, fridge or heater against the old one using its rated wattage.
Worked example
A 1000 watt appliance running 2 hours a day for 30 days uses 60 kWh, and at 8 taka per unit the monthly cost is 480 taka and the daily cost is 16 taka.
Common questions
Is one unit the same as one kWh?
Yes, one unit of electricity on a Bangladesh bill is one kilowatt hour, which is a thousand watts used for one hour.
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