Appliance electricity cost calculator
Enter wattage and daily run-hours for any appliance to see exact cost per day and per month at the current Bangladesh tariff. Covers single appliances and full-home loads.
Calculator
Default ৳9.10 = LT-A residential 201–300 unit slab
Cost / hour
৳ 12.74
Cost / day
৳ 101.92
Cost / month
৳ 3057.60
Roughly 11.20 units/day · 336.0 units/month
Watts, hours, and the real cost of every appliance
Wattage × hours ÷ 1000 = units (kWh). Multiply by your tariff to get the taka. Here's why the printed wattage isn't always what you pay for.
The essentials
- Rated wattage on the sticker is the maximum — most appliances average lower in real use
- Bangladesh tariff is slab-based, so adding one appliance can push your whole bill into a higher slab
- AC, fridge, and water heater account for 70%+ of most residential bills
The math
How cost is calculated
Every appliance pulls a certain wattage when on. That wattage, multiplied by the hours you use it, gives the energy it consumes in watt-hours. Divide by 1000 and you have kilowatt-hours(kWh) — what your meter measures and your bill calls “units.”
A 1,400 W inverter AC running 8 hours a day uses 1400 × 8 ÷ 1000 = 11.2 units per day, or 336 units per month. At ৳9.10/unit that’s ৳3,058 a month — from a single appliance.
Important nuance
Rated wattage vs running wattage
The wattage printed on the appliance is its rated wattage — what it draws at maximum load. An inverter AC labelled 2,200 W can spend most of its run-time at 700–1,100 W once the room has cooled. Refrigerators behave similarly: a 150 W average is realistic even though the compressor briefly hits 400+ W on every cycle.
Reference table
Typical wattages in a Bangladesh home
| Appliance | Wattage | Daily hours | Units/month |
|---|---|---|---|
| LED bulb 9W | 9 W | 6 h | ~1.6 |
| Ceiling fan | 75 W | 10 h | ~22.5 |
| 32" LED TV | 50 W | 5 h | ~7.5 |
| Refrigerator (14 cu.ft) | 150 W avg | 24 h | ~108 |
| 1.5-ton inverter AC | 1,400 W | 8 h | ~336 |
| Electric geyser | 2,000 W | 1 h | ~60 |
| Water pump (1 HP) | 746 W | 1 h | ~22.4 |
| Iron | 1,000 W | 0.5 h | ~15 |
When this calculator matters
Real-world use cases
Buying a new AC
Diagnosing a bill jump
Geyser vs gas
Frequently asked questions
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