Electricity Bill Calculator
See how many units each appliance uses, what your bill will be, and which changes save the most.
At a glance
- Add your appliances from a list of 30 common ones — ACs, fridges, fans, geysers, TVs, pumps, EV chargers — with typical wattage, or your own.
- Works out units (kWh) a month for each: watts × how many × hours a day × days ÷ 1,000.
- Prices the units with one rate or your company’s slab tariff (each rate only on the units in its slab), plus fixed charges, duty and surcharges.
- Shows what uses the most, as a share of the bill — usually the AC, geyser or water pump.
- Suggests savings with real numbers: BLDC fans, inverter ACs, and the AC temperature.
- Your list and tariff are remembered on this device. Nothing is uploaded.
Step by step
How to calculate your electricity bill
- 1
List your appliances
Add each appliance, how many you have, and how long each runs a day.
- 2
Enter your tariff
Use one price per unit, or copy the slabs from your electricity company’s tariff.
- 3
Add charges
Fixed charge, electricity duty and any surcharge from your bill.
- 4
Read the bill
See the monthly units, the bill and which appliances cost the most.
Features
Everything you need, nothing you don’t
30 appliances
Typical wattage, editable.
Units per appliance
Hours a day and days a month.
Slab tariffs
Telescopic slabs, fixed charges, duty.
Biggest users
Share of the bill for each.
Saving tips
BLDC fans, inverter AC, thermostat.
Remembers your home
Saved on this device.
How to work out units
Units (kWh) = watts × hours ÷ 1,000. A 1,500 W AC running 8 hours uses 12 units a day — about 360 a month. A 75 W fan for 10 hours uses 0.75 units a day, or 22.5 a month. Fridges cycle on and off, so a typical double-door fridge averages about 60 W — some 43 units a month.
Typical monthly use
| Appliance | Use | Units a month |
|---|---|---|
| 1.5-ton inverter AC | 8 hours a day | about 265 |
| Geyser 2,000 W | 1 hour a day | 60 |
| Double-door fridge | all day | about 43 |
| Ceiling fan | 10 hours a day | 22.5 (BLDC: about 10) |
| LED TV 32" | 5 hours a day | 6 |
| LED bulb 9 W | 6 hours a day | 1.6 |
FAQ
Frequently asked questions
How many units does an AC use?
How do slab tariffs work?
Why is my real bill different?
Does a TV or charger on standby use electricity?
Are BLDC fans worth it?
Should I install solar panels?
Keep going
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