Home & Construction · Home Energy
Electricity Bill & Appliance Cost Calculator
List your appliances with their wattage and daily hours to see the units (kWh) each uses and your monthly electricity bill — at a flat rate per unit or your state's telescopic slab tariff, plus fixed charges and electricity duty. See which appliances cost the most to run.
Your inputs
Quick start — try a typical case
Watts are on the appliance's label. For fridges and ACs the compressor cycles on and off — the typical average draw is lower than the rated watts.
Your result Live
Estimated Bill for 30 Days
₹4,363
580 units (kWh) · energy ₹4,060 + duty ₹203 + fixed ₹100
- Units Used
- 580 kWh · 19.33 a day
- Average Cost per Unit
- ₹7
- Yearly Cost (at this usage)
- ₹53,080
- Biggest User
- 1.5-ton inverter AC: 264 kWh (₹1,848)
- 1.5-ton inverter AC · 46%264 kWh
- Ceiling fan · 19%108 kWh
- Refrigerator · 19%108 kWh
- Geyser · 11%60 kWh
- Washing machine · 3%15 kWh
- LED bulb · 2%13 kWh
Cost by appliance
7 rows1 unit = 1 kWh = 1,000 watts for one hour. Rated watts are the maximum: fridges, ACs and geysers cycle on and off, so real use is usually lower.
Tariffs, fixed charges and duty vary by state, connection type and season — check your latest bill or your electricity board's tariff order.
An estimate from the assumptions you entered, not a guaranteed outcome.
How this is calculated
Units (kWh) = watts × quantity × hours a day × days ÷ 1,000 · Bill = energy charge + duty + fixed charge
- Slab tariff
- Telescopic: the first slab's rate applies to the first units, the next rate to the next units, and so on
- Duty
- Electricity duty or tax as a % of the energy charge
Electricity is billed in units — kilowatt-hours. An appliance's energy use is its power (watts) multiplied by the hours it runs; divide by 1,000 to get kWh. Most Indian states charge a slab (telescopic) tariff where the rate rises as you use more, plus a fixed charge and electricity duty.
Assumptions & sources
- Appliances draw their rated watts while on (an upper estimate for cycling appliances).
- One billing period of the given length; no time-of-day pricing or subsidies.
- 1Standards & Labelling — appliance energy consumption — Bureau of Energy Efficiency, India
- 2State electricity regulatory commissions — tariff orders — Forum of Regulators / CERC
Calculator ID HOME-ELEC-001 · version 1.0.0
Common questions
How many units does a 1.5-ton AC use?
A 1.5-ton inverter AC draws roughly 0.8–1.5 kW when running hard, so 8 hours a night uses around 7–10 units — about 200–300 units a month.
How do I calculate electricity units?
Watts × hours ÷ 1,000. A 75 W fan running 12 hours uses 0.9 units a day, 27 units a month.
Why is my bill higher than units × rate?
Slab tariffs charge more for higher usage, and the bill adds fixed or meter charges and electricity duty.