Electricity Bill Calculator
Estimate appliance energy usage in units and its cost on your bill.
| Appliance | Watts | Hrs/day | Qty | Cost | |
|---|---|---|---|---|---|
| ₹2,880 | |||||
| ₹1,152 | |||||
| ₹138 |
Estimated bill
₹4,270
Total units
521 kWh
Energy cost
₹4,170
Biggest energy users
⚡Estimate your whole home's bill
Most bill calculators only handle one appliance. This one lets you build a full list of everything in your home — add from common presets or your own devices — and instantly see the estimated bill, the total units (kWh) used, and, most usefully, which appliances are quietly draining the most money.
🔍Find your energy hogs
- Add each appliance with its wattage, hours of use per day, and quantity.
- The result ranks appliances by cost so you can see where the money goes.
- Adjust the billing days, per-unit tariff, and any fixed charge to match your bill.
- Try cutting an appliance's daily hours to see the saving before you change a habit.
🧮The formula
A “unit” of electricity is one kilowatt-hour (kWh) — a 1,000-watt device running for one hour. Divide watt-hours by 1,000 to get units, multiply by your tariff, and add any fixed charge to get the bill.
💡Cut your bill
- Heating and cooling (AC, geyser, heater) usually dominate — target these first.
- Swap high-wattage bulbs for LEDs; the wattage drop is dramatic.
- Unplug or switch off standby devices — they add up over a month.
- Set the AC a degree or two higher and watch the estimate fall.
💡 Frequently Asked Questions
How is an electricity bill calculated?+
Units (kWh) = Watts × Hours/day × Quantity × Days ÷ 1000, then Bill = Units × Rate per unit + any fixed charge. One unit is one kilowatt-hour.
Can I estimate my whole home, not just one device?+
Yes. Add as many appliances as you like from the presets or manually — the calculator totals the units and cost and shows which appliances cost the most.
What is a 'unit' of electricity?+
A unit is one kilowatt-hour (kWh) — the energy used by a 1,000-watt appliance running for one hour. Your tariff is charged per unit.
Which appliances use the most power?+
Anything that heats or cools — air conditioners, water heaters, and electric heaters — plus always-on devices like refrigerators. The result panel ranks your appliances by cost.