Worked example
A 100W appliance running 4 hours/day in Tamil Nadu uses about 0.4 units/day and costs roughly ₹81.00/month.
Calculate your appliance's cost
Appliance Electricity Cost Calculator
Any appliance, from its wattage and daily hours
Estimated monthly cost
₹117.00
≈ ₹1,423.50/year · 12 units/month
- Units/day
- 0.4
- Billed at (top slab)
- ₹9.75/unit
Typical appliance wattage — reference only
These are commonly published ranges to help you sanity-check a figure — always use the wattage printed on your specific appliance for an accurate calculation.
| Appliance | Typical wattage |
|---|---|
| LED bulb | 5–15 W |
| Laptop | 40–65 W |
| LED TV (42") | 60–120 W |
| Washing machine | 350–700 W |
| Microwave oven | 900–1500 W |
| Electric iron | 1000–1600 W |
| Water heater (geyser) | 1500–3000 W |
| Mixer/grinder | 300–750 W |
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Frequently asked questions
How do I find my appliance's wattage?
It's printed on a rating plate or sticker on the appliance itself, or in the box/manual — usually labelled "Power" or "Rated Wattage" in W.
Does this work for appliances we already have a dedicated calculator for, like AC or fridge?
It can, but our dedicated AC, ceiling fan and fridge calculators use more accurate methodology — ISEER for AC, and the BEE label figure for fridges — so use those where available. This generic tool is for everything else.
Why is the appliance priced at my top tariff slab?
Indian electricity tariffs are telescopic — any appliance you add sits on top of your existing consumption, so its units land on your highest slab, not a blended average rate.