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Solar & Electricity Calculator
Planning estimates, reviewed October 2026 — flat-rate math on your figures, not DISCOM slabs or a site survey. Confirm tariffs and sizing with your bill and vendor.
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Electrical energy in bill units (kWh) is power in kilowatts × hours of use: a 2 kW appliance running 3 hours consumes 6 units — the same “units” the meter records and the bill charges for. Kilowatts are the rate of use; kilowatt-hours are the amount used, and this page converts the first into the second.
Divide the appliance's watt rating by 1000 to get kilowatts, then enter genuine running hours — a 2 kW geyser on for 3 hours is 6 units, but one idling on standby sips far less. For a whole home, add each major load's kWh (or read monthly units off the bill ÷ 30) rather than guessing one big number.
It does not price the energy, apply slab tariffs, or measure what you actually drew — it converts rated load and hours into units, with the meter as the final word.
Rated load × hours — the meter is the final word.
Yes. On an electricity bill, one 'unit' is one kilowatt-hour.
Multiply units by your per-unit tariff, or use the electricity bill estimator.
Standby loads, devices you forgot, and cycling appliances running longer than assumed all add up — audit room by room with the appliance tool for the missing units.
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