Household electricity use calculator

Use meter readings or billed electricity covering a full year. Enter household size, floor area, the previous year’s consumption and old and new unit rates. Keep the boundary consistent: shared heating, EV charging or solar self-consumption can make otherwise similar homes difficult to compare.

Formula

Monthly use = annual kWh ÷ 12. Use per person = annual kWh ÷ occupants; use per m² = annual kWh ÷ area. Annual change = (current − previous) ÷ previous × 100. Tariff impact = annual kWh × (new rate − old rate).

Worked example

A household using 3,600 kWh annually averages 300 kWh per month. With three occupants and 90 m², that is 1,200 kWh per person and 40 kWh per m². These are descriptive ratios, not efficiency ratings.

What the result means

A negative year-on-year change means lower consumption. A positive tariff impact means higher energy spending at unchanged consumption. Check whether occupancy or electric heating changed before attributing a difference to efficiency.

Electricity price · India

₹8.00/kWh is an illustrative input, not an India-wide average or an official electricity tariff. Replace it with the applicable rate for your state, DISCOM, consumer category and consumption slab.

Last reviewed: 9 September 2026

Electricity duty, fuel or power purchase adjustments, fixed charges and subsidies depend on the applicable state and DISCOM rules. No national tax percentage or subsidy is assumed. Slab thresholds, sanctioned-load charges and time-of-day tariffs are not automatically modelled.

Assumptions and limits

Average months hide seasonal demand. The calculation excludes standing charges and does not automatically adjust for weather, household changes or billing estimates.

Questions answered

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