Energy

AC Electricity Cost Calculator

Enter your air conditioner’s average power draw, daily hours, and electricity rate to estimate daily, monthly, and full-season cooling energy and cost. An estimate from average draw — compressors cycle, weather varies, and insulation matters.

Last updated: September 30, 2026

Your result · Monthly cooling cost

₹2,304.00

Season cost: ₹9,216.00
Monthly energy: 288kWh

Daily energy: 9.6kWh
Season energy: 1,152kWh

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What your result means

Monthly cooling cost is the headline: what the AC adds to a summer month at your rate. Season cost multiplies across your cooling months for the budgeting figure that matters.

Energy figures in kWh let you compare against the meter — if the AC line dwarfs everything else, thermostat and insulation beat a new unit.

How the calculation works

Multiply average watts by cooling hours and divide by 1,000 for daily energy.
Scale by days for the month and by cooling months for the season.
Multiply each energy figure by your per-kWh rate for costs.

Formula

daily kWh = watts × hours ÷ 1000; monthly = daily × days; season = monthly × months; cost = energy × rate

Daily energyaverage watts × cooling hours ÷ 1000
Monthlydaily energy × days
Seasonmonthly energy × cooling months
Costenergy × electricity rate

Worked examples

Example: 1,200 W, 8 h/day, 30 days, 4-month season at 8/kWh
powerWatts: 1200hoursPerDay: 8daysPerMonth: 30monthsPerYear: 4rate: 8currency: INR
Result: Daily energy 9.6 · Monthly energy 288 · Monthly cooling cost $2,304.00 · Season energy 1,152 · Season cost $9,216.00
Example: efficient 800 W inverter, 6 h/day, year-round tropics
powerWatts: 800hoursPerDay: 6daysPerMonth: 30monthsPerYear: 12rate: 8currency: INR
Result: Daily energy 4.8 · Monthly energy 144 · Monthly cooling cost $1,152.00 · Season energy 1,728 · Season cost $13,824.00

Assumptions

What this calculation takes for granted — check these before relying on the result.

Assumptions:

Default values are an example 1,200 W unit running 8 hours — replace with your draw and hours.
Draw is treated as a flat average; inverter ramping and thermostat cycling are averaged in.
One flat rate applies; peak summer surcharges are not modelled.
Currency selection changes display only; it does not fetch tariffs.

Limitations

Why your real figure may differ:

Nameplate wattage is a maximum — real draw follows load, thermostat setting, and outdoor temperature.
Poor insulation, leaky rooms, and heat-generating appliances raise consumption beyond the average.
1 ton of cooling ≈ 1,000 W as a rough rule only; EER/SEER ratings shift real draw substantially.
Fixed charges and slab tariffs mean this is not your exact bill.

Frequently asked questions

How many watts does a 1.5-ton AC use?

Roughly 1,200–1,800 W while the compressor runs, less for inverter models at part load — about 1,000 W per ton is only a rule of thumb. Your manual or a plug meter gives the real figure; enter an average, not the maximum.

Why does my AC bill spike in peak summer?

Hotter outdoor temperatures force longer compressor runs at higher draw, often onto costlier tariff slabs at the same time. Both effects multiply — the average hides them.

Does a higher thermostat setting really save much?

Yes — each degree closer to outdoor temperature cuts compressor runtime noticeably. Fans, shading, and sealed rooms multiply the saving.

Inverter vs non-inverter — does it matter here?

Inverter units ramp down instead of cycling on/off, so their average draw sits lower for the same cooling. Enter a lower average wattage to reflect that.

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