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AC Electricity Consumption Calculator

Air conditioning is the biggest summer electricity cost for most homes. Pick your AC size and type, set the hours you run it, and see the monthly units and cost.

Updated

watts

Check the label on your appliance for an exact figure.

hours
days
PKR/kWh

Example rate. Divide the total of your last bill by the units used to get your real rate.

Result

Rs 22,440 / month

AC 1.5 ton (non-inverter): 408 units/month ≈ Rs 22,440

Monthly units (kWh)
408
Cost per hour of use
Rs 93.50
Daily cost
Rs 748.00
Yearly cost (same usage)
Rs 269,280 (2.69 lakh)
  • Air conditioners, fridges and freezers cycle on and off, so average draw is lower than the label maximum. Inverter models vary most with temperature and thermostat setting.
  • Tariffs change with slabs, fuel adjustments and taxes, so check your latest bill for your actual rate per unit.

Formula

Units/month = Average watts × Hours/day × Days ÷ 1000

Inverter AC presets use an average running power, which is lower than the maximum on the label. Actual use depends on room size, insulation, outside temperature and thermostat setting.

Examples

  • 1.5 ton non-inverter, 8 h/day

    AC 1.5 ton (non-inverter): 408 units/month ≈ Rs 22,440

  • 1.5 ton inverter, 8 h/day

    AC 1.5 ton (inverter, average): 228 units/month ≈ Rs 12,540

  • Two 1 ton inverters, 10 h/day

    2 × AC 1 ton (inverter, average): 390 units/month ≈ Rs 21,450

Important information

  • Setting the thermostat to 26 °C instead of 22 °C can noticeably reduce consumption.
  • Clean filters and a shaded outdoor unit help efficiency in Pakistani summers.
  • Electricity tariffs in Pakistan change often and depend on your DISCO (LESCO, IESCO, K-Electric, MEPCO, etc.), monthly slab, protected/unprotected status, fuel price adjustment and taxes. That is why the rate is always an input — pre-filled with an example of Rs 55 per unit.
  • To find your real all-in rate, divide the total amount on your latest bill by the units consumed.
  • Since 2026, domestic bills also include a fixed monthly charge based on sanctioned load (kW), in addition to the per-unit charge — add it as a fixed charge in the bill estimator.

Frequently asked questions

How many units does a 1.5 ton AC use per hour?

A non-inverter 1.5 ton AC uses about 1.5–1.8 units per hour while the compressor runs. An inverter model averages roughly 0.8–1.1 units per hour once the room is cool.

How many units does an AC use per month?

A 1.5 ton non-inverter AC run 8 hours a day uses roughly 400 units a month; an inverter model around 230 units. Real figures vary a lot.

Is a DC inverter AC worth it?

If you run the AC many hours a day, the savings usually repay the higher price within a few summers.

What does 'ton' mean for an AC?

Cooling capacity: 1 ton = 12,000 BTU per hour. It is not the same as power consumption.

Learn more

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