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AC Electricity Cost Calculator

Calculate how much your air conditioner adds to your monthly electricity bill based on AC tonnage, energy star rating, and daily hours.

Ton
0.75 Ton3 Ton
hrs
1 hrs24 hrs
₹
₹0.05₹1
2.85.5
Calculation Results
Monthly AC Power Cost
₹41.96
Estimated Monthly Draw: 233.1 kWh (70% compressor duty cycle)
Daily Running Expense
₹1.40
Seasonal 4-Month Cost
₹167.84
Capacity Evaluated
1.5 Ton AC
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How to use the AC Electricity Cost Calculator

  1. 1Select AC capacity tonnage (e.g. 1.0, 1.5, or 2.0 ton).
  2. 2Enter hours used per day.
  3. 3Enter electricity tariff rate per kWh.
  4. 4Optionally adjust Energy Efficiency Ratio (EER/ISEER).

How AC Running Cost is Calculated

1 ton cooling = 3,517 Watts of heat extraction. Electrical draw = (Tonnage × 3517) / EER. Factors in 70% typical compressor duty cycle.

Mathematical Formula
Power Draw (kW) = (Tons × 3.517 / EER) × 0.70 Daily Cost = Power Draw × Daily Hours × Rate
Formula Variables & Logic

Inverter ACs modulate compressor power, consuming less energy than fixed-speed units.

Worked Example: Running a 1.5 Ton Inverter AC 8 Hours a Day
Sample Calculation
Scenario: A 1.5 Ton AC with 3.8 EER run 8 hours/day at $0.18/kWh.
Step-by-step breakdown
  1. 1Effective Power Draw = (1.5 × 3.517 / 3.8) × 0.70 = 0.97 kW
  2. 2Daily Energy = 0.97 kW × 8 hours = 7.76 kWh/day
  3. 3Monthly Cost = 7.76 × 30 × $0.18 = $41.90/month
Estimated Result
Monthly AC electricity cost is $41.90.

What affects AC Running Cost results

  • Thermostat temperature setting: each degree Celsius higher saves approximately 6% on electricity bills.
  • Room insulation and window solar heat gain.
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Frequently Asked Questions

What temperature setting is most economical for an AC?

Setting your thermostat to 24°C (75°F) provides optimal human comfort while reducing energy consumption by 20-30% compared to 18°C.

How much energy does an inverter AC save compared to a non-inverter unit?

Inverter ACs modulate compressor speeds rather than switching on/off completely, saving between 30% and 50% electricity during continuous operating cycles.

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