Your result
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Enter your values, then click Calculate result.How this calculator helps
Estimate the electricity impact of air-conditioner use with a practical cycling allowance. The result reports monthly units and expense while explaining why inverter AC consumption varies with temperature and room conditions.
How to use it
- 1
Use rated electrical input watts rather than cooling capacity in BTU or tons.
- 2
Estimate daily runtime during a representative month.
- 3
Enter an effective unit rate and compare with measured AC consumption when available.
Formula and methodology
Monthly units = rated input kW × daily runtime × 30 × average-load factor. This estimate uses a 70% average-load factor.
Uses the values you enter with transparent energy, power and efficiency relationships. Provider tariffs and equipment specifications should be replaced with current figures.
Worked calculation example
A 1,500 W AC used eight hours daily at a 70% average load consumes about 252 units monthly. At PKR 55 per unit, the energy portion is about PKR 13,860.
How to interpret your result
Estimate monthly AC units and expense using rated input power, daily runtime and effective electricity rate. Read the main result together with the supporting values rather than treating one number as a guarantee. The disclosed method is: Monthly units = rated input kW × daily runtime × 30 × average-load factor. This estimate uses a 70% average-load factor.
Input guide
Use rated electrical input watts rather than cooling capacity in BTU or tons.
Estimate daily runtime during a representative month.
Enter an effective unit rate and compare with measured AC consumption when available.
Scenario comparison
| Scenario | What it demonstrates |
|---|---|
| Worked baseline | A 1,500 W AC used eight hours daily at a 70% average load consumes about 252 units monthly. At PKR 55 per unit, the energy portion is about PKR 13,860. |
| Temperature setting check | Lower set points and extreme outdoor heat increase compressor workload. |
| Room heat gain stress test | Sun, roof exposure, windows, occupants and poor insulation increase consumption. |
Common mistakes to avoid
- Ignoring temperature setting: Lower set points and extreme outdoor heat increase compressor workload.
- Overlooking room heat gain: Sun, roof exposure, windows, occupants and poor insulation increase consumption.
- Failing to test maintenance: Dirty filters, low refrigerant and restricted airflow reduce efficiency.
Compare the result with a recent provider bill, the equipment nameplate and current NEPRA or distribution-company information.
What can affect the result?
Temperature setting
Lower set points and extreme outdoor heat increase compressor workload.
Room heat gain
Sun, roof exposure, windows, occupants and poor insulation increase consumption.
Maintenance
Dirty filters, low refrigerant and restricted airflow reduce efficiency.
Limits of this estimate
The estimate applies a fixed 70% average-load factor and cannot model a specific inverter control, climate, room or electricity slab bill.
Sources and review information
Frequently asked questions
Is the AC electricity cost calculator free?＋
Yes. SolvePilot tools are free, work in your browser, and require no account.
Does SolvePilot store my values?＋
No. Calculations run locally in your browser and the values you enter are not sent to a server.
Should I treat the result as an exact bill or quotation?＋
No. Results are informed estimates. Final charges can vary because of taxes, tariffs, lender terms, usage patterns, or provider rules.
How can I improve the accuracy?＋
Use recent values from your own bill, statement or institution, review every assumption, and confirm important results with the relevant official source.
Why use a load factor?＋
An inverter AC normally reduces power after approaching the set temperature instead of drawing full rated power continuously.