Your result
Click Calculate
Enter your values, then click Calculate result.How this calculator helps
Estimate how much one appliance contributes to your monthly electricity consumption. Enter its rated power, average daily runtime and the effective price per unit to compare air conditioners, fans, computers and other equipment on the same basis.
How Electricity Bills Are Calculated in Pakistan
Understand units, slabs, protected status, taxes and adjustments before estimating a Pakistan electricity bill.
Read the complete guide →How to use it
- 1
Find the appliance's rated watts or measure average power with an energy meter.
- 2
Estimate typical operating hours per day, accounting for appliances that cycle on and off.
- 3
Enter your effective per-unit rate and compare the result with total bill usage.
Formula and methodology
Monthly units (kWh) = appliance watts ÷ 1,000 × hours per day × 30. Estimated monthly cost = monthly units × price per unit.
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 1,200 W appliance used for six hours daily consumes about 216 units in a 30-day month. At PKR 55 per unit, its estimated energy cost is PKR 11,880.
How to interpret your result
Use the monthly units to identify appliances worth measuring or changing; the result is strongest for steady loads.
Input guide
Use measured watts or the appliance label's actual input.
Estimate daily runtime realistically, including duty cycle.
Enter an effective unit rate from a recent bill.
Scenario comparison
| Scenario | What it demonstrates |
|---|---|
| 100 W for 8 hours/day | about 24 kWh in 30 days. |
| 1,500 W heater for 2 hours/day | about 90 kWh monthly. |
| Inverter appliance | compare full-load and average-load scenarios. |
Common mistakes to avoid
- Using maximum rated power as constant consumption.
- Confusing watts with kilowatts.
- Ignoring standby use or cycling behaviour.
A plug-in energy meter provides a better input for variable appliances.
What can affect the result?
Duty cycle
Refrigerators and inverter ACs do not draw rated power continuously.
Tariff structure
The effective cost per unit can rise across slabs and additional charges.
Standby use
Some electronics consume a smaller amount even when apparently switched off.
Limits of this estimate
This estimate uses constant average watts and one effective unit rate; it does not reproduce slab billing, voltage variation or automatic cycling.
Sources and review information
Frequently asked questions
Is the appliance 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.
Is the wattage label always the actual consumption?＋
No. Many appliances cycle or change power by mode. A plug-in energy meter provides a better average.