Appliance load estimator
Find out how many units a device uses: units (kWh) = watts × hours per day × days ÷ 1000.
How a Pakistani electricity bill is built
Your bill starts with the units shown on the meter, charged at the slab rate for that consumption band. Fixed charges and any fuel or quarterly adjustment per unit are added, then GST and electricity duty are applied on top. Some bills also carry other charges such as arrears or surcharges for late payment. Because rates differ by band, using one average rate is an approximation: divide the energy charge on your bill by the units to get your own average.
How to use the calculator
- Enter the units from your last bill, or the units you expect.
- Type the average rate and any per-unit adjustment printed on the bill.
- Check GST and duty percentages against your bill and adjust if needed.
- Use the appliance estimator to see what an air conditioner, geyser or iron adds to your units.
Practical ways to cut your bill
Air conditioning is usually the biggest load. Setting it to 26°C instead of 22°C, using an inverter model, cleaning filters and shading windows can reduce consumption noticeably. Switching to LED lighting and checking for always-on devices helps year-round. Keeping consumption just under a slab boundary can matter, so look at the slab table printed on your own bill. Households with solar net metering should read their distribution company's current terms before sizing a system.
Worked example
With 300 units at an average Rs 35 per unit, energy charges are Rs 10,500. Adding 18% GST (Rs 1,890) and 1.5% duty (Rs 158) gives a bill of about Rs 12,548, or roughly Rs 41.8 per unit all-in. A fuel adjustment of Rs 2 per unit would add Rs 600 before taxes. The rate here is only an example; replace it with the average from your own bill.
Reading your bill
- Units consumed: the difference between the current and previous meter reading.
- Slab or tariff: the rate band your consumption falls into.
- Adjustments: fuel price and quarterly adjustments added per unit.
- Taxes: GST, electricity duty and other levies.
- Arrears and late payment surcharge: shown separately.
Ways to reduce consumption
Set the air conditioner to 26 degrees, service filters, use inverter models, switch to LED lights, and unplug unused chargers. Use the appliance estimator above to see the units each device adds, then multiply by your rate. A 1,500 W AC running 8 hours daily uses about 360 units in a month, which is more than the rest of an average household combined.
Related tools
Convert watts and kilowatts with the unit converter, budget the bill against your take-home salary, and work out tax percentages with the percentage calculator. If you run a small business from home, the invoice generator and profit calculator help you cover utility costs in your prices.
Frequently asked questions
Why is my bill higher than the energy charges?
Taxes, fixed charges and per-unit adjustments are added to the energy charge. GST and duty alone can add a fifth or more.
How do I find my per-unit rate?
Divide the energy charges on your bill by the units consumed. Use that average as the rate.
Can I calculate the bill for a different month?
Yes. Enter that month's units and the rate and adjustments from that month's bill.
How many units does an air conditioner use?
A 1.5-ton conventional AC draws roughly 1,500 watts. Eight hours a day for 30 days is about 360 units. Inverter models use less.
Is this the official bill?
No. Only your distribution company's bill is official. This is an estimate for budgeting.