Reviewed 26 May 2026. AC wattage is a planning estimate. Actual units vary by room size, thermostat, compressor load, insulation, maintenance, and outdoor temperature.
Estimate Your AC Usage
Common bedroom/lounge estimate
Use your bill average if you know it. Actual bill can include taxes, FCA, QTA, fixed charges, and provider-specific treatment.
Estimated AC usage312 units/month
Units per hour1.30
Units per day10.4
Monthly costRs 17,160
Solar impact2.6kW
The solar impact number means this AC usage alone may require roughly 2.6kW of solar generation capacity under Bijli Hisab's Pakistan-average monthly generation assumption.
Add full home usageAC Units Formula
The simple formula is: watts x quantity x hours per day x days per month divided by 1000. For example, one 1.5 ton inverter AC using 1300 watts for 8 hours a day over 30 days is about 312 units per month.
Common AC Consumption Estimates
AC typeAverage wattsUnits/hourUnits/month at 8h/day
Inverter AC 1 ton900W0.90 units216 units
Inverter AC 1.5 ton1300W1.30 units312 units
Inverter AC 2 ton1800W1.80 units432 units
Non-inverter AC 1 ton1250W1.25 units300 units
Non-inverter AC 1.5 ton1800W1.80 units432 units
Non-inverter AC 2 ton2400W2.40 units576 units
How To Reduce AC Bill
Use realistic temperature settings instead of overcooling.
Clean filters and service the outdoor unit before summer peak.
Improve curtains, sealing, and room insulation where possible.
Estimate total household units before buying solar only for AC.
Sources and Assumptions
AC wattage varies by brand, compressor behavior, thermostat, room heat gain, and maintenance. This page uses editable planning presets. Electricity tariff assumptions should be checked against your actual bill and current NEPRA/government tariff notifications.
- Electricity tariff reference: NEPRA tariff determinations
- Solar resource reference: Global Solar Atlas
- Use the watt rating on your AC label or manufacturer sheet for a better estimate when available.