# AC Running Cost Calculator

Source: Searchable (https://searchable.pk/tools/utilities/ac-running-cost-calculator)
Type: Calculator
Rates reviewed: 15 Sept 2026
Retrieved: 15 Sept 2026

How many units an air conditioner adds to your bill and what it costs per month, for inverter and non-inverter 1, 1.5 and 2 ton units.

Version 1.0.0. Inputs: AC type, Hours per day, Days per month, Set temperature, Your all-in rate per unit.

## Worked example (default inputs)

- AC type: 1.5-inverter
- Hours per day: 8 h
- Days per month: 30
- Set temperature: 24
- Your all-in rate per unit: 45 PKR

**Monthly cost of this AC: Rs 9,072**

A 1.5 ton inverter at 24°C uses about 0.84 units per hour, 202 units a month for 8 h/day.

### Usage

- Units per hour: 0.84 kWh
- Units per day: 6.7 kWh
- Units per month: 202 kWh

### Cost

- 202 units × Rs 45: Rs 9,072
- Per day: Rs 302
- Summer season (5 months): Rs 45,360

## How it is calculated

Units per hour = rated power (kW) × duty factor × temperature factor.

- **Rated power** is the compressor's draw at full load (≈1.4 kW for a 1.5 ton inverter; ≈1.8 kW non-inverter).
- **Duty factor** reflects that the compressor does not run flat out once the room is cool, around 60% for inverters (they modulate) and 75% for non-inverters (they cycle on/off).
- **Temperature factor**: each degree below 24°C raises consumption by roughly 6%.

Multiply by hours and days for monthly units, then by your all-in per-unit rate.

## Frequently asked questions

**How many units does a 1.5 ton AC use per hour?**

About 0.8–1.0 units for an inverter at 24°C and 1.3–1.5 units for a non-inverter, rising as you set the temperature lower.

**Is an inverter AC worth it?**

At 8 hours a day, an inverter typically saves 35–45% versus a non-inverter: usually paying back the price difference within two summers.

**Does 26°C really save money?**

Yes: each degree higher saves roughly 6%. 26°C with a fan is the cheapest comfortable setting.

## Sources

- Typical rated power draw from manufacturer datasheets (Gree, Haier, Dawlance, Orient) (Searchable)

How to cite: "AC Running Cost Calculator", Searchable, rates reviewed 15 Sept 2026, https://searchable.pk/tools/utilities/ac-running-cost-calculator