How much electricity does a 1.5 ton AC use?

A 1.5 ton AC is equal to 18,000 BTUs. Depending on its SEER rating, it typically draws between 1,200 to 1,800 watts (1.2 - 1.8 kWh) per hour while the compressor is running.

How much does AC cost per month?

It varies widely, but running a standard AC for 8 hours a day at 15 cents per kWh typically costs between $40 to $80 per month.

AC Electricity Cost Calculator

Wondering how much electricity your AC is using? Enter your AC's BTU rating (or tonnage), efficiency (SEER), and daily usage to get a precise breakdown of your cooling costs.

Appliance Settings

Power Output

Unit

Efficiency Rating (SEER/EER)Typical SEER ranges from 13 to 22+

Hours per Day

Electricity Rate ($/kWh)

Room Size (sq ft) - OptionalJust for reference. A standard rule is ~20 BTU per sq ft.

Power Estimate: Your device uses approximately 857 Watts (0.86 kW) when running.

Running Costs

Estimated Monthly Cost

$31.27

208 kWh consumed per month

Hourly Cost

$0.13

Daily Cost

$1.03

Solar Offset Needed

~ 4 Panels

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*Assuming 400W solar panels producing ~60kWh/month each.

💡 How to use this calculator

Select your device: Choose whether you want to calculate costs for an Air Conditioner or a Space Heater.
Enter the power: Input your device's power rating. For ACs, this is typically in BTUs (e.g., 12,000 BTU for a 1-ton AC). For heaters, it is usually in Watts (e.g., 1500W).
Set the usage: Estimate how many hours per day the appliance runs.
Update your rate: Check your latest utility bill for your exact cost per kWh, or leave the default average rate.
View your results: The calculator instantly updates to show your estimated hourly, daily, and monthly costs!