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AC Wattage Calculator
Work out the watts an air conditioner uses from BTU rating, efficiency and running hours, with cost.
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Watts
Compare Your Options And Get Clear Answers
Work out the watts an air conditioner uses from BTU rating, efficiency and running hours, with cost.
AC Wattage Estimator
Enter your numbers below for an instant estimate.
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💡 Tip: Watts = BTU/h / EER.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
AC Quick Guide
Typical values for reference.
| BTU/h | EER | Hours/day | Watts |
|---|---|---|---|
| 5000 | 10 | 8 | 500 W |
| 9000 | 10 | 8 | 900 W |
| 12000 | 10 | 8 | 1,200 W |
| 24000 | 10 | 8 | 2,400 W |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
AC Wattage Calculator FAQ
Answers to common questions about this calculator.
About 1,000-1,200 W at EER 10-12.
Usually not; it cycles to hold the temperature.
Watts = BTU/h / EER.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.