Air Conditioner Heating Cost & CO2
Estimate the electricity cost and CO2 emissions of running your AC in heating mode, broken down per hour, day, and month.
Last updated:
Input
W
Power draw (W) listed on the unit's spec sheet or remote guide
h
days
/kWh
Enter your own rate per kWh from your utility bill
kg-CO2/kWh
A common value is about 0.45 kg-CO2/kWh
Result
Estimated cost per month
$4,464.00
Cost per day
$148.80
Cost per month
$4,464.00
Energy per month
144 kWh
CO2 per month
64.8 kg
| Period | Energy (kWh) | Cost | CO2 (kg) |
|---|---|---|---|
| 1 hour | 0.6 | $18.60 | 0.27 |
| 1 day | 4.8 | $148.80 | 2.16 |
| 1 month | 144 | $4,464.00 | 64.8 |
How it works
- Cost is calculated as power (W) ÷ 1000 × hours (h) × electricity rate per kWh. CO2 is the same energy (kWh) multiplied by the CO2 emission factor (kg-CO2/kWh).
- Electricity rates and CO2 factors vary widely by country, region, and contract. The defaults are rough placeholders, so enter the unit price from your own utility bill for a more accurate estimate.
- The CO2 emission factor depends on your country's and provider's power mix. Replace the default with your supplier's factor if you know it.
- Enter the heating-mode power draw (W) from the unit's spec sheet or catalog. Inverter models vary a lot with outdoor temperature and target setting, so results are only estimates.
- Displayed amounts and emissions are rounded, so period totals may not add up exactly. These figures do not guarantee your actual bill or emissions.
Frequently asked questions
- How are the heating cost and CO2 calculated?
- Cost uses power (W) ÷ 1000 × hours × unit price (yen/kWh), and CO2 multiplies the same energy (kWh) by a CO2 emission factor (kg-CO2/kWh). Results are shown per hour, per day, and per month.
- What CO2 emission factor is used, and can I change it?
- The default is 0.45 kg-CO2/kWh, a representative utility-average value (roughly the 0.43–0.47 range). If you know your provider's factor, you can enter it in the input field.
- Why don't the rounded amounts add up exactly across periods?
- Amounts and emissions are rounded for display, so the hourly, daily, and monthly totals may not match to the last digit. Inverter units also vary a lot with outdoor temperature and setpoint, so the result is only an estimate.
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Air Conditioner Heating Cost & CO2