Question 1

How much is the bill if I run AC 8 hours a day?

Accepted Answer

A 13평 inverter unit running 8 h × 22 days adds roughly 230–260 kWh. For a household already at 200 kWh, summer-relief tiers push the bill up by 80,000–110,000 KRW. Enter your area and base kWh for an exact figure.

Question 2

Do inverter aircons really save?

Accepted Answer

Inverter wins when daily use exceeds ~6 hours. After 30 minutes at full draw it ramps down to 30–50% partial load, averaging 30–40% less than constant-speed units. For 2–3 hours a day the gap is negligible.

Question 3

Is leaving the AC on 24/7 really cheaper?

Accepted Answer

In a well-insulated apartment with an inverter unit, 24/7 operation matches or beats on-off cycles every 6 hours. But total kWh climbs into the next progressive tier — check your base kWh field in this tool first.

Question 4

How are progressive tiers calculated?

Accepted Answer

Korean residential low-voltage uses 200 / 400 kWh boundaries with marginal prices of 120 / 214.6 / 307.3 KRW per kWh. In July–August boundaries relax to 300 / 450 kWh. The tool auto-applies summer relief.

Question 5

How do I compute models not in the list?

Accepted Answer

Pick the area tier (6/9/13/18/25평) — the tool uses Korea Energy Agency averages as fallback. If you know the rated kW from the spec sticker, switch to manual input.

Question 6

Are my inputs stored on a server?

Accepted Answer

No. Inputs stay only in your browser localStorage and never leave your device. Share URLs (?s=...) embed the values in base64, only visible if someone opens that specific link.

Question 7

How is the large-family discount applied?

Accepted Answer

Households of 4+ and birth-bonus households receive a 30% discount capped at 16,000 KRW/month. Selecting the option auto-applies this cap to the estimated bill.

Korea Aircon Electricity Cost

1. Aircon spec

2. Usage

3. Base usage · household

4. Progressive tier (month 7)

5. Share with friends