Electricity Cost Calculator

Enter appliance wattage and usage time to estimate your electricity bill. Calculate power consumption and monthly costs with this free online electricity cost calculator.

Check your KEPCO bill or KEPCO ON app

Frequently Asked Questions

What is a tiered electricity rate?
Tiered pricing means the per-unit cost of electricity increases as your usage rises. Higher consumption tiers are charged at progressively higher rates.
How do I find an appliance's wattage?
Check the label on the back or bottom of the appliance, or refer to the product manual for the rated power consumption in watts (W) or kilowatts (kW).
Does standby power affect my electricity bill?
Yes. Standby power is consumed even when a device is off or in sleep mode, typically 0.5-10W. Over time, this phantom load can add significantly to your bill.
Updated 2026 pricing