Module 04
What's Your Actual Energy Cost?
Your utility bill mixes a fixed service charge with a per-unit energy rate, plus taxes and riders. Enter a few bills and we'll work out your true cost per GJ — the number that actually determines how much an efficiency upgrade saves you.
Enter the total amount and m³ used from 2–3 recent bills (more spread between low and high months gives a better split).
Usage (m³)Total bill ($)
Enter at least one bill to see your effective cost.