Home Energy Audit Savings Calculator
Estimate the money and CO₂ you could save each year by cutting home energy waste after an audit.
How it works
Money saved = annual bill × saving% · CO₂ saved = annual kWh × saving% × grid factor
A home energy audit finds where energy leaks — draughty gaps, thin insulation, inefficient heating and appliances — and estimates how much each fix would save. The dollar saving is simply your bill times the percentage you trim, and it compounds year after year. Because most home energy still comes from fossil fuels or a mixed grid, the same efficiency gain also cuts CO₂ in proportion.
Worked example
On a $2,400 annual bill, a 15% saving is $360 a year, or $3,600 over a decade. If your home uses 10,000 kWh on a 0.4 kg/kWh grid, that 15% cut also avoids 10,000 × 0.15 × 0.4 = 600 kg of CO₂ a year.
Frequently asked questions
How much can an audit realistically save?
Typical whole-home improvements — air sealing, added insulation, efficient heating and lighting — cut energy use by 10–30%. The exact figure depends on how leaky and outdated the home was to begin with.
Do the savings really last?
Insulation and sealing keep working for decades, so the savings recur every year. That is why the ten-year figure matters: the upfront cost is one-time, the savings are ongoing.
Is a professional audit worth it?
A professional audit uses tools like blower-door tests and infrared cameras to find hidden losses a walkthrough misses, and often pinpoints the cheapest high-impact fixes first.
Related calculators
Rough estimate for comparison — actual savings depend on your home, climate and the specific measures installed.