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Both calculators run independently — change the inputs on either side to compare results.

Home Energy Audit Calculator

Estimate how much you could save annually on heating and cooling by upgrading your home's insulation and windows. Useful when planning renovations or evaluating whether energy improvements will pay off.

Home Size (sq ft)

Primary Heating Source

Insulation Quality

Window Efficiency

Electricity Rate ($/kWh)

Fill in the required fields to see your result.

Environment

Air Quality Index Calculator

Estimate the dominant Air Quality Index (AQI) value from PM2.5, PM10, ozone, and NO2 concentrations using a simplified maximum-pollutant formula. Use it for indoor air quality monitoring or rough comparison against EPA outdoor AQI categories.

PM2.5 Concentration (μg/m³)

PM10 Concentration (μg/m³)

Ozone (O₃) Concentration (ppm)

Nitrogen Dioxide (NO₂) (ppm)

Exposure Duration

Fill in the required fields to see your result.

Key differences

	Home Energy Audit Calculator	Air Quality Index Calculator
Category	Environment	Environment
Inputs required	5	5
Result	Estimated Annual Energy Cost ($)	Air Quality Index (AQI) (AQI)
What it does	Estimate how much you could save annually on heating and cooling by upgrading your home's insulation and windows. Useful when planning renovations or evaluating whether energy improvements will pay off.	Estimate the dominant Air Quality Index (AQI) value from PM2.5, PM10, ozone, and NO2 concentrations using a simplified maximum-pollutant formula. Use it for indoor air quality monitoring or rough comparison against EPA outdoor AQI categories.