Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
Fill in the required fields to see your result.
Environment
Solar Panel Savings Calculator
Estimate the payback period of a residential solar PV system based on system size, cost, local sun hours, and electricity rate. Use it to evaluate whether solar investment makes financial sense for your specific location and utility rates.
Fill in the required fields to see your result.
Key differences
| Air Quality Index Calculator | Solar Panel Savings Calculator | |
|---|---|---|
| Category | Environment | Environment |
| Inputs required | 5 | 4 |
| Result | Air Quality Index (AQI) (AQI) | Payback Period (years) |
| What it does | 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. | Estimate the payback period of a residential solar PV system based on system size, cost, local sun hours, and electricity rate. Use it to evaluate whether solar investment makes financial sense for your specific location and utility rates. |