Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Environment
Carbon Footprint Calculator
Estimate annual household CO2 emissions from electricity, natural gas, driving, and air travel using EPA-derived emission factors. Use it to find the biggest contributors to your personal footprint and prioritize reduction actions.
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
| Carbon Footprint Calculator | Solar Panel Savings Calculator | |
|---|---|---|
| Category | Environment | Environment |
| Inputs required | 5 | 4 |
| Result | Annual CO2 Emissions (lbs CO2) | Payback Period (years) |
| What it does | Estimate annual household CO2 emissions from electricity, natural gas, driving, and air travel using EPA-derived emission factors. Use it to find the biggest contributors to your personal footprint and prioritize reduction actions. | 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. |