Climate Tools & Calculators
Free, practical calculators for understanding your climate impact — size up your carbon footprint, weigh a flight's emissions, compare an EV, cost out your home energy and rooftop solar, and put your carbon in perspective.
Carbon Footprint Calculator
Add up your home energy, driving, flights, and diet to see your annual carbon footprint in kilograms and tonnes of CO2 — plus what it works out to per day and which sources dominate
Flight Emissions Calculator
Estimate the CO2 of any flight from its distance, passengers, and cabin class, with a round-trip option — per passenger and in total — to weigh the climate cost before you book
EV Savings Calculator
Compare a gas car and an electric vehicle over the same yearly miles to see how much you'd save on fuel and how much CO2 you'd avoid, using your own prices and local grid intensity
Home Energy Calculator
Turn your monthly electricity use into annual kilowatt-hours, cost, and CO2 emissions using your utility rate and local grid carbon intensity — your home's yearly energy footprint
Solar Savings Calculator
Estimate a rooftop solar system's annual production, bill savings, simple payback period, and CO2 avoided from its size, your sun hours, electricity rate, and install cost
Carbon Offset Calculator
Translate a quantity of CO2 into tangible terms — the trees needed to absorb it in a year, the cost to offset it at your chosen price, and the equivalent miles of driving