Climate Calculators
Last updated: October 2026
Personal Carbon Footprint Calculator
Estimate your yearly carbon footprint from driving, home electricity, flying and diet, using EPA emission factors, and see which source matters most.
Building Cooling Cost Calculator
Calculate annual air conditioning electricity costs based on building size, SEER rating, and local climate.
Rainwater Harvesting Calculator
Estimate how many gallons of rainwater your roof can collect each year and how much you could save on your water bill.
Tree Carbon Sequestration Calculator
Estimate the CO₂ a grove of trees takes up over a chosen period, based on species, current age and growing conditions.
Rainfall Intensity Calculator
Compute rainfall intensity by dividing total rainfall by the duration in hours.
Heat Index Calculator
Compute the 'feels-like' temperature when high air temperature is combined with humidity, using the National Weather Service Rothfusz regression.
Dew Point Calculator
Calculate the dew point from air temperature and relative humidity with the Magnus formula, in °F or °C, and see how humid the air will feel.
Solar Radiation Calculator
Estimate top-of-atmosphere solar irradiance at solar noon for a given latitude, day of year, and solar declination.
Green Roof Benefits Calculator
Estimate annual energy savings, stormwater retention, and combined financial benefits of installing a green roof.
Green Building Energy Calculator
Calculate the annual energy cost of a building and the savings achieved by green features like insulation upgrades, solar, and high-efficiency systems.
Temperature Converter
Convert temperatures between Fahrenheit, Celsius and Kelvin with the exact formulas.
Wind Chill Calculator
Calculate the wind chill temperature using the NWS/Environment Canada 2001 formula based on air temperature and wind speed.
Emissions Reduction Target Calculator
See how much of an emissions reduction target you have achieved: compare the cut from your baseline year so far with the cut you committed to.
Personal Climate Action Impact Calculator
Quantify the total CO₂ reduction from combining lifestyle changes like diet, transport, energy, consumption, and waste.