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Free environmental calculators for solar position, day length, carbon footprint, and sustainability. Make eco-friendly decisions with data.
Calculate sunrise and sunset times for any location
See daylight hours and how the day lengthens or shortens
Find the sun's elevation and azimuth for any moment
Calculate how hot it really feels
Calculate how cold it really feels
Find the dew point and how muggy air feels
Find wet-bulb temperature and heat survivability risk
Find relative humidity from dew point or wet bulb
Calculate Wet Bulb Globe Temperature for heat safety
Air density from temperature, pressure & humidity, plus density altitude
Calculate roof snow loads based on depth or ASCE 7 standards
Calculate water evaporation rate from swimming pools
Estimate safe sun exposure time from UV index and skin type
Calculate solar system size, cost, and savings for your home
Estimate your annual CO₂e from transport, home, flights, diet and shopping
Calculate offset cost per ton of CO₂ and trees needed
Estimate per-passenger CO₂ for any flight
Calculate energy and cost savings from efficiency upgrades
Calculate how many Earths we'd need if everyone lived like you
Calculate your total water usage including hidden virtual water
Estimate your gas or diesel car's tailpipe CO₂ from its MPG
Calculate your personal plastic waste generation and get reduction tips
Convert CO₂ emissions into relatable everyday equivalencies
Calculate how much CO₂ trees absorb and offset
Compare your EV's grid CO₂ vs a gas car and find break-even
Calculate your carbon tax liability from emissions
Calculate your diet's climate impact
Calculate your company's CO2 emissions
Calculate embodied carbon (kgCO2e) for building materials
Assess your location's climate risk exposure using IPCC methodology
Calculate R-value upgrades, energy savings, and payback period
Compare CO₂ emissions between meat and plant-based diets
Emissions you avoid by composting vs landfill
Carbon footprint of your home appliances, by grid region
Household waste carbon footprint by stream
Calculate urban heat island intensity and impact
Make informed decisions about your environmental impact with our climate calculators. From carbon footprint tracking to energy efficiency calculations, these tools help you understand and reduce your ecological footprint.
Measure your carbon footprint and understand how your daily choices affect the environment.
Discover opportunities to reduce energy costs while helping the planet.
Compare the environmental impact of different options before making decisions.
Establish realistic sustainability targets based on accurate calculations.
Learn about environmental metrics and what they mean for our planet.
Everyone deserves access to environmental awareness tools at no cost.
Choose the calculator that matches your environmental question.
Enter relevant data about your consumption, travel, or energy use.
View your results with comparisons to averages and benchmarks.
Explore recommendations for reducing your environmental impact.
Track your progress over time by saving or noting your results.
Calculate your household's carbon emissions from energy, travel, and consumption.
Measure corporate environmental impact for ESG reporting and improvement.
Evaluate energy-saving upgrades like solar panels, insulation, or efficient appliances.
Compare the environmental cost of different transportation options.
Our calculators use industry-standard emission factors and methodologies. While no calculation is perfect due to varying data sources, they provide reliable estimates for comparison and goal-setting.