60 environment calculators that get the numbers right.
Carbon footprints, solar and clean energy, farming, water and recycling. No signup, no paywalls.
Browse · 5 topics
Carbon & Air 15 calculators
Carbon & Air overview
- AI Carbon Footprint CalculatorEnergy and carbon behind your AI use
- Air Purifier Room Size CalculatorAir purifier CADR for your room
- AQI Health Impact CalculatorAir quality as cigarettes smoked
- Business GHG Emissions CalculatorYour business's Scope 1, 2 and 3 emissions
- Carbon Footprint CalculatorYour yearly carbon footprint
- Carbon Offset CalculatorTrees and cost to offset your carbon
- Deforestation Impact CalculatorCarbon and value lost to deforestation
- E-Bike Commute Savings CalculatorMoney and CO2 saved with an e-bike
- Eco Driving Fuel Savings CalculatorFuel saved by driving smarter
- Ecological Footprint CalculatorYour footprint in global hectares
- Flight Carbon CalculatorCO2 from a flight
- Surface Albedo CalculatorHow much sunlight a surface reflects
- Sustainability Score CalculatorScore your lifestyle from 0 to 100
- Tree Benefits CalculatorWhat one tree does for you each year
- Tree Planting Carbon CalculatorTrees needed to offset your footprint
Solar & Clean Energy 18 calculators
- Appliance Energy CalculatorWhat an appliance costs to run
- Biogas Yield CalculatorBiogas yield from organic waste
- EV Charging Cost CalculatorEV charging cost vs. gas
- Geothermal Heat Pump COP CalculatorGeothermal heat pump efficiency
- Green Building Cost CalculatorGreen building cost and payback
- Heat Pump Savings CalculatorHeat pump savings vs. gas or oil
- Heat Pump Water Heater ROI CalculatorDoes a heat pump water heater pay off?
- Home Battery Backup CalculatorHow long a home battery lasts
- Home Energy Audit CalculatorEnergy costs and the best home upgrades
- Hydroelectric Power CalculatorPower from water flow and head
- Renewable Energy Payback CalculatorPayback and ROI on renewables
- Solar Battery Storage CalculatorSolar battery savings and backup
- Solar Panel Savings CalculatorSolar savings, size and payback
- Solar Panel Wattage CalculatorPanel wattage from size and efficiency
- Solar ROI Detailed CalculatorSolar ROI with NPV and IRR
- Wave Energy CalculatorPower in ocean waves
- Wind Energy CalculatorWind turbine output and payback
- Wind Turbine Power Output CalculatorTurbine power from wind speed
Farming & Garden 13 calculators
- Chicken Coop Size CalculatorCoop and run size for your flock
- Corn Yield Estimate CalculatorCorn yield in bushels per acre
- Evapotranspiration CalculatorCrop water loss for irrigation
- Fertilizer Rate CalculatorHow much fertilizer to apply
- Greenhouse Heating CalculatorHeat needed for a greenhouse
- Growing Degree Days CalculatorGrowing degree days for crops
- Hay Bale Count CalculatorHay bales to feed your herd
- Livestock Stocking Rate CalculatorHow many animals your pasture can hold
- Plant Spacing CalculatorHow many plants fit in your bed
- Raised Bed Soil CalculatorSoil to fill a raised bed
- Seeding Rate CalculatorPounds of seed per acre
- Tree Age CalculatorEstimate a tree's age from its trunk
- Tree Height CalculatorMeasure a tree's height from the ground
Water & Food 6 calculators
- Food Miles Carbon CalculatorCarbon from how far food travels
- Food Waste Cost CalculatorWhat wasted food costs you
- Rainwater Collection CalculatorRainwater you can collect from a roof
- Stream Flow Discharge CalculatorStream flow from area and velocity
- Water Conservation CalculatorWhere your household water goes
- Water Usage CalculatorYour daily water use
Recycling & Ecology 8 calculators
Recycling & Ecology overview
- Biodiversity Impact CalculatorYour biodiversity footprint
- Circular Economy Impact CalculatorImpact of recycling six materials
- Compost Savings CalculatorWhat composting saves
- Lotka-Volterra Predator-Prey CalculatorSimulate predator and prey populations
- Plastic Footprint CalculatorYour yearly plastic footprint
- Recycling Savings CalculatorMoney and resources saved recycling
- Shannon Diversity Index CalculatorShannon diversity from species counts
- Simpson Diversity Index CalculatorSimpson diversity from species counts