🌱 Ecology calculators

Carbon footprint, energy use and environment. 20 calculators.

• Bike vs Car Commute Savings CalculatorCalculate the money, CO₂ and calories saved by cycling instead of driving to work.
• Car Carbon Footprint CalculatorEstimate CO₂ emissions from driving based on distance, fuel consumption and fuel type.
• Carbon Offset Cost CalculatorCalculate the cost of offsetting your emissions at a given carbon price per tonne.
• Compost C:N Ratio CalculatorCalculate the carbon-to-nitrogen ratio of a mix of two compost materials — greens and browns.
• Electricity CO₂ Emissions CalculatorCalculate the carbon emissions from your electricity use with your grid's emission factor.
• EV vs Petrol Car Running Cost CalculatorCompare the energy cost per km and per year of an electric car against a petrol or diesel car.
• Flight Carbon Emissions CalculatorEstimate CO₂ emissions per passenger for a flight from distance, cabin class and non-CO₂ effects.
• Garden Watering CalculatorCalculate how much water a lawn or garden needs per week and how long to run a sprinkler or hose.
• LED Bulb Savings CalculatorCalculate energy, money and CO₂ saved by replacing old bulbs with LEDs.
• Mark–Recapture Population Estimator (Lincoln–Petersen)Estimate an animal population size from mark and recapture counts using the Lincoln–Petersen and Chapman methods.
• Pond Liner Size & Volume CalculatorCalculate the pond liner size you need and the pond's water volume from length, width and depth.
• Population Density CalculatorCalculate population density (individuals per km², hectare or square mile) from count and area.
• Rainwater Harvesting CalculatorCalculate how much rainwater you can collect from a roof based on area, rainfall and runoff coefficient.
• Shower Water & Energy CalculatorCalculate how much water and energy your showers use — and what a low-flow head or shorter shower saves.
• Solar Battery Storage Size CalculatorCalculate the battery capacity needed for backup or off-grid solar from daily load, autonomy days and depth of discharge.
• Solar Panel Output CalculatorEstimate daily, monthly and yearly energy from a solar PV system based on size, sun hours and system losses.
• Solar System Size CalculatorWork out the solar PV system size (kWp) and number of panels needed to cover your electricity use.
• Trees to Offset CO₂ CalculatorEstimate how many trees it would take to absorb a given amount of CO₂ per year.
• Water Leak (Dripping Tap) CalculatorEstimate how much water a dripping tap or leak wastes per day and per year.
• Wind Turbine Power CalculatorCalculate wind turbine power from rotor diameter, wind speed, air density and power coefficient.