🌱 Ecology

🌍Carbon Footprint Calculator Estimate your monthly and annual carbon footprint from electricity, driving and gas use, free online. 📈Carrying Capacity (Logistic Growth) Calculator Project population size over time with logistic growth toward a carrying capacity, free online. ♻️Compost Carbon:Nitrogen Ratio Calculator Mix "brown" carbon-rich and "green" nitrogen-rich materials to reach the ideal 25–30 : 1 compost C:N ratio, free online. 🥗Diet Water Footprint Calculator Estimate the water footprint of your diet, free online. 🌍Earth Overshoot Day Calculator Find the date a population "overspends" the planet's yearly resources, from its ecological footprint in number of Earths, free online. 🔋EV vs Gas Car Calculator Compare yearly running costs and CO₂ emissions of an electric car and a petrol car, free online. 🥕Food Miles Calculator Estimate the CO₂ emitted transporting food by truck, rail, ship or air, free online. ⛽Fuel to CO₂ Emissions Calculator Convert litres of petrol, diesel or LPG, cubic metres of gas, or kilograms of coal to kilograms of CO₂ emitted, free online. 🔌Home Energy Audit (by Appliance) Calculator List your appliances with their power and daily hours to see total energy use, cost and your biggest energy consumers, free online. 🏠Home Energy Savings Calculator Estimate your yearly electricity cost, emissions and savings from cutting usage, free online. ♻️Plastic Footprint Calculator Estimate how much single-use plastic you use in a year, free online. 🐺Predator–Prey (Lotka-Volterra) Calculator Simulate predator and prey populations over time with the Lotka-Volterra model and find the equilibrium, free online. 🌧️Rainwater Runoff Calculator Calculate the rainwater runoff from a surface, free online. ♻️Recycling Savings Calculator Calculate CO2 emissions saved by recycling paper, plastic, glass and aluminum, free online. 🛍️Reusable Bag Savings Calculator Calculate the plastic bags, plastic weight and money you save by using reusable bags, free online. 🦋Shannon Diversity Index Calculator Calculate species diversity and evenness from a list of species counts, free online. 🌿Simpson's Diversity Index Calculator Calculate Simpson's index (D), the Gini-Simpson index (1 − D), the inverse Simpson index and evenness from species counts, free online. 🌾Soil pH Lime Requirement Calculator Estimate how much agricultural lime is needed to raise soil pH to a target for a garden or field, free online. ☀️Solar Panel Payback Calculator Calculate how many years it takes for solar panels to pay for themselves, free online. 🦋Species Richness (Margalef & Menhinick) Calculator Calculate Margalef and Menhinick species richness indices from the number of species and individuals, free online. 🌳Tree Carbon Offset Calculator Calculate how many trees are needed to offset a given amount of CO2 emissions, free online. 🚰Water Footprint of Food & Products Calculator Estimate the hidden water used to produce beef, rice, coffee, cotton and other everyday products, free online. 💧Water Usage Calculator Estimate your weekly and annual household water usage from showers, laundry and dishwashing, free online.