Ecology & Sustainability

Calculate carbon footprint, solar ROI, EV charging, and energy savings.

• Personal Carbon Footprint Calculator: Yearly CO₂e – Fill in car, flights, diet, electricity and heating to estimate your annual footprint in tonnes of CO₂e.
• EV Charging Calculator: Charging Time and Cost – Enter battery size, charge levels, charger power and kWh price to get charging time, cost and cost per 100 km.
• Food Waste Calculator: Money, Water and CO₂ Lost – Enter what you throw away each week to see the kilos, money, virtual water and CO₂ wasted over a year.
• Inflation Reduction Act (IRA) Energy Tax Credit Estimator – Calculate federal IRS Form 5695 clean energy tax credits for solar, batteries and heat pumps: the 25D and 25C credits ended on January 1, 2026.
• EU Energy Unit Converter & Electricity / Gas Bill Estimator – Convert kWh, MWh, m³ natural gas (GCV), Thermies, and Joules with European energy bill breakdowns (commodity, grid, taxes).
• EU CBAM Calculator: Carbon Border Adjustment Mechanism – Estimate EU CBAM carbon certificate liabilities and border surcharges for industrial imports of steel, aluminum, cement, and fertilizers.
• Website Carbon Footprint & Page Carbon Rating CO2 Estimator – Estimate CO2 emissions per page view based on transfer weight in MB/KB, green hosting energy mix, and tree offset equivalencies.
• Solar Battery Payback Calculator (France): Storage ROI – Is a home battery worth adding to solar panels in France? Estimate the rise in self-consumption, the bill savings and the payback of lithium storage.
• Personal Water Footprint Calculator: Tap and Virtual Water – Evaluate your true daily water footprint combining domestic tap usage and invisible virtual water from diet, meat, and consumer goods.
• Solar Panel Payback Calculator for France: Self-Consumption – Calculate the payback of rooftop solar panels in France: output by region, self-consumption at the regulated rate and surplus sold under the EDF OA feed-in contract.
• Solar Savings Calculator (USA): Panel ROI and Payback – Estimate home solar payback in the United States by state (sun hours, electric rate in $), without the 30% federal 25D credit repealed in 2026, plus 25-year savings.
• Air Conditioner Size Calculator: BTU and Tons by Room – Calculate required cooling capacity in BTU/hr and HVAC tons based on room square footage, ceiling height, sunlight, and occupants.
• Solar Battery Calculator: Inverter, Panels and Off-Grid Days – Size your home battery bank in kWh, peak continuous inverter wattage, and solar panel requirements for complete grid-tie or off-grid backup.
• Heat Pump Savings Calculator: Boiler Replacement ROI – Calculate annual heating savings, return on investment (ROI) net of your subsidies, and CO₂ emissions reduction when switching to a heat pump.
• EV vs Gas Calculator: TCO and Cost per 100 km – Compare an electric car with a petrol or diesel one: cost per 100 km with off-peak, peak or fast charging, yearly savings and total cost of ownership over 3 to 8 years.
• Seeding Rate & Plant Density Calculator (seeds/m², kg/ha) – Work out plant density in seeds/m² and the seeding rate in kg/ha from thousand-grain weight and germination, precision-drill spacing and cover crop mix rates.
• NPK Fertilizer Calculator: Crop Nutrient Balance and Plan – Calculate balanced Nitrogen (N), Phosphorus (P₂O₅), and Potassium (K₂O) fertilizer requirements, factoring in soil mineral reserves and manure/slurry credits.
• Sprayer Calibration Calculator: ISO Nozzle Flow Rate – Determine nozzle flow rate (L/min), optimal operating pressure, ISO nozzle color, and beaker calibration collection time.
• Crop Water Requirement Calculator: ETc and Irrigation – Calculate crop evapotranspiration (ETc = ETP × Kc), soil readily available water (RAW), irrigation scheduling, and pumping volumes.
• Cattle Ration Calculator: Dry Matter, UFL Energy and PDI – Determine daily feed requirements in Dry Matter (DM), Net Energy (UFL), and Digestible Protein (PDI) using the INRAE feed unit system.
• Silage Tonnage Calculator: Bunker Silos and Hay Bales – Calculate bunker silo volume, round/square bale tonnage in Dry Matter (DM), and estimate livestock feeding autonomy.
• Lime Requirement Calculator: Soil pH and Neutralizing Value – Calculate required Neutralizing Value (NV) and commercial liming materials (Lime, CaCO3) to correct soil acidity and optimize cation exchange.
• Orchard & Vineyard Planting Density & Trellising Calculator – Calculate plants per hectare, total rootstocks required, row linear meters, and trellising wire lengths for vineyards and fruit orchards.
• Manure Storage Calculator: Slurry Pit and Manure Pad Sizing – Size slurry pits (m³) and solid manure pads (m²) based on herd inventory, winter storage requirements, and calculate total NPK organic value.
• Tractor Fuel Consumption (GNR) & Field Work Cost Calculator – How much diesel does a tractor use per hectare and per hour? Indicative figures for ploughing, tillage and drilling, plus the field work cost per hectare.
• Business Travel vs Video Call Carbon Footprint Calculator – Compare CO2e greenhouse emissions and travel budgets between in-person meetings (Train, Plane, Car) and video conferencing.
• EV charging stations France: power and plug types near you – EV charging points around a French address: power in kW, plug type, access, free or paid and distance, from the national IRVE register (no live status).
• Groundwater level in France: nearest monitoring well – Latest level from the monitoring well nearest to a French address and how it ranks against the same dates in past years, with the method explained.
• Live river level in France: water height and flow by station – Water height and flow measured in real time by the gauging station nearest to a French address, with a 48-hour curve and the 24-hour change.
• Tap water quality in France by town: nitrates, hardness – Latest official tap water tests for any French municipality: compliance, nitrates, pesticides, E. coli, pH and hardness, from regional health agencies.
• Livestock unit calculator: LSU/ha stocking rate (France, EU) – Work out a herd's livestock units (cattle, sheep, goats, horses) and its stocking rate in LSU/ha with France's CAP grid or the EU Eurostat grid.
• cmol/kg to kg/ha calculator: meq/100 g, ppm, lb/ac (K, Mg) – Convert soil test results between meq/100 g, cmol(+)/kg, ppm, kg/ha and lb/ac for K, Ca, Mg and Na, as element or oxide, for your depth and bulk density.
• Animal Gestation Calculator: Cow, Dog, Horse, Pig Due Date – Due date from the breeding date for cows, ewes, goats, sows, mares, jennies, dogs and cats, with the usual range and sourced gestation lengths.
• Bushels to tonnes calculator: wheat, corn, soybeans – Convert bushels to metric tonnes and bu/acre to t/ha for wheat, corn, soybeans, barley or oats, using the USDA standard bushel weights.
• Grain moisture shrink calculator: corn, soybeans, wheat – Work out grain shrink from drying (1,000 kg at 18% moisture leaves 953.5 kg at 14%), with handling loss and a shrink table point by point.
• Grain bag capacity calculator: tonnes per silo bag – Estimate how many tonnes of soybeans, corn, wheat or sunflower fit in a 6 to 12 ft grain bag of 60 or 75 m, per metre and per bag.
• Average daily gain calculator: ADG for cattle, pigs, sheep – Work out average daily gain in g/day from two dated weighings, the gain of a batch and the date a steer, pig or lamb will reach its target weight.
• Cattle water requirement calculator: litres per day – How much water does a cow drink a day? Litres per animal by milk yield, cattle type and temperature, then herd needs per day, month and year (OMAFRA, NRC).
• Energy corrected milk calculator: ECM, FPCM and 4% FCM – Convert milk yield to energy-corrected milk (ECM, Sjaunja), IDF fat- and protein-corrected milk (FPCM) and 4% fat-corrected milk from fat and protein.
• Feed conversion ratio calculator (FCR) and feed cost per kg – Calculate the feed conversion ratio of pigs, broilers or cattle, the feed efficiency and the feed cost per kg of weight gain, with an editable feed price.
• Companion planting chart: good and bad vegetable pairs – Grid of good and bad pairings between 20 vegetables, filterable, with the source of every relationship and a clear flag on what is only garden tradition.
• Compost C/N ratio calculator: mix, moisture and balance – C/N ratio and moisture of your compost mix weighted by dry matter, a sourced table of 18 materials and the amount to add to reach a C/N of 30.
• Egg incubation calendar: candling, lockdown and hatch day – Candling, lockdown and hatch dates for chicken, duck, quail, goose, turkey and guinea fowl eggs, with temperature and humidity, exportable to your calendar.