Sustainability Calculators
37 free calculatorsEvery household energy and water decision has a number behind it. These calculators make those numbers visible - from solar payback periods to rainwater collection potential to the real cost of running your appliances.
Each tool shows the formula and assumptions so you can adapt the result to your specific situation.
Appliance Energy Calculator
Calculate appliance energy usage and cost. Enter power rating and usage hours to see daily, monthly, yearly consumption and electricity costs.
Appliance Energy Cost Calculator
Calculate monthly and yearly electricity costs for any appliance. Enter power usage, hours of operation, and electricity rate to estimate energy expenses.
Battery Backup Calculator
Calculate how long your battery will power your devices. Enter battery capacity, device power consumption, and get backup time estimates.
Battery Storage Calculator
Calculate how long your battery will power your devices. Enter battery capacity and device power consumption to see runtime in hours and energy costs.
Carbon Footprint Calculator
Calculate your annual carbon footprint from transportation, energy use, and lifestyle. Get personalized CO2 emission estimates and reduction tips.
Carbon Offset Calculator
Calculate the cost and number of trees needed to offset your carbon footprint from flights, driving, and energy use. Enter emissions and see offset options.
Composting Calculator
Calculate ideal brown to green material ratios for composting. Enter material weights to get carbon to nitrogen ratios and decomposition timeline.
Composting Impact Calculator
Calculate how much CO2 you save by composting organic waste. Enter weekly food waste and see annual carbon reduction, methane prevention, and environmental i...
Electric Bike Savings Calculator
Calculate how much money you save by switching to an electric bike for daily commuting. Compare fuel, parking, and maintenance costs vs e-bike costs.
Electric Vehicle Savings Calculator
Compare electric vs gas car costs over time. Enter vehicle prices, fuel costs, and driving habits - see total 5-year savings from switching to electric.
EV Charging Cost Calculator
Calculate electric vehicle charging costs with our free EV charging cost calculator. Find home and public charging expenses instantly.
EV vs Gas Cost Calculator
Compare the cost of driving an electric vehicle vs gas car. Enter your annual mileage, fuel efficiency, and local prices to see which option saves money.
Flight Emissions Calculator
Calculate CO2 emissions from flights. Enter departure and arrival cities, passenger count, and class - see carbon footprint in kg CO2, trees needed to offset.
Food Waste Calculator
Calculate your annual food waste cost and environmental impact. Enter weekly household spend and waste percentage to see money lost and CO2 emissions per year.
Generator vs Solar Cost Comparison Calculator
Compare generator vs solar panel costs over time. Calculate fuel costs, maintenance, and payback period to find the most economical power solution for your n...
Green Roof Benefit Calculator
Calculate stormwater, energy, and air quality benefits from your green roof installation. Enter roof size and location to see annual savings.
Heat Pump Savings Calculator
Calculate annual savings from switching to a heat pump. Compare energy costs, efficiency ratings, and heating hours to find potential yearly savings from you...
Home Energy Audit Calculator
Calculate your home's annual energy usage and costs. Enter home size, insulation quality, heating system, and local rates to see total energy consumption and...
Insulation Savings Calculator
Calculate how much money you'll save by adding insulation to your home. Enter current R-value, new R-value, heating cost, and cooling cost to see annual savi...
Meat Consumption Emissions Calculator
Calculate your food's carbon footprint by meat type and weekly consumption. See CO2 emissions per meal and annual environmental impact instantly.
Net Zero Calculator
Calculate your net emissions to see if you've achieved net zero. Enter annual emissions and carbon offsets — get your net carbon footprint and climate impact...
Paper Reduction Calculator
Calculate environmental impact of reducing paper usage. Enter weekly pages and reduction percentage to see trees saved, water conserved, and CO2 reduced annu...
Phantom Load Calculator
Calculate how much standby power your electronics waste and what it costs you yearly. Enter device watts and hours plugged in to see phantom load impact.
Plastic Reduction Calculator
Calculate your plastic waste reduction by switching to reusable alternatives. Enter weekly usage and see annual plastic savings in pounds and environmental i...
Rainwater Harvesting Calculator
Calculate annual rainwater collection potential from your roof. Enter roof area, rainfall data, and efficiency to estimate gallons harvested per year.
Recycling Impact Calculator
See the environmental impact of your recycling habits. Enter material type and weight to see CO2 saved, energy conserved, and landfill waste diverted.
Renewable Energy Roi Calculator
Calculate ROI for solar panels, wind turbines, and other renewable energy systems. Enter installation cost and annual savings to see payback time and 20-year...
Solar Panel ROI Calculator
Calculate solar panel return on investment. Enter system cost, monthly savings, and incentives to see payback period and lifetime ROI percentage.
Solar Panel Savings Calculator
Calculate your solar panel savings over time. Enter system cost, electricity rate, and solar output to see monthly savings and payback period.
Solar ROI Calculator
Calculate solar panel return on investment with our free calculator. Get payback period, total savings, and ROI percentage for your solar system.
Solar System Size Calculator
Calculate scaled distances and sizes for solar system models. Enter your scale and get proportional distances between planets and the sun for accurate educat...
Solar Water Heater Calculator
Calculate solar water heater sizing and savings. Enter your household size, daily hot water usage, and location. See collector area needed and annual cost sa...
Tree Planting Offset Calculator
Calculate how many trees to plant to offset your carbon footprint. Enter your annual CO2 emissions and tree type to see offset timeline and planting requirem...
Water Footprint Calculator
Calculate your daily water footprint from food, drinks, and products. Enter your consumption and see how much water you use including hidden water in manufac...
Water Heating Cost Calculator
Calculate the cost to heat water for any purpose. Enter water volume, temperature rise, and energy price to see heating cost per use and annual expenses.
Water Usage Calculator
Calculate your daily, monthly, and yearly water consumption based on household activities. Track usage patterns and identify water-saving opportunities.
Wind Turbine Output Calculator
Calculate wind turbine power output based on wind speed, rotor diameter, and efficiency. Get hourly and yearly energy production estimates for renewable ener...