Household Sustainability Calculators
Free, practical calculators for the numbers behind a greener home — home energy and appliance costs, household carbon footprint, water use, solar payback, recycling diversion, and the true cost of food waste. Educational tools for planning a lower-impact home, not financial, engineering, or professional advice.
Home Energy Savings Calculator
Turn an appliance's wattage, daily run time, and your electricity rate into its yearly kWh, cost, and carbon, then compare an efficient replacement to see the annual dollars and CO2 you save
Household Carbon Footprint Estimator
Roll driving, home electricity, natural gas, flights, and diet into one annual CO2e figure for your household, broken down by source and set against the national average so you can find your biggest lever
Home Water Usage Calculator
Add up showers, toilet flushes, laundry loads, dishwashing, and outdoor watering to estimate daily and yearly gallons, then model low-flow fixtures and shorter showers to see the water and money saved
Solar Panel Payback Calculator
Enter system cost, incentives, yearly generation, and your power rate to find the simple payback period in years and net lifetime savings across a 25-year panel warranty
Recycling Diversion Rate Calculator
Weigh your recycling, compost, and landfill trash to see the diversion rate you achieve, the pounds kept out of landfill each year, and the gap to a zero-waste goal
Food Waste Cost Calculator
Estimate the dollars and CO2 behind the food your household throws away each year from your weekly grocery spend and wasted share, then set a reduction target and see the savings