Six simulators, one for each part of daily life: carbon, water, energy, trash, getting around, and food. Each one starts with a typical home, lets you change what you actually do, and shows the result instantly with real numbers from the EPA, the state of California, and other public sources.
Paste the share links from any of the six simulators (one per line, in any order). Each tool is scored against a typical home: 50 points means you match it, 100 means you use half as much, and 0 means twice as much. Your overall score is the average of the tools you’ve done.
The interaction pattern is inspired by En-ROADS, the global climate simulator created by Climate Interactive and MIT Sloan. These are independent household-scale models built for wann.org and are not affiliated with them or with any utility, city, or agency. Every simulator has a “How the model works & sources” panel at the bottom that lists each number and where it came from. Defaults are typical for Santa Monica, California; use each tool’s region picker for somewhere else.
The Sustainability Lab is a free set of six household sustainability calculators from the Accessible Sustainability Alliance: carbon, water, home energy and solar, waste, transportation, and food and diet. Each one uses sliders and live charts, starts with Santa Monica, California defaults and lets you pick your own region. Together they give you a combined Household Sustainability Score.
Using the Lab in class? Our free Household Sustainability Lesson Plan for Grades 7–12 (Free) walks students through the calculators step by step, with a worksheet, discussion questions and standards alignment.
Each calculator lists its own sources, including EPA eGRID, the EPA GHG Emission Factors Hub, EIA RECS 2020, NREL PVWatts, EPA WaterSense, CalRecycle, ReFED and Our World in Data. The calculators are written at about an 8th-grade reading level so students, families and teachers can use them together. See our full methods and sources.
Key sources:
Students, families and educators. They are written in plain language at about an 8th-grade reading level and are free to use in classrooms.
No. All calculators run in your browser with no sign-up.
The Accessible Sustainability Alliance is based in the Santa Monica area. Every calculator has a region picker so you can switch to your location.
Yes. They work well for units on climate, energy, water and waste. Contact us at contact@wann.org for classroom ideas.
Built and reviewed by the Accessible Sustainability Alliance, a 501(c)(3) nonprofit operated by the Wann Heritage Foundation. Last updated October 5, 2026. Results are estimates for education and planning. Questions or corrections: contact@wann.org.