Answer a few questions. Decarb calculates your estimated footprint across eight emission categories and delivers a PDF report with your highest-impact reduction actions — ranked by verified emission factors from the IPCC, IEA, and EPA. Not guesswork. Not generic advice.
From people who have used Decarb
“It was interesting to see where I stand and what would have the biggest impact. Some actions that I was not expecting.”
“I had no idea my investments were my biggest category. That alone changed how I think about my impact.”
“I loved the ranked action plan! Not just a number but actual recommendations to reduce your carbon footprint.”
The average personal footprint is 7–12 tons CO₂e per year. Without accurate measurement, effort concentrates on low-impact actions while the highest-impact sources go unaddressed. Decarb gives you the data to focus where it counts.
Answer a few questions about your energy use, transport, diet, and purchases. We apply verified emission factors to calculate your total estimated footprint in tons CO₂e.
Your report shows estimated emissions by category, ranked by impact. No generic advice — only what is relevant to your specific profile and lifestyle.
A structured action plan with prioritised steps, ranked by tons CO₂e saved. Focus on what moves the number most — not what feels good.
Every Decarb calculation produces a structured PDF report — not a score, not a grade. A data-driven breakdown you can act on.
Broken down across eight categories: flights, transport, energy, food, waste, goods, and financed emissions.
Your result compared against national and global averages, and the 1.5°C pathway target.
Every action is quantified in tons CO₂e saved. The highest-impact changes appear first.
Every emission factor and assumption documented. Transparent by default.
Our calculations use emission factors from the IPCC, IEA, and national greenhouse gas inventories. We distinguish estimates from verified data, and we document every assumption we make.
We will not tell you you are carbon neutral. We will tell you where you stand — and what to do about it.
“Precision without transparency is not credibility. We show our work.”
Primary source for global warming potential values and emission factors.
Electricity grid emission factors by country and energy mix data.
Country-level emission factors for transport, food, and consumption.
Consumption-based emission factors for goods and services.
Decarb gives access to certified offset projects verified by UNFCCC CERs and Verra VCS standards. Offsetting complements reduction — it does not replace it.
Four standalone calculators for the decisions that move your footprint most. Each uses the same verified emission factors as the full Decarb calculator.
Estimate tons CO₂e and fuel costs saved by switching to an EV. Uses your US state’s grid factor from eGRID 2023.
Try calculator →Count your short, medium, and long-haul flights to estimate your annual aviation footprint. Includes radiative forcing.
Try calculator →Enter any airport pair (IATA codes) for a route-specific emissions estimate. CO₂ and full climate impact shown.
Try calculator →All five categories — transport, energy, flights, lifestyle, finance. Free PDF report with your ranked reduction plan.
Calculate my footprint →