The AVoided Emissions and geneRation Tool (AVERT) evaluates how energy policies and programs such as energy efficiency, renewable energy, and electric vehicles lead to changes in emissions of particulate matter (PM2.5), nitrogen oxides (NOX), sulfur dioxide (SO2), carbon dioxide (CO2), volatile organic compounds (VOCs), and ammonia (NH3) from electric power plants at a county, state, or regional level. AVERT is a free tool designed to meet the needs of state air quality planners, energy officials, public utility commission staff, environmental agency staff, professionals in the clean energy field, people working on climate planning, and other interested stakeholders.

The CRREM tool allows investors and property owners to assess the exposure of their assets to stranding risks based on energy and emission data and the analysis of regulatory requirements.

The GHG Emission Calculator helps you calculate the environmental footprint created by a broad range of emission-generating activities. It simplifies the process of converting your operational activity data into CO2e (carbon dioxide equivalent) estimates, allowing you to understand your impact on the environment and identify actions to manage and reduce it. Operational activity data can be generated from any actions that result in greenhouse gas emissions, including vehicle rides, energy consumption, flights, logistical operations, manufacturing, agriculture, heating or cooling of buildings, and countless other daily activities. Using the Climatiq REST API, you can take data from your software and systems and automatically transform it into CO2e values, using emission factors from a range of validated sources available in the Open Emission Factor Database (OEFDB). The API is free (with registration) for limited non-commercial use, otherwise licence fees apply.

ENERGY STAR® is the government-backed symbol for energy efficiency. The blue ENERGY STAR label provides simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. With this powerful tool, you can estimate your building’s GHG emissions, support GHG emissions inventories, evaluate emissions under local building performance standards, and forecast the impact of changes in building efficiency and energy procurement.

This API returns datasets covering Scope 1, Scope 2 and Scope 3 emissions for a requested company. All the data is sourced from company publications and cdp.net. Historical data spans up to 10 years (which varies with company) The API requires free registration and optional usage declaration to receive an API key.

The Early Phase Integrated Carbon (EPIC) assessment is a whole life carbon tool built by EHDD to support climate-positive design decisions in early project phases when data is scarce but the potential for emissions reduction is high. To overcome the scarcity of data, EPIC uses a model that combines regionally-specific background data, forward-looking projections, peer-reviewed findings, and common sense assumptions to assess the relative impact of a variety of carbon reduction measures on a project’s embodied, operational, and landscape carbon footprints.

ICAO’s Application Programming Interface (API) Data Service contains the raw data collected and processed from different aviation authorities, Member States, other international organisations and NGOs. Registration required to get an API key with 100 free calls to test the ICAO API service. Additional calls require a paid subscription.

ICAO has developed a methodology to calculate the carbon dioxide emissions from air travel for use in offset programmes. The methodology applies the best publicly available industry data to account for various factors such as aircraft types, route-specific data, passenger load factors and cargo carried. The ICAO Carbon Emissions Calculator allows passengers to estimate the emissions attributed to their air travel. It is simple to use and requires only a limited amount of information from the user. ICEC is the only internationally approved tool to estimate carbon emissions from air travel.

ICAO has developed a methodology to calculate the carbon dioxide emissions from air travel for use in offset programmes. The methodology applies the best publicly available industry data to account for various factors such as aircraft types, route-specific data, passenger load factors and cargo carried. The ICAO Carbon Emissions Calculator allows passengers to estimate the emissions attributed to their air travel. It is simple to use and requires only a limited amount of information from the user. ICEC is the only internationally approved tool to estimate carbon emissions from air travel.

Impact is a digital visualisation tool that helps you understand your community’s carbon footprint. It works for parishes, wards and local authority areas. It helps identify the areas where taking action to tackle climate change can make the biggest difference.

A open access database of emission factors, designed to be constantly updated by contributors across the spectrum of sustainability researchers and professionals. It is freely available to all (with a sharealike license), and maintained and validated by the team at Climatiq The maintainers ambition is for this to be the world's most granular, accurate and up-to-date emission factor database, for all to use in their efforts to drive action on the climate crisis.

EPA created the Recycled Content (ReCon) Tool to help companies and individuals estimate embodied carbon, the climate footprint across the full lifecycle of purchasing and/or manufacturing materials with varying degrees of post-consumer recycled content. Estimates provided by the ReCon Tool are intended to support voluntary reporting initiatives, as well as EPA's Comprehensive Procurement Guidelines (CPG) Program and other Environmentally Preferable Purchasing activities.