Calculation of Paris-compatible national CO2 budgets

The app is based on the distribution of a global CO2 budget with a weighted key that takes into account a country's share of the world's population and of global emissions in the base year 2019. Thus, the distribution key reflects the current reality and climate justice.

In addition to CO2 budgets, emission targets are shown based on linear emission paths.

These three central framework data can be specified:

  1. Global budget
  2. Population weighting
  3. Potential for net negative emissions

The cells marked in yellow are input fields. Guidance and background information for the tool here.

Please note: If you download this Excel tool as a copy, you can save entries for yourself. In addition, you can then print out the results for all countries or have a corresponding PDF created. We will be pleased to send you a non-read-only version on request (

Mobile version of this tool:

Short version of this tool:

You can download a detailed Excel tool for calculating Paris-compatible CO2 budgets for all countries in the world: In this tool, for example, you can choose to distribute the global budget from 2016 instead of 2020.

Tools for calculating Paris-compatible emission paths

From an overall climate policy perspective, emission paths other than linear ones may make more sense. Therefore, we offer tools that cover the entire range of plausible emission paths:

Latest publications on the Extended Smooth Pathway Model (ESPM)

We refer to the procedure of deriving a national CO2 budget from a global CO2 budget and deriving plausible national emission paths that adhere to the national CO2 budget as the Extended Smooth Pathway Model (ESPM). Here a brief description of the ESPM.

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