Published April 29, 2026 | Version 9.1
Software Open

Paris-compatible national CO2 budgets

Description

This Excel tool can be used to calculate Paris-compatible national CO2 budgets for all countries worldwide.

It allocates a global CO2 budget to countries using a weighted distribution key that takes into account countries’ shares of emissions and population in a base year.

This weighted distribution key reflects the two key dimensions of “current reality” and “climate justice”. For a discussion of further criteria, see the relevant excursus in: https://doi.org/10.5281/zenodo.4764408.

The tool also provides the latest emissions data from the EDGAR, EEA, UBA and GCP databases.

A preview of the Excel tool is shown here.

Simplified web applications are available here:

Detailed versions:

Short version (EDGAR): https://short.national-budgets.climate-calculator.info

Files

Instructions_tool_WP.pdf

Files (4.5 MB)

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Additional details

Additional titles

Subtitle (English)
Implicit and explicit weighting of the population in the allocation of a global CO2 budget

Related works

Is supplement to
Working paper: 10.5281/zenodo.4764408 (DOI)
Working paper: 10.5281/zenodo.4603032 (DOI)
Software: 10.5281/zenodo.4568839 (DOI)