SSFSSR Web Calculator

SSFSSR is an indicator developed to measure the extent to which each country can meet its domestic food supply through its own food production. This database was developed in accordance with the 10 Principles for Calculating Food Self-Sufficiency Ratios (10-PCFSSR).

To the best of the knowledge of the Development Research Group, this is the world's first public application designed to calculate and present national food self-sufficiency ratios in a unified manner under common conditions.

Main Data Sources

• FAO FAOSTAT, Food Balances (2010-)
• Where necessary: World Bank Open Data, USDA open data, and national government statistics

1. A sufficient number of food items and an appropriate balance among them must be ensured.
2. Primary and secondary products must both be appropriately represented, and their differences must be reflected in the calculation.
3. In principle, the same dataset must be used for calculating food self-sufficiency ratios across countries.
4. All data used in the calculation must be publicly available free of charge and be reliable.
5. The data sources used in the calculation should be concentrated in one place.
6. Continuity in the data used must be ensured.
7. If estimates are included, the reasons for and methods of estimation must be clearly stated.
8. The calculated results must be reproducible.
9. The method must be applicable under common conditions across countries.
10. The formula must be clear and publicly disclosed.

• Goro Takahashi, A New Method for Calculating the Food Self-Sufficiency Ratio: Supply-Side Food Self-Sufficiency Ratio
  Springer Nature: https://link.springer.com/article/10.1186/s40066-025-00570-z (65-commodity basis)
• SSFSSR Version 1.1 - Formal Specification, PPCR Structural Coefficients, 64-Commodity Framework, and 2023 Global Dataset
  Zenodo: https://doi.org/10.5281/zenodo.18889852 (64-commodity basis)

In this database, 64 commodities are classified into primary and secondary products. All are converted into a primary-product basis in caloric terms using PPCR (Primary Product Conversion Rate).

1. The figures in this database are research values derived using academic methods and may change if the underlying data used for calculation are revised. Please keep this point in mind when using them.
2. The developer makes no warranties regarding accuracy, completeness, or timeliness. The developer shall not be held liable for any errors or consequences arising from use.
3. Users are responsible for compliance with applicable laws in their jurisdictions.
4. This database may be updated, revised, or discontinued without prior notice.
5. When using this database, users must provide proper attribution in accordance with the prescribed citation format.
6. Commercial use, redistribution, or large-scale reproduction requires prior written permission.

@misc{takahashi_ssfssr_database_2026,
  author    = {Goro Takahashi},
  title     = {Supply Side Food Self-Sufficiency Ratio
               (SSFSSR) Database, 2010--2023},
  year      = {2026},
  publisher = {SSFSSR Development Research Group},
  howpublished = {\url{[https://ssfssr-app.github.io/ssfssr-app/]}}
}

Before publication, replace [https://ssfssr-app.github.io/ssfssr-app/] with: https://ssfssr-app.github.io/ssfssr-app/

Copyright 2026 Goro Takahashi / SSFSSR Development Research Group. All rights reserved.

Permitted Uses

• Non-commercial academic research and education, including NGO activities
• Policy analysis and governmental research
• Reproduction of limited extracts with proper citation

Restricted Uses

• Commercial redistribution or resale
• Incorporation into another database without permission
• Use without attribution

We welcome inquiries regarding methodology, citation, and permissions. Replies will be provided when necessary.