Gender Parity Index
Also known as: GPI, Education Gender Parity Index, UNESCO Gender Parity Index
The Gender Parity Index (GPI) is a simple, widely used indicator — standardised by the UNESCO Institute for Statistics — that expresses the value of an education statistic for females relative to males as a ratio. Most commonly applied to enrolment, completion, and literacy rates, a GPI of one signals parity, values below one indicate disparity favouring males, and values above one indicate disparity favouring females. It is the standard yardstick for monitoring gender parity in education, including in the Sustainable Development Goals.
Key highlights
- Extremely simple, transparent, and easy to communicate as a female-to-male ratio.
- Independent of absolute levels, so it isolates the gender gap from overall attainment.
- Standardised by UNESCO and adopted in SDG monitoring, ensuring comparability across countries and time.
- Applicable to any sex-disaggregated indicator, not only education, making it a flexible parity yardstick.
Intuition
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How it works
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When to use it
Use the GPI for transparent, level-independent monitoring of gender gaps in education and in other domains where a single female-to-male ratio is meaningful, such as labour-force participation. It is the official parity metric for several Sustainable Development Goal targets. It is less suitable as a summary of overall gender inequality, since it covers one indicator at a time and ignores absolute levels: a GPI of one says nothing about whether enrolment is high or low, only that it is equal between the sexes.
Strengths & limitations
- Extremely simple, transparent, and easy to communicate as a female-to-male ratio.
- Independent of absolute levels, so it isolates the gender gap from overall attainment.
- Standardised by UNESCO and adopted in SDG monitoring, ensuring comparability across countries and time.
- Applicable to any sex-disaggregated indicator, not only education, making it a flexible parity yardstick.
- Measures one indicator at a time and gives no composite picture of gender inequality.
- Being level-independent, it cannot reveal whether equal rates are high or low in absolute terms.
- Symmetric around one only in appearance: a ratio of 0.5 and a ratio of 2.0 represent opposite gaps of very different magnitudes on the multiplicative scale.
- For unfavourable indicators (dropout, out-of-school) the direction of interpretation reverses, which is easy to misread.
Common pitfalls
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Applications
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Frequently asked
What GPI counts as parity?
By convention, a GPI between roughly 0.97 and 1.03 is treated as parity, because small departures from exactly one arise from measurement noise and rounding. UNESCO and the SDG framework use this band so that monitoring focuses on meaningful gaps rather than statistical artefacts. Values outside the band indicate disadvantage for girls (below) or boys (above).
Can the GPI be above one?
Yes. A GPI above one means the female value exceeds the male value. In many countries this is increasingly common at secondary and tertiary enrolment, where girls now out-enrol boys. For favourable indicators a value above one signals disadvantage for boys; for unfavourable indicators such as out-of-school rates it signals disadvantage for girls, so interpretation depends on the indicator.
How is the GPI related to the Global Gender Gap Index?
The GPI is a single female-to-male ratio for one indicator. The WEF's Global Gender Gap Index aggregates many such ratios — capped at parity — across economy, education, health, and politics into a composite. In effect, the truncated education ratios inside the Gender Gap Index are GPIs; the GPI is the building block, while the Gender Gap Index is a multidimensional composite of similar ratios.
Sources
- 1.UNESCO Institute for Statistics (2009). Education Indicators: Technical Guidelines. UNESCO-UIS, Montreal.
- 2.UNESCO (2003). EFA Global Monitoring Report 2003/4 — Gender and Education for All: The Leap to Equality. UNESCO Publishing, Paris.
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Cite this page
ScholarGate. (2026, June 22). Gender Parity Index. ScholarGate. https://scholargate.app/gender-studies/gender-parity-index