The Happy Planet Index is not really about happiness, but tries to measure how well a country is able to transform its natural resources into well being. For that it takes life expectancy and levels of happiness from the World Happiness Report and divides it by the ecological footprint, which is trying to measure the resource impact.

The top three countries are: Costa Rica, Guatemala and Tajikistan

As for others Brazil is 10th, Germany 16th, UK 19th, Italy 23, Japan 33, France 39, China 51, India 65, Australia 103, USA 105

The full report is here:

https://happyplanetindex.org/wp-content/uploads/2026/07/HPI_2026_final0607_compressed.pdf