noun
level of happiness; degree of happiness
Used in surveys, economics, and everyday contexts to quantify how happy people are.
この調査では、各国の幸福度を比較している。
This survey compares the level of happiness in each country.
収入が増えても幸福度はあまり変わらないという研究がある。
There is research showing that even if income increases, the degree of happiness doesn't change much.