Monitoring of life quality, especially of people’s health condition is a decisive factor in establishment of priorities of social development. The WHO has introduced the quantitative index referred to as the Human Development Index – HID which takes into consideration three factors: medium length of life at birth, education and life standard. We found out, that HDI closely correlates with the healthy life expectancy and it is the index of probability of death at the age between 15 – 60 years. At the same time, it is also the index of probability of death of children below 5 years of age. There are also combined indices, e.g. social capital set from a bigger number of parameters, but its establishment often runs into the lack of reliable information. We suggest using the HDI to quantify the health dimensions of life quality, which enables to compare the life quality in single countries and its time trend can be studied well.