Gender wage gap is a well know and thoroughly researched phenomenon. The gender pay gap calculator lets you calculate how much you would earn as a member of the opposite sex in your country. If you feel this issue deserves more public awareness, please consider sharing this calculator on Facebook or Twitter (buttons in the top-right corner).
From the math perspective, the gender wage gap is defined as the difference between male and female median wages divided by the male median wages. Put in simple terms it is a difference in earnings between women and men of the same productivity. All around the world it is women who make less than men. If you're interested in gender wage gap statistics go to the bottom of this page where you will find data for 41 countries.
The study of wage discrimination began in 1957 with the work of Becker (Becker, G. S., 1957, The Economics of Discrimination. Chicago: University of Chicago Press) and since then it became a routine task of labor economists. Wage discrimination overwhelmingly affects women, irrespective of their age or level of education. It is influenced by a number of interrelated work, family and societal factors. These include:
OECD's Council on Gender Equality in Education, Employment and Entrepreneurship issued following recommendations for battling gender based salary inequalities:
You cannot eradicate all sources of discrimination in earnings, but there is a couple of things you can do as a woman to lesser the gap:
We've taken the data from Eurostat OECD and GUS (Polish main statistics office). In those cases where datasets overlapped (for example, both databases contained the statistics about Germany), we took data from the body that's more "local" (Eurostat for European countries).