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The gender wage gap does exist in Mass.

The state will unveil an online wage gap calculator Tuesday that will allow women to see how much they would earn over the course of their career if they were men, based on age and occupation data from the US Census.

The calculator is being released — along with a tool kit to help businesses ensure they are paying women equitably — on Equal Pay Day, a date that symbolizes how far into the year women have to work, on average, to make as much as men did the year before.

Treasurer Deb Goldberg plans an event at the Omni Parker House on Tuesday morning with business leaders and government officials to launch the tools and discuss the gender wage gap.


In Massachusetts, women employed full time make $11,152 less than men every year on average, an annual gap of $11 billion statewide, according to a study by the National Partnership for Women & Families.

The state-by-state analysis, conducted by the Washington advocacy group using US Census data, found that the median annual pay for a Massachusetts woman who works full time year-round is $50,459, compared with $61,611 for a man.

Massachusetts had one of the smaller income divides, with women making 82 cents for every $1 men make. Louisiana’s 35-cent gap was the largest, while New York’s was the narrowest, at 13 cents. (In Washington, D.C., it’s 10 cents, according to the study). The gulf between African-American, Latina, and Asian women and white men in Massachusetts is much wider, according to the study, at 61, 50, and 80 cents, respectively.

The analysis was released to help promote the national Paycheck Fairness Act, which would increase pay transparency and require businesses to justify pay grade differences.

In Massachusetts, the state Senate unanimously passed a pay equity bill earlier this year that would prohibit employers from seeking job candidates’ salary histories and establish a definition for “comparable work” to ensure that similar jobs have more equal pay. The legislation is being considered in the House Committee on Ways and Means.


On Wednesday, the Massachusetts Caucus of Women Legislators, made up of the 50 women legislators at the State House, and the Equal Pay Coalition, a group of organizations dedicated to shrinking the wage gap for women and people of color, will hold an event to encourage passage of the bill.

The City of Boston is also tackling the gender wage gap, gathering payroll data from local businesses broken down by sex, race, job category, and length of employment to measure the pay gap and guide solutions.

Katie Johnston can be reached at katie.johnston@globe.com. Follow her on Twitter @ktkjohnston.