Stack Overflow used data from their developer survey to build a prediction model for salary, based on role, location, education, experience, and skills. The result was a salary calculator that you can use to gauge how much you should be making.
In this salary calculator, we report a predicted salary for the location, education, experience, and other information you enter. We also report a 50% prediction interval. The specific statistical meaning of this interval is that we expect 50% of people with the same characteristics as you to have salaries within that range; it spans the 25th to 75th percentiles. The interval is just as important as the prediction itself (the 50th percentile), because it gives you an understanding of what the range of expected salaries could be.