Many factors affect how much you are paid, including the sector you work in, your age and how long you have been in a job.
But thanks to a law forcing UK employers to publish details of the differences between male and female pay and bonuses for the first time, there is a new spotlight on how gender affects pay.
The average woman working full-time in the UK earns 9.1 per cent less than a man per hour. With part-timers included, the gap is 18.4 per cent.
Find out whether there is a gender pay gap for your job and, if so, what size it is, with our calculator below.
The calculator only has data for full-time workers.
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