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Although men continue to dominate the top of the world’s rich lists, an increasing number of women are climbing up the ranks too. However, when it comes to all of the billionaires on the 2019 Forbes rich list, only a mere 12% are women. Not only that, while 73% of male billionaires made their own fortunes, only 27% of female billionaires are self-made. That makes these self-made women billionaires featured in this list all the more interesting.

Diane Hendricks is the richest self-made woman in America with a huge $6.3 billion fortune. However she had a very humble upbringing. She grew up on a dairy farm and became a mother in her teens. She never went beyond high school and earned her diploma studying at home while pregnant. Despite all this, she co-founded and still chairs ABC Supply, now the nation’s largest wholesale roofing distributor, with a revenue of over $9 billion. Diane Hendricks’ background story is vastly different to that of Kylie Jenner. At the tender age of just 22, Kylie has built up a cosmetics empire, started a clothing line, and made millions promoting products on Instagram. She is now America’s youngest self-made billionaire, beating Mark Zuckerberg for the title, who was 23 when he became a billionaire. However, what the two stories show is that women from very different backgrounds can become entrepreneurs and ultimately find themselves on the list of the richest self-made women in the world.

Using data from Forbes’ richest self-made women list, we’ve looked at the richest women in the world who saw net worth increases between 2018 and 2019. This increase was then compared to the input salary to establish how long it took for the featured women to gain the same amount of wealth. Enter your salary into the tool to find out how long it takes the richest self-made women to earn your salary.