About ShoeSizeConverter.org
ShoeSizeConverter.org is a free tool for converting shoe sizes between the US, UK, European, Australian, Japanese, Korean, Chinese and Mexican systems, with width sizing and foot-length lookup built in. It exists for one job: you have a size in one system and you need the equivalent in another, fast, without creating an account or scrolling past a wall of ads to reach the answer.
We built it because most existing converters fall short in the same ways. They skip the systems people actually struggle with — Australian and Korean sizing in particular — bury the result behind pop-ups, or treat the page as a funnel to sell shoes rather than to answer the question. We wanted the opposite: every system on one page, the answer first, and the reasoning available if you want it.
How our conversions work
Every conversion on this site comes from static lookup tables, not a formula. That is a deliberate choice. Shoe sizing does not convert cleanly with arithmetic: half-size steps differ between systems, the European Paris-point scale does not line up with US half-sizes, and individual systems carry quirks that a single equation gets wrong. So we anchor every row to one honest reference — foot length in centimetres — and map each national size to it.
That foot-length anchor is why the tool can be precise about the things that trip people up: European sizes that are written as a range like "38–39"; Japanese sizes that are simply your foot length in centimetres; Korean sizes given as foot length in millimetres; and the Australian rule that catches almost everyone — women's AU sizing follows the US scale while men's AU sizing follows the UK scale. Where a true equivalent does not exist, we show N/A rather than invent a number.
How we keep it accurate
Conversions are cross-referenced against published manufacturer and national size charts, and the brand fit guidance (whether a label runs small, large, wide or narrow) reflects the consistent consensus across each brand's ranges. Sizing is still approximate by nature — a last shape can shift the real-world fit half a size either way — which is why every page reminds you to check the product's own chart before buying, and why measuring your foot is always the most reliable starting point. If you spot a row that looks wrong, please tell us; corrections are the fastest way the data improves.
What we don't do
There is nothing to sign up for, we don't ask for your email, and the page is built to load fast and stay light. The data is static and the tool runs entirely in your browser. We do use affiliate links to retailers and may show advertising to keep the site free — both are clearly disclosed, and neither changes the conversion you came for.