Is 21/32 the same as 5/8 or just really close?

If you're staring at a drill bit or a blueprint wondering is 21/32 the same as 5/8, the quick answer is that they are definitely not the same value. They might look nearly identical when you're just eyeballing a ruler, but in the world of math and precision measurements, that tiny little gap actually matters. ...

February 22, 2026 · 7 min · Joanou Rodrigues