In the land of tape measures and rulers, “1 1 4” means one and a quarter inches. You know, that little line right after the 1-inch mark, halfway between 1 and 1.5? Yeah, that one. It’s written as 1 ¼” in proper notation, but people get lazy and drop the slash.
So 1 1 4 inches = 1.25 inches. Don’t let the weird spacing fool you—it’s not a secret code from IKEA manuals (though it might feel like one). Once you see it as 1.25, the whole “half of it” thing gets way easier.
Okay, so tell me: what is half of 1.25 inches?
Grab a calculator, or just your brain. Half of 1.25 is 0.625 inches. Yes, that’s six hundred twenty-five thousandths of an inch. Sounds scary, right? But in the real world, we call that five-eighths of an inch (5/8”).
You know that line between the ½-inch mark and the ¾-inch mark? That’s your 5/8. It’s the same as “half of 1 1 4.” Mind. Blown. You’ve probably grabbed that setting on a wrench or a socket without even realizing it.
