How long is a 400-meter run in miles?

How long is a 400-meter run in miles? Ugh, metric conversions always mess with my brain! Seriously, I have to Google it every single time. 400 meters? That's a quarter of a mile, apparently. Which, you know, feels surprisingly short when you're actually doing it. I remember this one time in college, I was doing track practice – we had to do a bunch of 400s. A whole bunch. I felt like I was going to die. Each lap felt like an eternity, even though I know it's only a single lap around a standard track – like, one lap around an American football field – it's just that intense. Four 100-meter sprints, bam, bam, bam, bam – it's not a marathon, obviously, but it's definitely enough to make you want to collapse afterward. I mean, even just picturing it, I'm already slightly out of breath! So, yeah, a quarter mile. Short distance, massive effort sometimes. At least for me, anyway.