How Many Miles Is a 5K? Plus 10K, Half, and Full Marathon

A 5K is 3.1 miles, which is exactly 5 kilometers, 5,000 meters, or about 16,404 feet. That single number is what most people come here for, so we put it first. But the 5K sits inside a whole family of race distances, and the moment you sign up for one, the next questions arrive fast. How does 3.1 miles compare to a 10K? How long will it take you to run or walk? How many steps is that? This guide answers all of it, with a converter you can use for any distance.

The "5K" name comes from the metric system: the K stands for kilometer, so a 5K is simply 5 kilometers. Race organizers around the world use kilometers because the metric distances are clean round numbers. Runners in the United States, who think in miles, then have to translate. That translation is the whole reason this page exists, and it never changes: 5 kilometers is always 3.1 miles.

Every race distance in miles and kilometers

Road races are almost always set in metric distances, then converted for runners who measure in miles. Here is the full ladder of common race distances, from a parkrun 5K up to a 50K ultramarathon, with each one shown in kilometers, miles, and meters.

Notice that a 5K is the shortest race on this list. It is the entry point to organized running, which is exactly why so many first-time runners start here. The jump from a 5K to a 10K doubles the distance to 6.2 miles, and a half marathon is more than four times a 5K at 13.1 miles.

What does 3.1 miles actually feel like?

A number on a page is hard to picture, so here is some real-world context. Three miles is roughly the length of 54 American football fields laid end to end, or about 12 to 13 laps of a standard 400-meter running track. If you drive at 60 mph, you cover a 5K in just over three minutes, which is why the distance feels short in a car and meaningful on foot.

For most people, 3.1 miles is a distance you could walk without much trouble but that takes real, sustained effort to run without stopping. That gap is the point. A 5K is long enough to be a genuine fitness goal and short enough that an untrained but healthy adult can reach it within a couple of months. It is the rare race distance that is both approachable and worth celebrating.

How long does it take to run a 5K?

Your 5K time depends on your pace per mile. Because a 5K is 3.10686 miles, you can estimate any finish time by multiplying your mile pace by 3.1. The table below does that math across the full range of paces, from a brisk walk to a competitive run.

The average recreational 5K finish time lands somewhere around 30 to 40 minutes, which means most runners hold a 10 to 12 minute mile pace. Do not be discouraged if you are slower than that at first. Finishing matters far more than your time on a first 5K, and pace improves quickly once you build a base of regular running.

Can you walk a 5K?

Absolutely, and many people do. Walking a 5K is a realistic goal for almost any healthy adult, and plenty of organized 5K events welcome walkers alongside runners. At a brisk 4 mph pace you will finish a 5K in about 47 minutes. At a more relaxed 3 mph pace it takes around 62 minutes. A run-walk approach, alternating short runs with walking breaks, usually lands between those two and is the method most beginner training plans recommend.

How many steps are in a 5K?

A 5K works out to roughly 6,200 steps when you run it and around 7,000 steps when you walk it. Running takes fewer steps because your stride lengthens, while walking uses a shorter, more frequent step. Your own number depends mostly on your height. A taller person with a longer stride covers the 3.1 miles in fewer steps than a shorter person. If you track your activity, completing a 5K will usually get you most or all of the way to a 10,000 step daily goal in a single outing.

5K, 10K, half, and full marathon: the step-up

Once a 5K feels comfortable, the natural next goal is a 10K at 6.2 miles, which is simply two 5Ks back to back. From there, a half marathon at 13.1 miles is a significant jump that rewards a structured training plan of 10 to 14 weeks. The full marathon at 26.2 miles is in a different category entirely and typically asks for several months of consistent mileage. The 5K is where almost every runner on that ladder began, which is what makes it such a valuable distance.

How the conversion works

The math behind every number on this page is one fixed ratio: 1 kilometer equals 0.621371 miles, and 1 mile equals 1.609344 kilometers. To turn any kilometer distance into miles, multiply by 0.621371. For a 5K that is 5 multiplied by 0.621371, which gives 3.10686 miles, rounded to 3.1. To go the other way, divide miles by 0.621371 or multiply by 1.609344. The converter above does this instantly for any distance, so you never have to do the arithmetic by hand.