How fast can a human run?

Watch a 100 m final and the sprinters seem to fly from gun to tape. They don't. Even Usain Bolt spent his first 30 meters getting up to speed, held his top speed for a short stretch in the middle and was slowing slightly by the finish. That shape explains most of what people want to know about how fast humans can run, from Usain Bolt's top speed to how fast you could chase down a bus today.

If you're asking because you feel slow, you're in good company. Most adults stop sprinting sometime after school, and the first all-out dash in years tends to end with tight hamstrings and a promise never to try again. Speed is one of the first things people stop practicing, and it's also a quality that responds when you practice it again.

Below you'll find the main numbers in mph and km/h, Bolt's official split times, the fastest women's speeds, the research on what limits top speed, how fast the average person sprints, how speed falls over longer races, the age when sprinters peak and how people compare with animals. Our page on the average running speed covers everyday running pace in more depth.

How Fast Can a Human Run in mph and km/h?

It depends on who's running and for how long. This table lines up the main speeds on this page, from Bolt's best 20 meters down to an ordinary walk:

Speeds over a full 100 m include the standing start, so they sit well below each runner's top speed. The everyday run speeds come from wearable data on 4,645 runners in a study by Selinger and colleagues (2022), and the walking figure comes from our page on the average walking speed. The other rows are explained in the sections below.

How Fast Is Usain Bolt? The Official Splits From His 9.58

Usain Bolt ran 100 m in 9.58 seconds at the World Championships in Berlin on August 16, 2009, with a legal tailwind of 0.9 meters per second and a reaction time of 0.146 seconds, according to the official World Athletics results. Nobody has run faster since. Split times from the championship's biomechanical reports, as tabulated in Haugen's review, show where the speed came from:

Split times at 30, 60, 80 and 100 m from Haugen and colleagues (2019), Table 1, which is based on biomechanical reports from international championships. The speeds are our arithmetic.

Bolt's top speed came between 60 and 80 meters, which he covered in 1.61 seconds. That's 12.42 meters per second, the 44.72 km/h, or 27.8 mph, you'll see quoted as Usain Bolt's top speed. Over the last 20 meters he slowed to 12.05 m/s. That fade is normal: Haugen's review notes that even elite sprinters can hold their maximal velocity for only about 10 to 30 meters.

Laser measurement of the same race gives a slightly lower peak. Three laser devices tracked Bolt from behind the start line 100 times a second, and a 2023 analysis of that data by Štuhec and colleagues found a peak of about 12.3 m/s, or 27.6 mph (44.4 km/h), with his speed above 12 m/s for the whole second half of the race. The gap is small, and it sits within what the timing allows. Split times are rounded to the hundredth of a second, and one hundredth changes a 20-meter speed by about 0.6 percent. So Usain Bolt's max speed lies somewhere between 27.5 and 28 mph.

The same analysis counted 41 steps, about four fewer than the other finalists averaged. Bolt's steps averaged about 2.45 meters against 2.23 meters for the rest of the field, while his step rate, about 4.5 steps a second, was no quicker than theirs. His legs turned over at the same rhythm as everyone else's, and each step carried him further.

Four days later he ran the 200 m in 19.19 seconds into a 0.3 m/s headwind, which is still the world record, according to the official results. That averages 10.42 m/s, nearly the same as his 100 m, because only the first half of a 200 m includes a standing start.

The 100m Race World Record and the Fastest People Ever Timed

The 100m race world record is 9.58 seconds for men and 10.49 seconds for women. Florence Griffith-Joyner set the women's mark in July 1988, according to the World Athletics 100 m page. She ran it at the US Olympic Trials in Indianapolis, and that September she set the 200 m record of 21.34 at the Seoul Olympics, per the 200 m page. So the fastest person in the world, by every official measure, is still Usain Bolt, and the fastest woman ever timed is Griffith-Joyner.

Her 100 m record averages 9.53 m/s, or 21.3 mph. It has carried a question mark for decades. In his analysis of running-speed limits, the biologist Mark Denny (2008) used 10.61 seconds as the women's benchmark instead, because of evidence that the 10.49 race was wind-aided. The time still stands in the record books.

For a cleaner look at women's top speed, use the split data. Women who ran 10.61 to 10.70 seconds at international championships covered 60 to 80 meters in an average of 1.87 seconds, which is 10.7 m/s, or about 23.9 mph and 38.5 km/h, according to Haugen's table. The same review puts women's maximal velocity about 10 percent below men's. The world records agree: the women's 100 m, 200 m and 400 m marks are about 9 to 10 percent slower than the men's, by our arithmetic.

Who Are the Fastest Runners in the World?

On the all-time lists, the sprints still belong to two athletes whose records have stood for 17 and 38 years. Bolt holds both the 100 m and 200 m world records, set in 2009. Griffith-Joyner holds both women's records, set in 1988. One lap is newer: Wayde van Niekerk's 43.03 in the 400 m at the 2016 Rio Olympics is the men's record, per the official results, while Marita Koch's 47.60 for women has stood since 1985, according to the World Athletics 400 m page.

What Limits How Fast a Human Can Run?

Speed is stride length times stride rate, and the research points firmly at length. In a classic treadmill study, Weyand and colleagues (2000) took 33 people of very different sprinting ability up to their top speeds, which ranged from 6.2 to 11.1 m/s, or 13.9 to 24.8 mph. Slow and fast runners swung their legs through the air in about the same time. The difference was force: a runner topping out at 11.1 m/s applied about 1.26 times the average ground force of one topping out at 6.2 m/s. Our guide on how to run faster builds a training plan on that finding.

So why can't a sprinter just push harder? A follow-up by Weyand and colleagues (2010) put seven athletic people on a high-speed force treadmill. At top running speed each foot stayed on the ground for about 0.108 seconds. When the same people hopped on one leg, with each contact lasting about 0.160 seconds, they hit the ground far harder: about 2.7 times body weight on average during contact, against 2.1 when sprinting, with peaks of 4.2 and 3.6 times body weight. Their legs could produce more force than sprinting asked of them. What they lacked was time. At top speed the limit is how much force your muscles can apply in that tenth of a second.

Direction matters as much as size. During acceleration, runners who aimed more of their push forward ran faster 100 m times. That held in 12 physically active men, two of them sprinters (Morin and colleagues, 2011), and in 13 runners ranging from non-specialists to a world-class sprinter. In that second group, the orientation of the push was linked to performance while its total size wasn't (Morin and colleagues, 2012).

Put together, a fast human has four things going for them:

• Long, forceful steps rather than quick legs. Bolt took 41 steps to the rest of the final's 45 or so, at a similar rhythm.
• A big push in a short window. At maximal velocity an elite sprinter's foot is on the ground for about a tenth of a second or less.
• A forward-directed push while accelerating, which decides how quickly top speed arrives.
• The ability to hold speed, since even the best fade after 10 to 30 meters at their maximum.

Has a Human Ever Run 30 mph?

No. Nobody has been timed at 30 mph, or even at 28. Bolt's 27.8 mph between 60 and 80 meters is the fastest timed stretch on record, and the laser peak from the same race was a little lower. Could a human run 28 mph one day? Probably, but the margin above Bolt is small.

Denny fitted three statistical models to the history of race results to estimate how fast greyhounds, racehorses and elite athletes could ever get. For the men's 100 m he predicted an absolute limit of about 9.48 seconds, an average of 10.55 m/s. For women he predicted about 10.39 seconds. He made that estimate when the record stood at 9.69. A year later Bolt ran 9.58, about 1 percent away from the predicted ceiling.

You may see claims online that humans could reach 35 or 40 mph. Those are theoretical estimates, not measurements, and no timed run has come anywhere close.

How Fast Can the Average Person Run?

Among people who time themselves, a 100 m sprint averages roughly 10 to 20 mph from a standing start. The best large dataset we could find comes from Running Level, a site where runners log race and time-trial results. Running Level screens out implausible, duplicated and automated submissions, which leaves 16,083 qualifying 100 m results logged between November 2020 and October 2026. Just 1,219 of them are from women, so treat the women's column with more caution.

Source: Running Level overall 100 m standards, which match its standards for age 20, accessed October 29, 2026. Its "Intermediate" level, faster than half of logged runners, is the median row here. Average mph over the full 100 m is our arithmetic.

Read these with two caveats. First, these are people keen enough to time a sprint and log it, so the whole population is slower. Second, they're averages from a standing start, which means every one of these runners was moving faster than the number in the table during the middle of the sprint. The lab range is useful here as well: the 33 people in Weyand's study topped out between 13.9 and 24.8 mph, though that group was a lab sample of mixed ability rather than a cross-section of the public.

Day to day, people run far slower than they sprint. In Selinger's wearable data from 37,201 everyday runs, women averaged 2.74 m/s (6.1 mph) and men 3.25 m/s (7.3 mph). Our page on the average running speed breaks that down by distance, age, sex and experience, and converts treadmill speeds into pace.

How Fast Can Humans Run Over Longer Distances?

Top speed lasts a couple of seconds, so world-record pace drops as races get longer. The men's records show the curve clearly:

Records from World Athletics: the official Berlin 2009 and Rio 2016 results, and its 800 m, 1,500 m and 5,000 m event pages. Average speeds are our arithmetic.

The 200 m keeps almost the same average as the 100 m because it has only one standing start. After that, every step up in distance costs speed. The 400 m record is about 11 percent slower than the 100 m, the 800 m about 24 percent and the 5,000 m about 37 percent, as more and more of the energy has to come from aerobic metabolism.

At the far end, a two-hour marathon means averaging 21.1 km/h (13.1 mph) for 42.2 km, and the men's record now sits just under that line. Our page on how long a marathon is has the record and the typical finish times. When Jones and colleagues (2021) tested 16 world-class male runners at that pace, the ones who reached a steady state were working at about 94 percent of their peak oxygen uptake. The authors calculated that a 59 kg runner would need to sustain an oxygen uptake of about 67 ml per kilogram per minute for the full two hours.

Women's records follow the same curve. Griffith-Joyner's 21.34 in the 200 m averages 21.0 mph, and Koch's 47.60 in the 400 m averages 18.8 mph.

At What Age Do Sprinters Peak?

World-class sprinters usually peak at 25 to 26 years old, according to Haugen's review. By their early 20s the best are already close to their ceiling: among the world's top 100 sprinters at that age, the average improvement was only 0.1 to 0.2 percent a year.

After the peak, top speed falls slowly but steadily. In 77 competitive male sprinters aged 17 to 82, Korhonen and colleagues (2009) found that older sprinters were slower mainly because their strides were shorter and their feet stayed on the ground longer. Their step rate and leg swing barely changed. Ground forces were lower, and so were muscle thickness and the size of the fast-twitch (type II) muscle fibers. So sprinters lose speed through the same lever that separates fast and slow runners at any age: force against the ground.

That's encouraging for the rest of us. Force comes from muscle, and muscle keeps responding to strength and power training as you age. You can't stop the clock, but you can slow what it does to your speed.

How Fast Can a Human Run Compared With Animals?

Humans are slow by animal standards. The best measurement of a wild cheetah's top speed comes from Wilson and colleagues (2013), who fitted GPS and motion-sensing collars to five cheetahs in Botswana and recorded 367 runs. The fastest hit 25.9 m/s, or 58 mph (93 km/h), more than twice Bolt's top speed. Most hunts, though, involved only moderate speeds, and the collars recorded some of the highest acceleration and braking values measured in any land mammal.

Racing animals set the next marks. In Denny's data, greyhound records over 460 to 480 meters and thoroughbred records over about 1.2 to 1.5 miles both average close to 17 m/s, roughly 37 to 38 mph (60 to 61 km/h). A racehorse holds a pace about a third faster than Bolt's best 20 meters for more than a mile.

Where people stand out is distance. In their review of human evolution, Bramble and Lieberman (2004) describe humans as poor sprinters compared with most four-legged animals but remarkably good endurance runners, and they argue that endurance running helped shape the human body. A person will never outsprint a greyhound, but over long distances people hold their own against most mammals.

How to Run Faster Than You Do Today

You'll never run 27.8 mph, and you don't need to. Your own top speed is still trainable, because the qualities behind it, power, technique and the ability to hold speed, all respond to training, as Haugen's review describes. For an adult who hasn't sprinted in years, these four habits cover most of it:

• Sprint a little, often. After an easy run, add four to six relaxed fast runs of 10 to 20 seconds at about 85 to 90 percent effort, walking back between each one. Twice a week is plenty.
• Start uphill. Short hill sprints keep speeds lower and make it hard to overstride, which suits a beginner. Our guide to hill sprints has a starter protocol.
• Build force twice a week. Goblet squats, split squats, dumbbell Romanian deadlifts, step-ups and calf raises, plus a few sets of squat jumps, train the push that top speed depends on.
• Earn the all-out efforts. Warm up for 10 minutes and build effort over several sessions before you try a true maximal sprint.

For the rest of the picture, from easy mileage to intervals, the run faster guide above lays out a full week.

What This Means for You

The ceiling for a human is about 28 mph, held for a couple of seconds by the fastest person who has ever lived. The rest of us live lower on the scale. People who time themselves average roughly 15 to 18 mph over a 100 m sprint, and most everyday runs happen at 6 to 7 mph. None of those numbers is fixed. Strength work, short sprints and patience move them at any age.

What usually stops people is the third week, when the novelty has worn off and the strength sessions quietly slip. Tim found the missing piece in coaching: "I didn't think an app could replace my trainer. My AI coach proved me wrong."

Strength sessions are easy to let slide, and that's where a workout app that keeps you motivated earns its place. FitCraft's 3D AI coaches show you each bodyweight and dumbbell move in an interactive demo and say your name as you train. Your workouts adjust as you progress, and streaks and leaderboards give you a reason to come back on the days motivation dips.