How Long Is a Running Track? 400m Standard Explained

A standard outdoor running track is 400 meters long when measured around lane 1, which is the innermost lane. That means four laps equal 1,600 meters — just short of a full mile, which takes about 4.02 laps. Whether you are training for a race, coaching a school team, or just curious about the oval at your local park, this guide breaks down every key measurement, from lane widths and straightaways to indoor tracks and exchange zones.

The 400-meter oval became the global standard when World Athletics (formerly the IAAF) adopted it, replacing the older 440-yard tracks. The measurement is taken 30 centimeters out from the inner edge of lane 1, which accounts for the fact that runners cannot hug the curb perfectly. All the dimensions below follow that standard, with conversions to feet and inches where they help.

Running Track Conversion Chart

Measurement	Metric	Imperial
One lap, lane 1	400 m	1,312 ft (about 0.25 mile)
Lane width	1.22 m	4 ft
Straightaways	84.39 m each	276.9 ft each
Curve radius	36.5 m	119.75 ft
Indoor track lap	200 m	656 ft
One mile	1,609.34 m	~4.02 laps of a 400 m track
100 m straight	100 m	328 ft
Track surface thickness	13–19 mm	0.5–0.75 in

Core Track Dimensions

#	Feature	Measurement
1	Lap length, lane 1	400 m (1,312 ft)
2	Lane width	1.22 m (4 ft)
3	Number of lanes	8–9 (standard)
4	Straightaway length	84.39 m (276.9 ft) each
5	Curve radius	36.5 m (119.75 ft)
6	Track width, 8 lanes	9.76 m (~32 ft)
7	100 m straight section	100 m (328 ft)
8	110 m hurdles straight	110 m (361 ft)

Markings, Zones and Variations

#	Feature	Measurement
9	Indoor track lap	200 m (656 ft)
10	Lane 8 lap length	~453 m (~1,486 ft)
11	Exchange zones (4×100 m)	30 m (20 m zone + 10 m acceleration)
12	Steeplechase water jump	3.66 m square pit
13	High school track laps per mile	~4.02 laps
14	Track surface thickness	13–19 mm (0.5–0.75 in)
15	Infield size	Fits a full soccer field

1. Lap Length in Lane 1: 400 Meters

The headline number: one lap around the inside lane of a standard outdoor track is exactly 400 meters, or about 1,312 feet. This is measured 30 centimeters (roughly one foot) outward from the raised inner curb, because runners naturally run slightly wide of the edge. Four laps make 1,600 meters, the classic “metric mile” raced at the Olympics, and most runners check their watch at each 400-meter split. If you run in lane 1 the whole way, you can trust the 400-meter figure — it is the certified standard every record depends on.

2. Lane Width: 1.22 Meters (4 Feet)

Each lane on a standard track is 1.22 meters wide, which is almost exactly 4 feet. The lane lines themselves are 5 centimeters (2 inches) wide, and the measurement of each lane includes the line on its right. Four feet gives a runner enough room to swing their arms without clipping a neighbor, even at full sprint, though in a crowded 1,500-meter start it still feels tight. Older tracks built to imperial specs used 4-foot lanes too, which is why the metric standard landed so neatly on the old number.

3. Number of Lanes: 8 or 9

A standard competition track has 8 lanes, and many modern stadiums build 9 so one lane can stay open for warm-ups during a meet. High school tracks sometimes have only 6 lanes to fit a smaller footprint, which is fine for dual meets but limits bigger invitationals. Each additional lane adds 1.22 meters to the track’s overall width, so a 9-lane track is about 11 meters wide from inner curb to outer edge, and the outer lanes also need a wider safety margin beyond them. More lanes mean bigger meets, since sprint finals can host more runners at once.

4. Straightaway Length: 84.39 Meters Each

Each of the two straightaways on a 400-meter track measures 84.39 meters — about 277 feet. The straights connect the two semicircular curves, and together the two straights plus the two curves add up to the full lap. On the home straight you will find the common finish line, which every race from the 100 meters up to the 10,000 meters uses. Walking a straightaway takes roughly a minute at a relaxed pace.

5. Curve Radius: 36.5 Meters

The curves at each end of the track are semicircles with a radius of 36.5 meters, or just under 120 feet. This radius is measured to the running line in lane 1. The 36.5-meter radius is what makes the standard track’s geometry work: two semicircles of that radius give 229.34 meters of curve, and two 84.39-meter straights add 168.78 meters, with the lane-1 measurement offset bringing the total to exactly 400 meters. Tighter curves would slow runners down; this radius keeps 400-meter runners at speed.

6. Total Track Width: About 9.76 Meters for 8 Lanes

Eight lanes at 1.22 meters each make the running surface 9.76 meters wide — roughly 32 feet from the inner curb to the outer edge. Add a margin of safety outside lane 8 and the paved area around a track is wider still. This is worth knowing if you are planning a facility: the track alone needs a strip of land over 10 meters wide wrapping the entire oval, and the infield inside it is big enough for a soccer pitch.

7. The 100-Meter Straight: 100 Meters of Straight Track

The 100-meter dash is run on an extended straight section, usually the home straight lengthened to a full 100 meters (328 feet). The start line sits beyond the normal curve, and runners get a straight, unobstructed run to the shared finish line. Because it is perfectly straight, the 100 meters is the purest test of raw speed in the sport — no curves, no lane stagger, just acceleration and top-end speed.

8. The 110-Meter Hurdles Straight: 361 Feet

The men’s 110-meter hurdles and women’s 100-meter hurdles are also run on the home straight, extended slightly past the 100-meter start. The 110-meter hurdles start line sits about 13.72 meters before the 100-meter start. Ten hurdles are spaced 9.14 meters apart in the men’s race. The straight needs to be long enough for the run-in, the hurdles, and a safe slowdown zone past the finish.

9. Indoor Track: 200 Meters Per Lap

Indoor tracks are standardized at 200 meters per lap — exactly half the outdoor distance. Because they fit inside arenas, indoor tracks have much tighter curves, and many are banked so runners can hold speed through the turns; the banking can rise noticeably on the outside edge, almost like a velodrome. A 200-meter indoor oval typically has 6 lanes rather than 8, since space is tight. Eight laps make 1,600 meters indoors, and the mile is about 8.04 laps. If you have only ever run outdoors, your first banked indoor turn feels surprisingly steep, and pacing is trickier because the laps tick by twice as fast.

10. Lane 8 Lap Length: About 453 Meters

Here is the number that surprises people: running one lap in lane 8 covers roughly 453 meters — about 53 meters more than lane 1. Every lane outward adds about 7 meters per lap because of the wider curve radius. This is why staggered starts exist: in a 400-meter race, the runner in lane 8 starts about 53 meters ahead of the runner in lane 1 so everyone runs the same distance. The stagger is painted on the track as a curved waterfall of start lines.

11. Relay Exchange Zones: 20 to 30 Meters

In the 4×100-meter relay, each exchange zone is 30 meters long — a 20-meter takeover zone plus a 10-meter acceleration zone before it. The outgoing runner starts running inside the acceleration zone, builds to near full speed, and receives the baton within the 20-meter zone, ideally at the far end to maximize the team’s speed through the exchange. In the 4×400-meter relay, the zone is 20 meters. Officials watch these zones closely: a baton passed outside the zone means disqualification, which has ended more than one medal hope.

12. Steeplechase Water Jump: 3.66 Meters Square

The steeplechase water jump pit is 3.66 meters square (12 feet by 12 feet), with the water deepest — about 70 centimeters — right at the barrier and sloping up to track level at the far end. Runners clear a 91.4-centimeter barrier (36 inches for men) and land in the water, which is why steeplechasers finish races soaked. The water jump is usually placed on a curve, either inside or outside the track, and the pit’s exact placement varies by stadium.

13. High School Tracks: 4.02 Laps to the Mile

Most high school tracks in the United States are standard 400-meter ovals, so a mile takes about 4.02 laps — the same math as anywhere else. Some older schools still have 440-yard tracks, on which a mile is exactly 4 laps. If you are training on a school track, check whether it is metric or imperial before trusting your splits — a quick check with a measuring tape along the home straight will tell you. A surprising number of runners have trained for months on a mismeasured track and wondered why race day felt different.

14. Track Surface Thickness: 13 to 19 Millimeters

Modern synthetic track surfaces — the springy red or blue material you see at stadiums — are typically 13 to 19 millimeters thick (about half to three-quarters of an inch), laid over an asphalt or concrete base. The surface is made of rubber granules bound in polyurethane, and its thickness and density are tuned to return energy to the runner’s stride — 13 millimeters is about as thick as a stack of 17 credit cards. This is a big reason track times keep dropping: the surface itself is engineered for speed, unlike the cinder tracks of decades past.

15. The Infield: Room for a Full Soccer Field

The grass infield inside a standard 400-meter track is large enough to hold a full-size soccer field, which is why so many stadiums double as football venues. The infield measures roughly 100 meters long by 60-plus meters wide inside the curb. Field events — long jump, high jump, pole vault, throws — are set up around and within it during track meets. If you are standing in the middle of a stadium infield, the track feels enormous; from the stands, the runners make it look small.

Frequently Asked Questions

How many laps is a mile on a standard track?

A mile is 1,609.34 meters, so on a 400-meter track it takes about 4.02 laps. Four laps give you 1,600 meters — just 9.34 meters short of a full mile. Many runners just run 4 laps and call it close enough for training.

How wide is each lane on a running track?

Each lane is 1.22 meters wide, which is essentially 4 feet. Lane lines are 5 centimeters wide, and a standard 8-lane track is 9.76 meters across from the inner curb to the outer edge.

How long is an indoor running track?

A standard indoor track is 200 meters per lap — half the outdoor distance. Indoor tracks usually have 6 lanes and banked curves to help runners hold speed on the tighter turns. Eight laps make 1,600 meters indoors.

Why do runners start at different points in a 400m race?

Because outer lanes are longer — lane 8 covers about 453 meters per lap versus 400 in lane 1. The staggered start gives outer-lane runners a head start of up to about 53 meters so everyone runs exactly the same distance to the finish line.

Final Thoughts

The 400-meter track is one of the most precisely measured surfaces in sports, and now you know its anatomy: the 84.39-meter straights, the 36.5-meter curve radius, the 1.22-meter lanes, and the 200-meter indoor version with its banked turns. Whether you are counting 4.02 laps for a mile, marveling at a 53-meter stagger in lane 8, or just jogging the oval at your local park, these dimensions are the quiet framework behind every race. They decide where records can fall and where tactics unfold. From the 30-centimeter measurement offset in lane 1 to the 20-meter exchange zones, precision is the whole point. Next time you watch a meet, notice the exchange zones, the water jump, and the banked indoor curves — you will be seeing the geometry that makes the sport work, measured to the centimeter.