How much farther is lane 8 on a track?

Where the lane lengths come from

World Athletics Technical Rule 14 sets the geometry. A standard track is 400 m, made of two straights and two bends of equal radius (TR 14.1). The distance is measured along an imaginary running line, not along the kerb:

• Lane 1 is measured 0.30 m outward from the kerb (TR 14.2).
• Every other lane is measured 0.20 m from the outer edge of the line on its inside (TR 14.4).
• Lanes are 1.22 m wide, give or take 0.01 m, including the line on the right (TR 14.4). Tracks built before 1 January 2004 may have lanes up to 1.25 m wide until they are fully resurfaced.

The straights are the same length in every lane. Only the bends differ, and two bends of 180 degrees make one full circle. So the extra distance in any lane is the circumference of a circle whose radius is the extra offset of that lane's running line:

lap(n) = 400 + 2π × ((n - 1) × 1.22 - 0.10) metres, for lanes 2 and up

The -0.10 is the difference between lane 1's 0.30 m offset and the 0.20 m offset of the other lanes. That formula is RUN.laneLap in this site's engine, and it matches the IAAF facilities manual's marking plan, where lane 1's running line has a radius of 36.80 m and the bends together come to 2 × 115.611 m.

Lap length in every lane

From lane 2 outward each lane adds 2π × 1.22 = 7.665 m per lap. Lane 2 adds 2π × 1.12 = 7.04 m, because its running line sits only 1.12 m further out than lane 1's. On an older track with 1.25 m lanes, lane 8 would be 454.35 m, another 1.32 m per lap.

What four laps in an outer lane add, in seconds

If you run 4 laps at a steady pace in an outer lane, the extra distance costs this much time (extra metres × pace per metre):

Worked by hand for lane 8 at 8:00 per mile: 480 seconds / 1,609.344 m = 0.2983 seconds per metre. 212.1 m × 0.2983 = 63.3 seconds. A single lap in lane 8 at that pace takes 2:15.1 instead of 1:59.3.

The other way round: lane 1 lap times in lane 8

The more common mistake on a crowded track is hitting lane 1 lap times while running wide. Because lane 8 is 13.26% longer, matching a lane 1 split there means running 13.26% faster than planned. A runner aiming for 8:00 per mile (1:59.3 laps) who hits 1:59.3 in lane 8 is actually running 7:03.8 per mile; a 10:00 runner doing the same is running 8:49.8. Even lane 2, at 1.76% longer, turns a 5000 m (12.5 laps) into an extra 88.0 m, worth 26.2 seconds at 8:00 per mile.

The track split calculator takes a lane and gives the real lap length and lap time at your pace, so you can set the right target before the session. The track pace chart lists 400 m, 200 m and 100 m times for every mile pace in lane 1.

Why races use staggers

Races run in lanes cannot start everyone on one line, or the outer lanes would run further. Rule 14.4 gives each athlete a separate lane in all races up to and including 400 m, so the start lines have to be staggered for every lane to cover the same distance. The stagger is the extra distance the lane adds over the bends the race covers:

• 400 m (two bends in lanes): the whole per-lap difference. Lane 8 starts 53.03 m ahead of lane 1, lane 4 22.37 m ahead.
• 200 m (one bend): half of it. Lane 8 starts 26.52 m ahead, lane 2 3.52 m ahead.

The 800 m is run in lanes only until the breakline after the first bend (TR 17.5.1), so its stagger is set by one bend plus the run to the breakline, which I have not computed here. These stagger figures are my calculation from the TR14 geometry, not marks read from a track plan.

The lap table above also explains a familiar training complaint: the same effort in lane 3 feels slower on the watch. It is not the legs; the lap is 14.70 m longer.

Indoor 200 m tracks

The indoor rules (TR 43) give a different track: a nominal length of preferably 200 m, two straights and two bends that may be banked, four to six lanes, and lanes between 0.90 m and 1.10 m wide. Lane 1 is measured the same way as outdoors. The same circle argument applies, so beyond lane 2 each lane adds 2π × the lane width per lap: 5.65 m for 0.90 m lanes, 6.28 m for 1.00 m lanes and 6.91 m for 1.10 m lanes. On a 200 m lap that is a larger share than outdoors: one lane out on a 1.00 m indoor track adds 3.1% per lap, against 1.9% for each lane beyond lane 2 outdoors. This ignores banking, which changes the geometry slightly, so treat it as an estimate. TR 44.4 sets the same principle for indoor starts: every start line, straight or staggered, must give every athlete the same distance along the shortest permitted route.

A note on 1600 m and the mile

Four laps of lane 1 are 1,600 m, which is 9.344 m short of a mile (1,609.344 m). Four laps of lane 2 overshoot it instead: 1,628.1 m, or 18.8 m more than a mile. So neither lane gives a mile in four laps unless the start line is moved. The pace converter turns any 400 m lap time into pace per mile or km on the exact distance, and the race distances page lists laps for every standard event. For road races, where the measured line is the shortest route rather than a lane, see how long a marathon really is.

Limits

These figures assume a standard 400 m track built to the rules: 1.22 m lanes, equal-radius bends, measured on the running line. Non-standard tracks (different bend radii, older 1.25 m lanes, school tracks of other lengths) will differ, and nobody runs exactly on the measuring line. The table gives the distance the rules define, which is the distance a lane-specific target should be based on.

Plan the session: track split calculator, track pace chart, pace converter.

Sources: World Athletics Book C, C2.1 Technical Rules (1 Nov 2019, amended 31 Jan 2020), Rules TR14, TR17, TR43 and TR44; IAAF Track and Field Facilities Manual 2008, marking plan for the 400 m standard track. Rules checked 7 October 2026. Found a problem? Tell us.

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