Indoor Track Sizes: Banked, Flat and Oversize
August 28, 2026 路 2 min read
A standard indoor track is 200 meters, half the outdoor 400m. Eight laps and a bit make a mile, the turns come around twice as often, and how those turns are built is the single biggest thing separating one indoor facility from another.
The four kinds of indoor track
| Type | What it is | Speed |
|---|---|---|
| Banked 200m | Turns raised toward the outside | The fast standard; NCAA championships run on these |
| Flat 200m | Level turns | Slower through every curve; most school facilities |
| Oversize | Over 200m, often ~300m | Treated as equal to banked by the NCAA |
| Undersized | Under 200m | Slowest; tightest turns |
What is a non-banked track?
A non-banked, or flat, track is a 200m indoor track whose turns are level with the straights. Every stride through a flat turn costs speed that a banked turn gives back, which is why the same athlete runs measurably slower indoors on a flat track, and why a flat-track time is not directly comparable with a banked-track time.
The part that matters for rankings: conversion
The NCAA acknowledges the difference and publishes exact factors and uses them on its qualifying lists. A men's flat-track mile is multiplied by 0.9874 to get its banked-track equivalent, so a 4:20.00 on a flat track counts as a 4:16.72. The correction is largest in the 200m and shrinks as the race gets longer, and the men's factors are slightly larger than the women's at every distance.
You can run your own time through the official chart with the NCAA flat track conversion calculator, which carries the full published table for both genders, 200m through 5000m and the relays.
How the indoor event list differs
Indoor meets replace the 100m with a 55m or 60m dash, the 110m/100m hurdles with 55m or 60m hurdles, and drop the long hurdles, steeplechase, discus, hammer and javelin. The 200m and 400m survive but are run on the doubled-turn track, which is why their indoor times run slower than outdoor ones even on a banked facility; more on that in indoor vs outdoor track differences.
Why coaches care which track your time came from
A recruiter reading "4:20 mile, indoor" cannot judge it without knowing the facility. On a banked track it is what it says; on a flat track it is worth roughly three and a half seconds more. Put the facility type next to any indoor mark you report, or better, report the converted number and say so: the conversion is official, and using it is exactly what the NCAA's own lists do.