How does a swimmer get from the heats to the final?
B · Beginner · The race · 5 of 5Swimmers qualify on time, not on where they finish in their own heat. The fastest go through from the heats to the semi-finals, and the fastest eight from the semi-finals go to the final. The last three heats are seeded so that the quickest entrants are spread across them. If there is only one heat, it is swum as the final.
How it works
- Entry times: each athlete submits their fastest time in the event. An athlete with no time is ranked last.
- One heat: "the race will be seeded as a final and swum as a direct final".
- Two heats: the fastest swimmer goes in the second heat and the second fastest in the first, alternating down the list.
- Three heats: the fastest goes in the third heat, the second fastest in the second and the third fastest in the first, alternating down the list. The 400 m, 800 m and 1500 m are excepted.
- Four or more: the last three heats are seeded that way. Earlier heats are filled with the next fastest swimmers in order.
- 400 m, 800 m and 1500 m: only the last two heats are seeded by alternating.
- At least three: a heat is seeded with at least three swimmers, though withdrawals may leave fewer.
- Semi-finals: seeded on the times from the heats, with the fastest swimmer in the second semi-final and the second fastest in the first.
- The final: "the fastest eight (8) Athletes will qualify for the final", on the times from the semi-finals.
- A withdrawal: the place goes to the fastest swimmer who had not qualified, if that is reasonably possible.
- Relays: teams are seeded in the same way.
A heat is a preliminary race. The later rounds are the semi-final and final, and a race with no heats is a direct final. Heats arranged this way are seeded heats.
Tricky cases
A swimmer wins their heat. Are they through?
No, not for that reason. Qualification is on time across all the heats.
Only six swimmers enter an event. Are there heats?
No. With enough swimmers for only one heat, it is swum as a direct final.
A finalist withdraws. Is their lane left empty?
It depends on timing. The place is given to the fastest swimmer who had not qualified, if the management committee finds it reasonably possible.
Is every event swum with heats, semi-finals and a final?
No. At the 25 m and junior world championships, events of 200 m and more have heats and finals only.
Why the rule exists
Qualifying on time means a swimmer in a fast heat is not knocked out by finishing fourth in it while a slower swimmer wins another. Spreading the fastest entrants over the last three heats means each of them has rivals to race and none of those heats is a procession.
Where it differs
| Where | What changes | Source |
|---|---|---|
| World Aquatics rules | As above | SW 3.2 to 3.4 |
| World Championships (25 m) and junior championships | Semi-finals only in the 50 m and 100 m events | SW 3.7 |
| 800 m and 1500 m freestyle | May be swum as timed finals, with the fastest heat in the finals session | SW 3.7.3 |
| Other competitions | A draw may be used to give out lanes | SW 3.6 |
From the rule book
World Aquatics, Competition Regulations, Part Two: Swimming Rules (in force as from February 2026), Articles 3.1 to 3.4, 3.6 and 3.7. Checked 14 October 2026. Official document: World Aquatics Competition Regulations (PDF).