| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 1436 | Machel CEDENIO |
TTO |
45.90 Q |
| 2 | 1 | 1 | 1525 | Tyler Brown |
USA |
45.97 Q |
| 3 | 2 | 1 | 981 | Alexander Lerionka Sampao |
KEN |
46.21 Q |
| 4 | 1 | 2 | 921 | Nobuya Kato |
JPN |
46.26 Q |
| 5 | 2 | 2 | 301 | Abbas Abubakar ABBAS |
BRN |
46.28 Q |
| 6 | 3 | 2 | 644 | Jack Crosby |
GBR |
46.35 q PB |
| 7 | 2 | 3 | 1526 | Lamar Bruton-Grinnage |
USA |
46.67 Q |
| 8 | 3 | 1 | 922 | Kaisei Yui |
JPN |
46.68 q PB |
| 9 | 3 | 3 | 1260 | Berend KOEKEMOER |
RSA |
46.87 |
| 10 | 4 | 1 | 652 | Elliot Rutter |
GBR |
46.93 |
| 11 | 4 | 3 | 132 | Sam Reiser |
AUS |
47.02 |
| 12 | 4 | 2 | 1327 | Luka JANEŽIČ |
SLO |
47.06 PB |
| 13 | 5 | 2 | 1323 | Warren Hazel |
SKN |
47.22 |
| 14 | 5 | 1 | 1502 | Oleksiy Pozdnyakov |
UKR |
47.43 |
| 15 | 6 | 1 | 1462 | Batuhan ALTINTAÅž |
TUR |
47.46 |
| 16 | 5 | 3 | 879 | Nathon ALLEN |
JAM |
47.56 |
| 17 | 6 | 3 | 482 | Juander SANTOS |
DOM |
47.64 |
| 18 | 7 | 1 | 129 | Joshua Robinson |
AUS |
47.72 |
| 19 | 7 | 3 | 209 | Henri Delauze |
BAH |
47.78 |
| 20 | 6 | 2 | 206 | Janeko Cartwright |
BAH |
47.88 |
| 21 | 8 | 3 | 319 | Joshua Cunningham |
CAN |
47.91 |
| 22 | 8 | 1 | 273 | Karabo SIBANDA |
BOT |
48.30 |
| 23 | 7 | 2 | 884 | Martin Manley |
JAM |
48.38 |
| 2 | 359 | Jamal Walton |
CAY |
DNF |