| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 365 | Luka JANEŽIČ |
SLO |
46.45 Q | |
| 2 | 1 | 6 | 202 | Óscar HUSILLOS |
ESP |
46.51 Q | |
| 3 | 1 | 1 | 339 | Jakub KRZEWINA |
POL |
46.57 Q | |
| 4 | 2 | 1 | 386 | Deon LENDORE |
TTO |
46.68 Q | |
| 5 | 1 | 5 | 401 | Aldrich BAILEY JR |
USA |
46.77 Q | |
| 6 | 2 | 6 | 173 | Pavel MASLÁK |
CZE |
46.80 Q | |
| 7 | 2 | 5 | 231 | Lee THOMPSON |
GBR |
46.81 Q | |
| 8 | 3 | 6 | 188 | Luguelín SANTOS |
DOM |
46.83 q | |
| 9 | 4 | 6 | 304 | Yousef KARAM |
KUW |
46.86 q | |
| 10 | 2 | 2 | 281 | Javon FRANCIS |
JAM |
46.87 Q | |
| 11 | 3 | 2 | 324 | Chidi OKEZIE |
NGR |
46.91 q | |
| 12 | 4 | 2 | 385 | Asa GUEVARA |
TTO |
46.92 q | |
| 13 | 3 | 1 | 197 | Lucas BÚA |
ESP |
46.96 q | |
| 14 | 3 | 5 | 172 | Patrik ŠORM |
CZE |
46.99 q | .981 |
| 15 | 1 | 4 | 407 | Michael CHERRY |
USA |
46.99 Q | .988 |
| 16 | 4 | 1 | 189 | Juander SANTOS |
DOM |
47.02 q | |
| 17 | 2 | 4 | 344 | Rafał Omelko |
POL |
47.13 Q | |
| 18 | 3 | 4 | 293 | Mikhail LITVIN |
KAZ |
47.16 q | |
| 19 | 4 | 4 | 393 | Vitaliy Butrym |
UKR |
47.45 | |
| 20 | 5 | 1 | 106 | Michael Anthony Rasmijn |
ARU |
49.20 NIR | .191 |
| 21 | 5 | 6 | 381 | Davron Atabaev |
TJK |
49.20 SB | .200 |
| 22 | 5 | 2 | 320 | Kelvin Delvin Ramírez |
NCA |
49.88 NIR | |
| 23 | 6 | 2 | 435 | Tikie Terry Mael |
VAN |
49.92 NIR | |
| 24 | 5 | 4 | 314 | Mohamed Naail |
MDV |
49.98 NIR | |
| 25 | 6 | 6 | 105 | Narek Ghukasyan |
ARM |
51.02 PB | |
| 3 | 356 | Abdalelah Haroun |
QAT |
DQ | |||
| 3 | 264 | Bralon TAPLIN |
GRN |
DQ | |||
| 5 | 165 | Nery Brenes |
CRC |
DQ | |||
| 3 | 305 | Austris Karpinskis |
LAT |
DQ | |||
| 3 | 114 | Alonzo RUSSELL |
BAH |
DQ | |||
| 3 | 282 | Steven Gayle |
JAM |
DQ | |||
| 5 | 301 | Mazen Mawtan AL YASEN |
KSA |
DNS |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second