| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 3086 | Karsten WARHOLM |
NOR |
47.30 Q | |
| 2 | 1 | 2 | 1318 | Alison DOS SANTOS |
BRA |
47.31 Q AR | |
| 3 | 2 | 1 | 3907 | Rai BENJAMIN |
USA |
47.37 Q | |
| 4 | 2 | 2 | 3295 | Abderrahman Almoubarrake S ALSALECK |
QAT |
47.47 Q SB | |
| 5 | 3 | 1 | 3668 | Yasmani COPELLO |
TUR |
47.88 q SB | |
| 6 | 3 | 2 | 2439 | Alessandro SIBILIO |
ITA |
47.93 q PB | |
| 7 | 4 | 1 | 2341 | Thomas BARR |
IRL |
48.26 SB | .255 |
| 8 | 1 | 3 | 2456 | Kyron MCMASTER |
IVB |
48.26 Q | .258 |
| 9 | 2 | 3 | 1824 | Rasmus MÄGI |
EST |
48.36 Q NR | |
| 10 | 4 | 2 | 3968 | Kenneth SELMON |
USA |
48.58 | |
| 11 | 5 | 2 | 2154 | Luke CAMPBELL |
GER |
48.62 PB | |
| 12 | 3 | 3 | 3939 | David KENDZIERA |
USA |
48.67 | |
| 13 | 6 | 2 | 2626 | Shawn ROWE |
JAM |
48.83 PB | |
| 14 | 5 | 1 | 2611 | Kemar MOWATT |
JAM |
48.95 | |
| 15 | 6 | 1 | 3444 | Sokwakhana ZAZINI |
RSA |
48.99 SB | |
| 16 | 7 | 1 | 1979 | Ludvy VAILLANT |
FRA |
49.02 SB | |
| 17 | 4 | 3 | 2172 | Constantin PREIS |
GER |
49.10 | |
| 18 | 5 | 3 | 1008 | Abdelmalik LAHOULOU |
ALG |
49.14 | |
| 19 | 7 | 2 | 3026 | Nick SMIDT |
NED |
49.35 SB | .348 |
| 20 | 6 | 3 | 2724 | Hiromu YAMAUCHI |
JPN |
49.35 | .350 |
| 21 | 7 | 3 | 1958 | Wilfried HAPPIO |
FRA |
49.49 | |
| 22 | 8 | 2 | 1637 | VÃt MÜLLER |
CZE |
49.69 | |
| 23 | 8 | 1 | 2145 | Joshua ABUAKU |
GER |
49.93 | |
| 24 | 8 | 3 | 2592 | Jaheel HYDE |
JAM |
1:27.38 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second