| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 457 | Solomon Lekuta |
KEN |
1:48.19 Q | |
| 2 | 2 | 3 | 204 | Marino BLOUDEK |
CRO |
1:48.54 Q | |
| 3 | 3 | 3 | 307 | Markhim Lonsdale |
GBR |
1:48.60 Q SB | .597 |
| 4 | 4 | 3 | 262 | Adisu GIRMA |
ETH |
1:48.60 q | .600 |
| 5 | 1 | 1 | 646 | Josh HOEY |
USA |
1:48.86 Q | |
| 6 | 2 | 1 | 153 | Eliott CRESTAN |
BEL |
1:48.92 Q | |
| 7 | 1 | 4 | 454 | Alex Ngeno KIPNGETICH |
KEN |
1:49.03 Q | .026 |
| 8 | 3 | 1 | 205 | Sven Cepuš |
CRO |
1:49.03 Q SB | .030 |
| 9 | 4 | 1 | 203 | Juan Diego Castro |
CRC |
1:49.18 q NU20R | |
| 10 | 5 | 3 | 155 | Pieter SISK |
BEL |
1:49.40 q | .392 |
| 11 | 6 | 3 | 102 | Oussama Cherrad |
ALG |
1:49.40 q PB | .395 |
| 12 | 2 | 4 | 534 | Marcelo Pereira |
POR |
1:49.49 Q PB | |
| 13 | 3 | 4 | 656 | Rey Rivera |
USA |
1:49.53 Q | |
| 14 | 4 | 4 | 246 | Eduardo Romero |
ESP |
1:49.56 | |
| 15 | 5 | 1 | 377 | Beant Singh |
IND |
1:49.66 | |
| 16 | 1 | 2 | 393 | Simone BARONTINI |
ITA |
1:49.73 Q | |
| 17 | 6 | 1 | 484 | Mohamed Abouettahery |
MAR |
1:50.15 | |
| 18 | 7 | 3 | 119 | Lachlan Raper |
AUS |
1:50.23 | |
| 19 | 2 | 2 | 293 | Alex Botterill |
GBR |
1:50.26 Q | |
| 20 | 5 | 4 | 399 | Andrea Romani |
ITA |
1:50.28 | |
| 21 | 6 | 4 | 515 | Marco Vilca |
PER |
1:50.47 | |
| 22 | 3 | 2 | 607 | Mehmet ÇELİK |
TUR |
1:50.61 Q | |
| 23 | 4 | 2 | 415 | Kimar Farquharson |
JAM |
1:50.76 | |
| 24 | 7 | 1 | 132 | Archie Wallis |
AUS |
1:51.25 | |
| 25 | 5 | 2 | 183 | Ruach Chuol Padhal |
CAN |
1:51.61 | |
| 26 | 6 | 2 | 361 | Lőrinc Varga |
HUN |
1:51.67 | |
| 27 | 8 | 1 | 331 | Oskar SCHWARZER |
GER |
1:52.39 | |
| 28 | 7 | 4 | 489 | Charaf Zahir |
MAR |
1:52.95 | |
| 2 | 260 | Teddese LEMI |
ETH |
DQ |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second