1600m runners can cut their time in half to start to estimate their 800m time but what about sprinters? You can't just double yout 400m?
Sprinters can use their fastest 400m to determine their (likley) best 800m. See below.
400m 800m
0:52-2:00
0:56-2:09
1:00-2:19
1:01-2:21
1:02-2:24
1:03-2:26
1:04-2:28
1:05-2:30
1:06-2:33
1:07-2:35
1:08-2:37
1:09-2:40
1:10-2:42
1:11-2:44
1:12-2:47
1:13-2:48
1:14-2:51
1:15-2:54
1:16-2:56
1:17-2:58
1:18-3:00
Sprinters can use their fastest 400m to determine their (likley) best 800m. See below.
400m 800m
0:52-2:00
0:56-2:09
1:00-2:19
1:01-2:21
1:02-2:24
1:03-2:26
1:04-2:28
1:05-2:30
1:06-2:33
1:07-2:35
1:08-2:37
1:09-2:40
1:10-2:42
1:11-2:44
1:12-2:47
1:13-2:48
1:14-2:51
1:15-2:54
1:16-2:56
1:17-2:58
1:18-3:00