NOTE: This procedure is suggested for seeding purposes ONLY, and should not be considered accurate for converting records from English to metric, or vice-versa.
100 yards to 100 meters add .9 sec.
120 yard HH to 110-meter HH time is the same
220 yards to 200 meters subtract .1 sec.
440 yards to 400 meters subtract .3 sec.
440-yard relay to 4x100-meter relay subtract .2 sec.
880 yards to 800 meters subtract .7 sec.
880-yard relay to 4x200-meter relay subtract .5 sec.
880-yard medley to 800-meter medley relay subtract .5 sec.
mile medley relay to 1600-meter medley relay subtract 1.2 sec.
mile relay to 4x400-meter relay subtract 1.1 sec.
two-mile relay to 4x800-meter relay subtract 2.8 sec.
mile run to 1600-meter run subtract 1.6 sec.
two-mile run to 3200-meter run subtract 3.4 sec.
110-yard LH to girls 100-meter LH subtract .1 sec.
220-yard LH to girls 200-meter LH subtract .2 sec.
330-yard LH to girls 300-meter LH subtract .2 sec.
330-yard LH to boys 300-meter LH subtract .2 sec.
330-yard IH to boys 300-meter IH subtract .2 sec.