CONVERSION
FORMULAS
(Note: Results will be approximations! Conversions are rarely completely accurate due to differences between swimmers in their use of walls, onset of fatigue, confidence, etc. Depending on the swimmer, racing in a 25yard pool can be very different than racing in a 50meter pool. )
Short Course Yards to Long Course Meters
Stroke 
50's 
Butterfly 
(Meters Time) = (Yards Time) x 1.11 + 0.7 sec 
Backstroke 
(Meters Time) = (Yards Time) x 1.11 + 0.6 sec 
Breaststroke 
(Meters Time) = (Yards Time) x 1.11 + 1.0 sec 
Freestyle 
(Meters Time) = (Yards Time) x 1.11 + 0.8 sec 
Stroke 
100's 
Butterfly 
(Meters Time) = (Yards Time) x 1.11 + 1.4 sec 
Backstroke 
(Meters Time) = (Yards Time) x 1.11 + 1.2 sec 
Breaststroke 
(Meters Time) = (Yards Time) x 1.11 + 2.0 sec 
Freestyle 
(Meters Time) = (Yards Time) x 1.11 + 1.6 sec 
Stroke 
200's 
Butterfly 
(Meters Time) = (Yards Time) x 1.11 + 2.8 sec 
Backstroke 
(Meters Time) = (Yards Time) x 1.11 + 2.4 sec 
Breaststroke 
(Meters Time) = (Yards Time) x 1.11 + 4.0 sec 
Freestyle 
(Meters Time) = (Yards Time) x 1.11 + 3.2 sec 
Ind. Medley 
(Meters Time) = (Yards Time) x 1.11 + 3.2 sec 
Stroke 
400's 
Ind. Medley 
(Meters Time) = (Yards Time) x 1.11 + 6.4 sec 
(Short Course Yards to Short Course Meter: Multiply by 1.11)
Long Course Meters to Short Course Yards
Stroke 
50's 
Butterfly 
(Yards Time) = (Meters Time  0.7 Sec) / 1.11 
Backstroke 
(Yards Time) = (Meters Time  0.6 Sec) / 1.11 
Breaststroke 
(Yards Time) = (Meters Time  1.0 Sec) / 1.11 
Freestyle 
(Yards Time) = (Meters Time  0.8 Sec) / 1.11 
Stroke 
100's 
Butterfly 
(Yards Time) = (Meters Time  1.4 Sec) / 1.11 
Backstroke 
(Yards Time) = (Meters Time  1.2 Sec) / 1.11 
Breaststroke 
(Yards Time) = (Meters Time  2.0 Sec) / 1.11 
Freestyle 
(Yards Time) = (Meters Time  1.6 Sec) / 1.11 
Stroke 
200's 

Butterfly 
(Yards Time) = (Meters Time  2.8 Sec) / 1.11 

Backstroke 
(Yards Time) = (Meters Time  2.4 Sec) / 1.11 

Breaststroke 
(Yards Time) = (Meters Time  4.0 Sec) / 1.11 

Freestyle 
(Yards Time) = (Meters Time  3.2 Sec) / 1.11 

Ind. Medley 
(Yards Time) = (Meters Time  3.2 Sec) / 1.11 

Stroke 
400's 

Ind. Medley 
(Yards Time) = (Meters Time  6.4 Sec) / 1.11 

(Long Course Meters to Short Course Meters: Just subtract seconds)
Conversion For Distance Events
400/800 meters (long course) converts to 500/1000 yards by dividing meter time by .8925.
1500 meters (long course) converts to 1650 yards by dividing meter time by 1.02.
500/1000 yards converts to 400/800 meters (long course) by multiplying by .8925.
1650 yards converts to 1500 meters (long course) by multiplying by 1.02.
To convert Long Course Meters to Short Course Meters use the following formulas for distance events:
400 freestyle: long course time  6.4 seconds = short course meters time.
800 freestyle: long course time  12.8 seconds = short course meters time.
1500 freestyle: long course time  24.0 seconds = short course meters time.