Swim tracking guide
Short course conversions and qualifying times
A swimmer has a strong 25m pool time but the target is set in a 50m pool. Can the short course time be used? Sometimes, through a conversion, but a converted time is an estimate, and the meet rules decide whether it counts.
Direct answer
A conversion estimates an equivalent time between a 25m pool and a 50m pool. Some meets accept converted times for entry and some do not, and a converted time should always be labelled as context rather than treated as the raw achieved swim.
What a conversion is
A conversion uses a method to estimate what a swim in one course might be worth in the other. It accounts for the fact that a 25m pool has more turns than a 50m pool over the same distance.
The result is an estimate, not a swim that actually happened. That distinction matters, because a converted time is a calculated figure layered on top of a real result.
When converted times are accepted
Some meets accept conversions for entry, often with clear labelling, while others only accept times swum in the required course. There is no single national rule, so the meet conditions decide.
Even where a conversion is accepted for entry, the swimmer still has to race in the meet's course. A converted entry time does not change the pool they will swim in on the day.
Keep raw and converted separate
Record the achieved swim as the real result, in its actual course. If you note a converted figure, label it clearly as converted context so it never gets mistaken for a genuine PB.
This keeps a swimmer's history honest. A 25m pool PB and a converted long course estimate are two different things, and merging them hides what actually happened.
How PB Pathway treats conversions
PB Pathway keeps short course and long course results separate by design, so each PB stays tied to the course it was swum in. Any converted or calculated figure should be shown as context only, where permitted data is available.
PB Pathway does not decide whether a converted time is accepted for a particular meet. Always check the official conditions for that competition before relying on a conversion.
FAQ
What is a short course conversion?
It is an estimate of what a 25m pool swim might be worth in a 50m pool, or the reverse, accounting for the different number of turns.
Can I use a converted time to qualify?
Only if the meet accepts conversions. Some do, some only accept times swum in the required course. Check the meet conditions.
Is a converted time a PB?
No. A converted time is a calculated estimate. The PB is the actual time swum in a given course.
Why keep short course and long course separate?
Because they are different racing contexts. Mixing them, or treating a conversion as a real swim, makes progress harder to read.
Does PB Pathway convert times automatically?
PB Pathway keeps courses separate and treats any converted figure as context where permitted data is available. It does not decide meet eligibility.
Related resources
What is short course swimming? Short course vs long course times
Understand short course swimming, long course swimming, 25m pools, 50m pools and why short course and long course PBs should be tracked separately.
Why your PB might not count for a qualifying time
Common reasons a swimming PB does not count toward a qualifying time: wrong course, outside the window, hand-timed swims, conversions and licence levels.
Swimming qualifying times: County, Regional and National explained
A UK guide to swimming qualifying times across County, Regional and National pathways, including course, age group, season window and consideration times.
How to compare swimming times properly
How to compare swimming times fairly: match event and course, mind age group and conditions, and avoid the apples-to-oranges traps that mislead families.
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