A cotation isn't calculated from an equation a parent could run at home. It's read off a printed table: one row for every point value from 1 to 1500, one column for every event and gender. Swim a time, find the column for that event, and the row it falls in is the score. The FFN calls it exactly what it is — la table de cotation fédérale.
The table has three fixed reference points. One point requires no time at all, only finishing the race under the rules — the table's own "1" row is printed with the time columns left blank. 1,430 points was set to the weighted world average of the ten best performers of all time in that event, as FINA's own world rankings had it when the table was built. 1,500 points is a ceiling, a mark the very best swimmers in the world have historically reached in a 25 m pool. Everything else on the table sits between those markers.
For events that aren't part of the core international programme, the points weren't independently benchmarked the same way — they were extrapolated from the events that were. Worth knowing if a cotation for a less common event ever looks like an outlier.
Four points on the 100m freestyle column, as an example of what the scale actually spans | Cotation | Women's 100m freestyle, 50 m pool | Men's 100m freestyle, 50 m pool |
| 1500 the ceiling | 49.59 | 43.53 |
| 1430 the 2016 world top-10 average | 51.34 | 45.35 |
| 2 the slowest time that scores | 2:01.60 | 1:58.55 |
| 1 no time required at all | Any time — just finish the race | Any time — just finish the race |
These numbers are ten years old at the benchmark end — see the next section.