swimCharlotte Kooistra
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 36.45 | +1.06s to B·+11.16s to Sectionals | 2026-02-07 | 2026 Grand Rapids Openvenue |
| 100 Freestyle | SCY | 1:24.64 | +6.95s to B·+30.15s to Sectionals | 2026-02-08 | 2026 Grand Rapids Openvenue |
| 200 Freestyle | SCY | 3:03.52 | +14.43s to B·+65.63s to Sectionals | 2026-02-14 | 2026 WMSL Winter "A" Championshipvenue |
| 50 Backstroke | SCY | 46.80 | +6.21s to B·+19.51s to Sectionals | 2026-06-06 | 2026 Zeeland Summer Classicvenue |
| 100 Backstroke | SCY | 1:38.40 | +7.71s to B·+37.91s to Sectionals | 2025-11-16 | 2025 GR Gales of November Open Invitationalvenue |
| 50 Breaststroke | SCY | 1:00.98 | +15.49s to B·+30.29s to Sectionals | 2026-01-10 | 2026 Zeeland Winter Classicvenue |
| 100 Breaststroke | SCY | 2:10.26 | +29.97s to B·+60.77s to Sectionals | 2025-11-15 | 2025 GR Gales of November Open Invitationalvenue |
| 50 Butterfly | SCY | 45.83 | +6.94s to B·+19.14s to Sectionals | 2026-02-14 | 2026 WMSL Winter "A" Championshipvenue |
| 100 Butterfly | SCY | 1:46.89 | +16.10s to B·+47.30s to Sectionals | 2026-02-07 | 2026 Grand Rapids Openvenue |
| 100 Individual Medley | SCY | 1:44.30 | +15.61s to B | 2026-06-06 | 2026 Zeeland Summer Classicvenue |
| 200 Individual Medley | SCY | 3:32.83 | +20.04s to B·+79.84s to Sectionals | 2025-11-02 | Greater Kalamazoo Arena Challengevenue |
| 50 Freestyle | SCM | 43.10 | +4.01s to B | 2026-05-09 | 2026 WMS Spring Splash SCMvenue |
| 100 Freestyle | SCM | 1:35.59 | +9.70s to B | 2026-05-09 | 2026 WMS Spring Splash SCMvenue |
| 50 Backstroke | SCM | 1:02.74 | +17.85s to B | 2024-05-11 | 2024 WMS Spring Splashslow pool |
| 50 Butterfly | SCM | 53.26 | +10.27s to B | 2026-05-09 | 2026 WMS Spring Splash SCMvenue |
| 100 Individual Medley | SCM | 1:49.73 | +11.74s to B | 2026-05-09 | 2026 WMS Spring Splash SCMvenue |
| 50 Freestyle | LCM | 42.41 | +2.02s to B·+13.62s to Sectionals | 2026-07-12 | 2026 West Michigan Classicfast pool |
| 100 Freestyle | LCM | 1:33.11 | +3.92s to B·+31.32s to Sectionals | 2025-07-12 | 2025 West Michigan Classicvenue |
| 200 Freestyle | LCM | 3:24.81 | +11.82s to B·+71.72s to Sectionals | 2025-06-14 | 2025 JAWS Sun & Funvenue |
| 50 Backstroke | LCM | 53.97 | +7.18s to B·+22.48s to Sectionals | 2026-07-11 | 2026 West Michigan Classicfast pool |
| 100 Backstroke | LCM | 1:54.07 | +8.28s to B·+43.58s to Sectionals | 2026-06-27 | 2026 JAWS Sun & Fun ABC Spectacular & IMXvenue |
| 50 Breaststroke | LCM | 1:10.42 | +18.13s to B·+34.83s to Sectionals | 2026-07-11 | 2026 West Michigan Classicfast pool |
| 50 Butterfly | LCM | 55.18 | +11.59s to B·+24.89s to Sectionals | 2026-06-21 | 2026 Summer Solstice Meetvenue |
| 100 Butterfly | LCM | 2:04.00 | +20.61s to B·+55.91s to Sectionals | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMXvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 11.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 32.15 | flying | 200 Free Relay (leg 4) | 2025-06-07 | 2025 Zeeland Summer Classic |
| 50 Freestyle | SCM | 45.01 | flying | 200 Free Relay (leg 3) | 2025-05-10 | 2025 WMS Spring Splash |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 11-12 · SCY
887 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BK SCY | 1:38.40 | 258 |
| 100 BR SCY | 2:10.26 | 165 |
| 100 FL SCY | 1:46.89 | 193 |
| 200 IM SCY | 3:32.83 | 271 |
| 500 FR SCY | — | 0 |
IMR 11-12 · SCY
1139 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 3:03.52 | 292 |
| 50 BK SCY | 46.80 | 240 |
| 50 BR SCY | 1:00.98 | 158 |
| 50 FL SCY | 45.83 | 220 |
| 100 IM SCY | 1:44.30 | 229 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:24.64
Front half 40.86s · back half 43.78s
200 Freestyle SCY 3:03.52
Front half 91.63s · back half 91.89s
100 Backstroke SCY 1:38.40 RT 0.89s
Front half 49.38s · back half 49.02s
100 Breaststroke SCY 2:10.26 RT 1.69s
Front half 63.27s · back half 66.99s
100 Butterfly SCY 1:46.89
Front half 49.16s · back half 57.73s
100 Individual Medley SCY 1:44.30
Front half 49.34s · back half 54.96s
200 Individual Medley SCY 3:32.83
Front half 100.84s · back half 111.99s
100 Freestyle SCM 1:35.59
Front half 47.25s · back half 48.34s
100 Individual Medley SCM 1:49.73
Front half 50.85s · back half 58.88s
100 Freestyle LCM 1:33.11
Front half 45.55s · back half 47.56s
200 Freestyle LCM 3:24.81
Front half 99.99s · back half 104.82s
100 Backstroke LCM 1:54.07
Front half 58.07s · back half 56.00s
100 Butterfly LCM 2:04.00
Front half 58.17s · back half 65.83s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.