Times
The times typical at each age, where a time sits among them, and the national qualifying times.
* Swimmers are those who raced at a meet in Swimming New Zealand’s results; club members who did not race are not counted.
What times are typical at each age?
A typical girl’s best 50 Freestyle SC is 51.23 at 8 and under, 32.53 at 13 and 28.72 at 18 and over.
Best times in 2026 so far, in seconds. Typical is the median: half the swimmers of each age were faster, half slower. The band holds the middle half, from the 25th to the 75th percentile; faster times are higher up.
| Age | Swimmers | Fastest quarter | Typical (median) | Slowest quarter |
|---|---|---|---|---|
| 8 and under | 166 | under 45.34 | 51.23 | over 59.78 |
| 9 | 326 | under 40.77 | 45.46 | over 50.98 |
| 10 | 553 | under 38.18 | 41.78 | over 46.48 |
| 11 | 684 | under 35.27 | 38.38 | over 41.76 |
| 12 | 682 | under 32.50 | 34.96 | over 38.42 |
| 13 | 469 | under 30.57 | 32.53 | over 35.19 |
| 14 | 318 | under 29.73 | 31.16 | over 33.22 |
| 15 | 256 | under 29.08 | 30.30 | over 31.94 |
| 16 | 154 | under 28.66 | 29.72 | over 30.80 |
| 17 | 82 | under 27.89 | 28.98 | over 30.37 |
| 18 and over | 83 | under 26.74 | 28.72 | over 30.78 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · best times of girls at each age (one with a birthday in the period counts at both), ages with 30 or more of them · n = 3,773
Where does a time sit?
The age is on the day of the race. The event, pool, gender and years are chosen for this sheet and the chart above together.
Type a time to see how many of every 100 girls aged 13 it is faster than.
Convert a time between 25 m, 50 m and 25-yard pools
This only places a time among swimmers of the same age and gender. It says nothing about what comes next.
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · girls aged 13 who swam this event · n = 469
How much faster in a year?
The younger, the more a year takes off: a typical girl aged 8 and under swam the 50 Freestyle SC 7.3 s faster than in the same months of 2025, at 12 2.5 s, at 14 1.2 s, and from 16 less than half a second; half of the 12-year-old girls took off between 1.2 and 4.4 s.
Girls who swam the event in both years: the seconds their best this year took off their best of the same months a year before, at their age at this year’s best. The dot is the typical swimmer (the median), the bar the middle half; below zero, slower than a year before.
| Age | Swimmers | Typical | Middle half |
|---|---|---|---|
| 8 and under | 35 | 7.3 | 3.7 to 12.1 |
| 9 | 114 | 5.8 | 3.4 to 7.8 |
| 10 | 193 | 4.8 | 2.4 to 8.1 |
| 11 | 344 | 4.0 | 2.4 to 6.1 |
| 12 | 375 | 2.5 | 1.2 to 4.4 |
| 13 | 313 | 1.6 | 0.7 to 2.8 |
| 14 | 213 | 1.2 | 0.4 to 1.9 |
| 15 | 177 | 0.6 | 0.1 to 1.2 |
| 16 | 114 | 0.3 | −0.1 to 0.8 |
| 17 | 56 | 0.1 | −0.3 to 0.6 |
| 18 and over | 66 | 0.0 | −0.4 to 0.4 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · n = 2,000 girls
How much slower is a 50 m pool?
A 100 freestyle was typically 2.3% slower in a 50 m pool than the same swimmer’s best in a 25 m pool within 45 days - about 1.6 s on a typical 1:10.06 swim in a 25 m pool; the most, 4.4%, in the 200 breaststroke.
Swimmers who swam an event in both pools within 45 days in 2026 so far: how much slower their race in a 50 m pool was than their best in a 25 m pool, typical (the median). What these swimmers did, not a rule for converting a time.
| Event | Slower | Swimmers |
|---|---|---|
| 50 Freestyle | 2.4% | 1,498 |
| 100 Freestyle | 2.3% | 1,079 |
| 200 Freestyle | 3.6% | 545 |
| 400 Freestyle | 3.4% | 213 |
| 800 Freestyle | 3.4% | 42 |
| 1500 Freestyle | 2.5% | 31 |
| 50 Backstroke | 3.0% | 999 |
| 100 Backstroke | 3.7% | 641 |
| 200 Backstroke | 4.3% | 270 |
| 50 Breaststroke | 3.4% | 947 |
| 100 Breaststroke | 4.2% | 614 |
| 200 Breaststroke | 4.4% | 268 |
| 50 Butterfly | 1.9% | 963 |
| 100 Butterfly | 2.6% | 338 |
| 200 Butterfly | 3.9% | 59 |
| 200 Individual Medley | 3.2% | 476 |
| 400 Individual Medley | 3.6% | 67 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · n = 9,050 swimmers and events
When do boys pull ahead?
At 12, a typical boy’s 50 Freestyle SC is 2% faster than a typical girl’s; at 16, 12% faster; the gap grows most between 12 and 13. Yet they overlap: at 12, 44 in 100 girls swim faster than the typical boy; at 14, 13 in 100; from 16, fewer than 5 in 100.
Typical (median) best time at each age, girls and boys; faster is higher. “Faster than” compares speeds: the girls’ time over the boys’.
| Age | Girls | Boys | Boys faster |
|---|---|---|---|
| 8 and under | 51.23 | 48.60 | 5.4% |
| 9 | 45.46 | 44.12 | 3.0% |
| 10 | 41.78 | 41.50 | 0.7% |
| 11 | 38.38 | 37.77 | 1.6% |
| 12 | 34.96 | 34.35 | 1.8% |
| 13 | 32.53 | 30.93 | 5.2% |
| 14 | 31.16 | 28.94 | 7.7% |
| 15 | 30.30 | 27.41 | 10.5% |
| 16 | 29.72 | 26.44 | 12.4% |
| 17 | 28.98 | 25.95 | 11.7% |
| 18 and over | 28.72 | 25.31 | 13.5% |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · n = 6,893 swimmers
What time makes the top ten at each age?
The tenth fastest 12-year-old girl swam the 50 Freestyle SC in 29.24 in 2026 so far, 5.7 s under the typical 34.96; the tenth fastest boy, 28.69.
The best time of the tenth fastest swimmer at each age - every swimmer once, by their best, at their age on the day - with the typical time after it.
| Age | Girls: tenth · typical | Boys: tenth · typical |
|---|---|---|
| 8 and under | 41.53 · 51.23 | 40.06 · 48.60 |
| 9 | 35.77 · 45.46 | 35.09 · 44.12 |
| 10 | 33.01 · 41.78 | 33.12 · 41.50 |
| 11 | 30.86 · 38.38 | 31.05 · 37.77 |
| 12 | 29.24 · 34.96 | 28.69 · 34.35 |
| 13 | 28.06 · 32.53 | 26.77 · 30.93 |
| 14 | 27.75 · 31.16 | 25.38 · 28.94 |
| 15 | 27.03 · 30.30 | 24.47 · 27.41 |
| 16 | 27.39 · 29.72 | 24.08 · 26.44 |
| 17 | 27.51 · 28.98 | 23.93 · 25.95 |
| 18 and over | 26.08 · 28.72 | 22.36 · 25.31 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · every swimmer once, by their best
How have times changed since 2016?
Girls aged 12 swam the 50 Freestyle SC in a typical 34.96 in 2026, 0.02 s slower than in 2016; the fastest typical year was 2021, 33.98; the fastest swam 28.16.
Each swimmer’s best time in 1 Jan to 10 Nov of each year, at the age on the day of the race, in seconds. Typical is the median; the band holds the middle half; faster times are higher up.
50 Freestyle, SC, girls aged 12
| Year | Typical | Fastest | Swimmers |
|---|---|---|---|
| 2026 | 34.96 | 28.16 | 682 |
| 2025 | 35.03 | 28.31 | 674 |
| 2024 | 35.34 | 28.00 | 611 |
| 2023 | 35.34 | 27.53 | 640 |
| 2022 | 34.60 | 27.37 | 592 |
| 2021 | 33.98 | 27.59 | 537 |
| 2020 | 34.24 | 28.14 | 602 |
| 2019 | 34.24 | 27.58 | 705 |
| 2018 | 34.44 | 27.72 | 739 |
| 2017 | 34.59 | 28.25 | 704 |
| 2016 | 34.94 | 27.70 | 665 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov of every year 2016 to 2026
What are the national qualifying times?
The 2026 NZ Age Group Championships have a qualifying time in 17 events for girls aged 13, one for each pool.
Version 1 of 23 October 2025. The NZ Age Group Championships (NAGS) take ages on their first day of racing (8 April 2026) and have their own qualifying window: these are the times as published, not a list of who may enter. The multi-class times, set by sport class, are in Swimming New Zealand’s own table.
NZ Age Group: girls aged 13
| Event | SC | LC |
|---|---|---|
| 50 Freestyle | 29.04 | 29.89 |
| 100 Freestyle | 1:04.97 | 1:06.67 |
| 200 Freestyle | 2:22.83 | 2:26.23 |
| 400 Freestyle | 4:57.73 | 5:04.53 |
| 800 Freestyle | 10:22.84 | 10:36.44 |
| 1500 Freestyle | 20:01.12 | 20:26.62 |
| 50 Backstroke | 33.37 | 34.22 |
| 100 Backstroke | 1:12.95 | 1:14.65 |
| 200 Backstroke | 2:38.48 | 2:41.88 |
| 50 Breaststroke | 37.94 | 38.94 |
| 100 Breaststroke | 1:25.02 | 1:27.02 |
| 200 Breaststroke | 3:09.12 | 3:13.12 |
| 50 Butterfly | 31.32 | 32.02 |
| 100 Butterfly | 1:13.43 | 1:14.83 |
| 200 Butterfly | 2:52.53 | 2:55.33 |
| 200 Individual Medley | 2:41.51 | 2:44.91 |
| 400 Individual Medley | 5:52.66 | 5:59.46 |
Source: Swimming New Zealand, 2026 NZ Age Group Championships qualifying times, Version 1 of 23 October 2025
How many swim national qualifying times?
Nearly 1 in 3 swimmers aged 13 to 16 swam at least one race faster than the 2026 NZ Age Group qualifying time for their age; at 13, 1 in 6, at 16, 54 in 100.
Swimmers of each age, per 100, with a race faster than the qualifying time for their age, gender, event and pool.
| Age | Per 100 | Swimmers |
|---|---|---|
| 13 | 18 | 765 |
| 14 | 35 | 571 |
| 15 | 39 | 446 |
| 16 | 54 | 349 |
Source: Swimming New Zealand results, 1 Jan to 10 Nov 2026 · age at the last race · n = 2,131 swimmers aged 13 to 16