How do you calculate swim pace per 100?

Divide your total time in seconds by your distance and multiply by 100. 1000 m in 18:20 is 1100 seconds; 1100 ÷ 1000 × 100 = 110 seconds, so 1:50 per 100 m. The page does the same for yards when you switch the units.

What is a good swim pace per 100 m?

There is no single answer — it depends on your level, the stroke, the pool length and how far you are swimming, and a pace that is easy for a club swimmer is a sprint for a beginner. The useful comparison is your own earlier swims over the same distance in the same pool: the page turns each one into a per-100 figure so they line up.

How do I convert a 100 yd time to 100 m?

Divide by 0.9144 — a yard is 0.9144 m, so 100 yd is 91.44 m and the same pace over 100 m takes about 9% longer. 1:30 per 100 yd is 1:38 per 100 m. The page shows the pace in both units for whichever you enter.

How long is a swimming mile?

In US yards pools the 'mile' event is 1650 yd (1,508.8 m), and in metres pools it is the 1500 m; a true mile is 1,609 m, which open-water events sometimes use. The projection table lists the 1650 and the 1500 at your pace.

How do I convert a yards pace to a metres pace?

Divide by 0.9144: 1:45 per 100 yd is 1:55 per 100 m.

Swim Pace Calculator (per 100 m or 100 yd, with Race Time Projections)

Pace per 100 m or 100 yd from any swim, with per-50 and per-25 splits and the same pace over race distances.

Inputs

Distance(m)

25 m10,000 m

Minutes

0300

Seconds

059

Units

Include CalculateEveryday mark

Pace per 100 m

1:38

The same pace held over standard distances

Distance	Time at this pace
50 m	0:49
100 m	1:38
200 m	3:15
400 m	6:30
800 m	13:00
1500 m	24:23
3800 m (Ironman)	1:01:45

Working: 6:30 ÷ 400 m × 100 = 97.5 s per 100 m
Per 100 yd: 1:29
Per 50 and per 25: 0:49 / 0:24
Speed: 1.03 m/s (3.69 km/h)
Total time: 6m 30s

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What each Swim Pace input means

Distance: The distance swum, in metres or yards — the pool's unit. A 25 m pool and a 25 yd pool are not the same.
Minutes: The minutes in your time.
Seconds: The seconds in your time.
Units: Metres or yards; the other unit's pace is shown as well.

Swim Pace formula

pace per 100 = time ÷ distance × 100 · time for a distance = pace per 100 ÷ 100 × distance · per 100 yd = per 100 m × 0.9144

p_{100} = \frac{t}{d} \times 100

Swimmers talk in pace per 100 — metres in most of the world, yards in US pools — so the page divides your time by your distance and scales to 100. That single number then answers the practical questions: what the pace looks like per 50 and per 25 for a set of repeats, what it converts to in the other pool unit, and what time it would give held over the standard distances — 50, 100, 200, 400, 800, 1500 m or the 1650-yard mile. A yard is exactly 0.9144 m, so a 100-yard pace is about 9% faster on the clock than the same swimmer's 100-metre pace; comparing times from a yards pool with times from a metres pool without converting is the commonest mistake in the sport.

Swim Pace worked example

400 m in 6:30 is 390 seconds; 390 ÷ 400 × 100 = 97.5 seconds, or 1:38 per 100 m. That is 0:49 per 50 and 0:24 per 25, and 1.03 m/s. Held for 1500 m it gives 24:23, and for the 800 it gives 13:00. In a yards pool the same speed is 1:29 per 100 yd.

More Swim Pace examples

1,500 m in 30:00: 1,800 s ÷ 15 = 2:00 per 100 m, which is 1:50 per 100 yd.

500 yd in 8:45 in a short-course yards pool: 525 s ÷ 5 = 1:45 per 100 yd, about 1:55 per 100 m.

Where the Swim Pace calculator can give the wrong answer

Pool length matters more than people think. Times from a 25 m pool are faster than from a 50 m pool for the same swimmer because of the extra turns, and yards pools are shorter again; the page converts units, not pool effects.
A pace from a short swim does not hold over a long one. Projecting a 100 m sprint time onto 1500 m gives a target nobody can swim; use a swim of similar length to the distance you are planning.
Open water has no walls to push off and often a current, so a 1:38 pool pace becomes something slower in a lake. The 3800 m Ironman row is the pool-pace equivalent, not a prediction.
Seconds are entered 0–59 alongside minutes. A time like 1:75 has to be typed as 2:15.
Speed in km/h is shown for comparison with running and cycling; swimmers rarely use it.

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Swim Pace reference table

Swim times at an even pace per 100 m
Per 100 m	400 m	750 m	1,500 m	Per 100 yd
1:30	6:00	11:15	22:30	1:22
1:45	7:00	13:08	26:15	1:36
2:00	8:00	15:00	30:00	1:50
2:15	9:00	16:52	33:45	2:03
2:30	10:00	18:45	37:30	2:17

Source: Arithmetic: pace × distance ÷ 100; 100 yd = 91.44 m

Swim Pace FAQ

: Divide your total time in seconds by your distance and multiply by 100. 1000 m in 18:20 is 1100 seconds; 1100 ÷ 1000 × 100 = 110 seconds, so 1:50 per 100 m. The page does the same for yards when you switch the units.
: There is no single answer — it depends on your level, the stroke, the pool length and how far you are swimming, and a pace that is easy for a club swimmer is a sprint for a beginner. The useful comparison is your own earlier swims over the same distance in the same pool: the page turns each one into a per-100 figure so they line up.
: Divide by 0.9144 — a yard is 0.9144 m, so 100 yd is 91.44 m and the same pace over 100 m takes about 9% longer. 1:30 per 100 yd is 1:38 per 100 m. The page shows the pace in both units for whichever you enter.
: In US yards pools the 'mile' event is 1650 yd (1,508.8 m), and in metres pools it is the 1500 m; a true mile is 1,609 m, which open-water events sometimes use. The projection table lists the 1650 and the 1500 at your pace.
: Divide by 0.9144: 1:45 per 100 yd is 1:55 per 100 m.