Use this swim pace calculator to find your swimming pace per 100m (or per 100yd) from any distance and total time, or convert a known pace into finish times for triathlon and open water distances. Enter your swim time for 1500m, 1900m, or any distance, and the calculator instantly shows your pace per 100m, per 100yd, and speed in km/h or mph. Works for pool and open water swimming.
Unlike basic pace converters, this calculator automatically generates finish time predictions for all five standard triathlon swim distances (400m sprint to 3800m Ironman), so you can see exactly what your pool pace means for race day.
How do you calculate swimming pace? Divide your total swim time by the distance in hundreds of metres. Example: 30 minutes for 1500m = 30 ÷ 15 = 2:00 per 100m, which is 1:50 per 100yd. A recreational swimmer who trains is typically 1:45 to 2:15/100m, a competitive age grouper 1:25 to 1:45/100m, and an elite swimmer under 1:25/100m. Those bands are this site's ladder, not a published classification. This calculator converts between pace per 100m, per 100yd, and speed in km/h, and instantly shows predicted finish times for triathlon distances (400m to Ironman 3800m).
:min : sec
1:45
per 100m
1:36
per 100yd
3.43 km/h
Speed
Triathlon finish times
Distance
Finish time
400m (sprint)
7:00
750m (sprint)
13:08
1500m (Oly)
26:15
1900m (70.3)
33:15
3800m (Ironman)
1:06:30
:CSS / 100m
This calculator is for reference only. The pace is simple arithmetic from the time and distance you enter, and race day conditions are not in it.
The ability bands on this page, from Beginner through to Elite, are one ladder used everywhere on it and computed from a single table, but they are not a published classification. No federation groups swimmers by pace per 100 m. They are the figures coaches and swim schools repeat, written down here so the page cannot contradict itself, and the speed column beside them is calculated rather than typed.Source for the swim legs of each race distance: the World Triathlon age group race pages and the Ironman race listings. Pace, speed and the metre to yard conversion are arithmetic and need no source. The ability bands further down the page are this site's convention.
Why pace, not speed?
Why swimming uses pace, not speed
In cycling and running, speed (km/h) is natural. In swimming, pace per 100m is the universal training metric. This is because pool lengths are fixed at 25m or 50m, and coaches program workouts by repeating set distances.
A pace of 1:45 /100m, which is 1:36 /100yd, is equivalent to 3.43 km/h. Most swimmers and coaches work exclusively in pace units, but triathletes often convert to speed for race planning and gear selection.
Novice: 2:15 to 3:00 per 100m (2:03 to 2:45 per 100yd, 2.0 to 2.7 km/h)
Intermediate: 1:45 to 2:15 per 100m (1:36 to 2:03 per 100yd, 2.7 to 3.4 km/h)
Advanced: 1:25 to 1:45 per 100m (1:18 to 1:36 per 100yd, 3.4 to 4.2 km/h)
Elite: under 1:25 per 100m (under 1:18 per 100yd, over 4.2 km/h)
Pool vs open water
Why open water is slower
Open water swimming without a wetsuit is typically 5 to 18 percent slower than pool swimming for the same effort, and a wetsuit cancels most of that. The main reasons are navigation (sighting adds distance), waves, current, and no push-off from walls.
Open water pace adjustment:
Calm conditions, wetsuit: pool pace - 5s (wetsuit adds buoyancy and speed)
Calm, no wetsuit: pool pace + 5 to 10s
Choppy water: pool pace + 10 to 20s
Drafting benefit: -5 to 8s per 100m (swimming behind another athlete)
For triathlon race planning, add 10s to your pool pace and use that as your open water estimate when no wetsuit is allowed.
Triathlon distances
Triathlon swim distance guide
Triathlon swim distances are standardised across race formats. Use your pool pace to estimate swim finish time, then add 5 to 15% for open water conditions.
Sprint: 400 to 750m. Typical time: 6 to 15 minutes.
Olympic: 1500m. Typical time: 18 to 35 minutes.
70.3 (Half-Ironman): 1900m. Typical time: 25 to 45 minutes.
Ironman: 3800m. Cut-off 2h 20min. Typical age group time: 55 to 90 minutes.
Wetsuit advantage: 12 seconds per 100m for a standard suit and 15 for a racing one, which is the figure the open water calculator on this site applies. Over an Ironman swim that is 8 to 10 minutes.
Swimming Pace Chart: Common Distances
A quick lookup of finish times for common triathlon and open water swim distances at typical paces. Use this swimming pace chart to estimate your 1500m swim time or longer-distance triathlon swim pace.
Distance
Beginner 2:30/100m
Intermediate 2:00/100m
Advanced 1:30/100m
Elite 1:15/100m
400m (sprint tri)
10:00
8:00
6:00
5:00
750m (sprint tri)
18:45
15:00
11:15
9:23
1000m
25:00
20:00
15:00
12:30
1500m (Olympic tri)
37:30
30:00
22:30
18:45
1900m (70.3)
47:30
38:00
28:30
23:45
2500m
1:02:30
50:00
37:30
31:15
3800m (Ironman)
1:35:00
1:16:00
57:00
47:30
Times are estimates for continuous swimming. Open water times without a wetsuit are typically 5 to 18 percent slower than pool times due to sighting, currents and drafting; a wetsuit cancels most of the difference. Use the calculator above for precise pace calculations.
What Is a Good Swim Pace?
A good swim pace depends on experience: beginners typically swim 2:15 to 3:00 per 100m, intermediate swimmers 1:45 to 2:15/100m, competitive age groupers 1:25 to 1:45/100m, and elite swimmers under 1:25/100m. Olympic finalists are faster again, but they are a separate population rather than the top of this ladder. Swimming pace per 100m is the standard benchmark across pool and open water training. The results card prints the same pace on both bases at once, per 100 m and per 100 yd; a yard time is the metric one multiplied by 0.9144, so 2:00 becomes 1:50. The table below groups typical paces by ability level so you can see where you fall.
Level
Pace per 100m
Speed (km/h)
Description
Beginner
3:00+
under 2.0
Learning technique, frequent stops
Novice
2:15 to 3:00
2.0 to 2.7
Can swim continuously, basic stroke
Intermediate
1:45 to 2:15
2.7 to 3.4
Comfortable 1500m, decent technique
Advanced
1:25 to 1:45
3.4 to 4.2
Competitive age-group, efficient stroke
Elite
under 1:25
over 4.2
Competitive swimmer, near-perfect form
How to Calculate Swimming Pace
Swimming pace = total time ÷ number of 100m segments. For example, a 1500m swim completed in 25:00 = 25 ÷ 15 = 1:40 per 100m, or 1:31 per 100yd. More precisely, swimming pace is expressed as time per 100 metres (or 100 yards). Divide total swim time in seconds by the distance in metres, then multiply by 100. Swimming 1500m in 30 minutes: (1800 ÷ 1500) × 100 = 120 seconds = 2:00 per 100m. This swim speed calculator does the conversion automatically for any distance. Switch to Time → Pace mode above and enter your distance and time. For full triathlon race planning including bike and run splits, see our triathlon finish time calculator.
Pool Pace vs Open Water Pace
Open water is slower than the pool at the same effort, and how much slower depends on whether you are in a wetsuit. Without one, expect 5 to 18 percent slower in ordinary conditions, so a 1:40/100m pool swimmer averages roughly 1:45 to 2:00/100m. With a standard wetsuit the buoyancy cancels most of it, leaving anywhere from 7 percent faster to 6 percent slower. Both figures come from the open water calculator on this site, which takes sighting, chop and current as well. In a pool you benefit from walls (push-offs every 25 or 50m), lane lines reducing waves, and consistent conditions. Open water adds sighting (lifting your head to navigate), currents, chop, and wetsuit effects. When training in a pool for an open water race, add 10 to 15% to your pool pace to estimate your open water swim pace. For race-specific conditions like temperature and current, our open water swim calculator handles the adjustments.
How to Improve Your Swim Pace
The fastest way to improve swim pace is better technique, not harder training: reducing drag through body position and stroke efficiency saves more time than extra fitness. Most recreational swimmers have 15 to 30 seconds per 100m available through technique alone, though not all at once: a structured three month block typically delivers 10 to 20 of them. Focus on:
Reducing drag: streamlined body position, head down, hips up.
Catch and pull: feel the water, don't slip through it.
Bilateral breathing: every 3 strokes builds symmetry.
Kick efficiency: small, fast kicks from the hip, not the knee.
CSS training: swim at your Critical Swim Speed pace for sustained sets.
Learn more about Critical Swim Speed and how to use it for structured training in our CSS calculator. Understanding your SWOLF score alongside pace helps identify stroke efficiency. Try our SWOLF calculator. After the swim, estimate your full race time with our triathlon split calculator.
Frequently asked questions
How do I calculate my swim pace per 100m from distance and time?
Divide your total time in seconds by distance in metres, then multiply by 100. Example: 1900m in 35 minutes = (2100 ÷ 1900) × 100 = 110.5 seconds = 1:50 per 100m. Use the Time → Pace mode in the calculator above for instant results: enter your distance and total time and the pace per 100m, per 100yd, and speed are computed automatically.
How do I calculate my swimming pace?
Swimming pace is the time it takes to swim 100 metres or 100 yards. To calculate it, divide your total swim time by the distance in 100m units. For example, if you swim 400m in 8 minutes, your pace is 2:00 per 100m. Most swimmers and coaches use pace per 100m as the standard unit because it scales easily to any distance.
What is a good swimming pace for a beginner?
A good swimming pace for a beginner is around 2:15 to 3:00 per 100m. Recreational adult swimmers who train regularly typically swim at 1:45 to 2:15 per 100m. Competitive age groupers are in the 1:25 to 1:45 range. Elite swimmers are under 1:25 per 100m. The most important metric for a beginner is consistency: maintaining the same pace throughout a session.
What is a good 1500m swim time?
For age-group triathletes, under 30 minutes (2:00/100m pace, or 1:50/100yd) is a solid 1500m swim time benchmark. Competitive swimmers target 20 to 25 minutes (1:20 to 1:40 per 100m). Beginners completing 1500m continuously is an achievement regardless of time. The 1500m is the Olympic triathlon swim distance, so it doubles as a useful training and race-readiness yardstick.
How do I convert swim pace from per 100m to per 100yd?
To convert pace per 100m to pace per 100yd, multiply the seconds by 0.9144 (since 1 yard = 0.9144 metres, yards are shorter so the pace is faster). For example, 2:00 per 100m = 120 seconds × 0.9144 = 109.7 seconds = 1:50 per 100yd. The calculator handles this conversion automatically.
How do I convert swim pace per 100 yards to per 100 metres?
Multiply your pace per 100 yards by 1.0936 to get pace per 100 metres. If you swim 1:30/100yd, your metric pace is approximately 1:38/100m. The calculator above handles this conversion automatically, and every result shows both per 100m and per 100yd.
Is 2 minutes per 100m a good swim pace?
2:00 per 100m, which is 1:50 per 100yd, is a solid recreational pace. It places you in the intermediate category: comfortably above beginner level but with room to improve toward competitive times. At this pace you would complete a 400m sprint triathlon swim in about 8 minutes, an Olympic 1500m swim in 30 minutes, and an Ironman 3800m swim in approximately 1:16. Many regular swimmers train at this pace or faster.
How does open water pace compare to pool pace?
How much slower open water is depends on the wetsuit, which is why figures for it vary so much. Without one, expect 5 to 18 percent slower in ordinary conditions, which is 5 to 18 seconds per 100m on a 1:40 pool pace due to sighting, water conditions, and no push-offs from walls. A wetsuit adds buoyancy that can offset most of this difference, making wetsuit open water pace comparable to pool pace for many swimmers.
What swimming pace do I need for an Ironman?
The Ironman swim cutoff is 2 hours 20 minutes for 3800m, which requires an Ironman swim pace of 3:41/100m, or 3:22/100yd, or faster. Most age-group athletes aim for under 1:30:00 (about 2:22/100m) to have a comfortable margin. At 2:00/100m your swim split is approximately 1:16; at 1:45/100m it is about 1:07. Elite professionals are faster again than the under 1:25 band on this page, which is where a strong age grouper sits.
How do I improve my swimming pace?
The fastest way to improve pace is better technique, not harder training. Most recreational swimmers drop 10 to 20 seconds per 100m within 3 months of structured technique work. The most effective methods: CSS (Critical Swim Speed) interval training at or above threshold pace, drill work to reduce drag, increasing weekly distance gradually over 8 to 12 weeks, and technique coaching to fix fundamental stroke flaws.
What is a good 100m swim time?
For a recreational adult swimmer, 1:45 to 2:15 per 100m is a good pace. Competitive age groupers aim for 1:25 to 1:45/100m. Beginners typically start at 2:15 to 3:00/100m. Elite swimmers are under 1:25/100m. Sustained 100m repeats (rather than a single all-out 100m) are the better benchmark for endurance swimmers.
How do I work out the pace I need for a target time?
Divide the target time in seconds by the distance in metres, then multiply by 100. For a 1500m swim in 30 minutes that is 1800 divided by 1500, times 100, which is 2:00 per 100m. The Time to Pace mode in the calculator above does it for you, and will also give the same pace per 100yd and the speed in km/h and mph.
How do I convert swim pace to speed?
Divide 360 by your pace in seconds per 100m to get speed in km/h. That constant is 3600 seconds in an hour times 100 metres, divided by 1000 metres in a kilometre. Example: 1:40/100m is 100 seconds, and 360 divided by 100 is 3.6 km/h. For miles per hour divide 223.7 by the seconds per 100m, or multiply the km/h figure by 0.621. The calculator above converts automatically.