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.
: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. Results are based on standard formulas and may not reflect individual fitness, conditions, or race-day variables.
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 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.
Beginner: 2:30–3:00 per 100m (2.0–2.4 km/h)
Intermediate: 1:45–2:15 per 100m (2.7–3.4 km/h)
Competitive club: 1:20–1:45 per 100m (3.4–4.5 km/h)
Elite: under 1:10 per 100m (over 5.1 km/h)
Pool vs open water
Why open water is slower
Open water swimming is typically 5–15% slower than pool swimming for the same effort. 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 + 5–10s
Choppy water: pool pace + 10–20s
Drafting benefit: −5–8s 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 5–15% for open water conditions.
Ironman: 3800m. Cut-off 2h 20min. Typical age group time: 55–90 minutes.
Wetsuit advantage: approximately 2–3 minutes for an Ironman swim, or roughly 20–30 seconds per 100m in buoyancy and reduced drag.
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 are typically 10–15% slower than pool times due to sighting, currents, and drafting. Use the calculator above for precise pace calculations.
What Is a Good Swim Pace?
Swimming pace per 100m is the standard benchmark across pool and open water training. 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+
< 2.0
Learning technique, frequent stops
Novice
2:15–3:00
2.0–2.7
Can swim continuously, basic stroke
Intermediate
1:45–2:15
2.7–3.4
Comfortable 1500m, decent technique
Advanced
1:25–1:45
3.4–4.2
Competitive age-group, efficient stroke
Elite
< 1:25
> 4.2
Competitive swimmer, near-perfect form
How to Calculate Swimming Pace
Swimming pace is expressed as time per 100 metres (or 100 yards). To calculate swim pace: divide your total swim time in seconds by the distance in metres, then multiply by 100. For example, swimming 1500m in 30 minutes: (1800 seconds ÷ 1500m) × 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
Pool swimming is typically 10–15% faster than open water at the same effort level. 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 10–15% to your pool pace to estimate your open water swim pace. If you swim 1:45/100m in the pool, expect approximately 1:55–2:00/100m in open water. For race-specific conditions like temperature and current, our open water swim calculator handles the adjustments.
How to Improve Your Swim Pace
Swim pace improves through technique, not just fitness. 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.
Most recreational swimmers can drop 15–30 seconds per 100m through technique work alone. 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 2:30–3:00 per 100m. Recreational adult swimmers who train regularly typically swim at 2:00–2:30 per 100m. Competitive club swimmers are in the 1:30–1:50 range. Elite open water and triathlon swimmers pace at 1:10–1:25 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) is a solid 1500m swim time benchmark. Competitive swimmers target 20–25 minutes (1:20–1:40 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 — every result shows both per 100m and per 100yd.
Is 2 minutes per 100m a good swim pace?
2:00 per 100m 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?
Open water swimming is typically 5–15% slower than pool pace for the same effort. Without a wetsuit, expect to be 10–20 seconds per 100m slower than your 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 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 swim at around 1:00–1:05 per 100m.
How do I improve my swimming pace?
The most effective ways to improve pace are: CSS (Critical Swim Speed) interval training at or above threshold pace, drill work to improve stroke efficiency and reduce drag, increasing weekly distance gradually over 8–12 weeks, and technique coaching to fix fundamental stroke flaws. Most recreational swimmers improve their pace by 10–20 seconds per 100m within 3 months of structured training.