What is a good swim pace per 100m?

Swimming pace benchmarks per 100m by sex: Male: - Elite (competitive): under 1:00/100m - Advanced club: 1:00–1:15/100m - Intermediate: 1:15–1:35/100m - Recreational: 1:35–2:00/100m - Beginner: 2:00–3:00/100m - Just starting: over 3:00/100m Female: - Elite (competitive): under 1:06/100m - Advanced club: 1:06–1:24/100m - Intermediate: 1:24–1:48/100m - Recreational: 1:48–2:15/100m - Beginner: 2:15–3:20/100m - Just starting: over 3:20/100m Context for typical swimmers: - A 2:00/100m pace is very comfortable for a regular recreational swimmer - Most gym pool lap swimmers average around 2:00–2:30/100m - A 1:30/100m pace puts you in the top 25% of regular lap swimmers - Sub-1:20/100m requires dedicated training World record reference (1500m freestyle): - Male WR pace: ~0:58/100m (Sun Yang) - Female WR pace: ~1:03/100m (Katie Ledecky)

How do I convert between /100m and /100y pace?

The conversion factor is based on the metre-to-yard ratio: 1 yard = 0.9144 metres 1 metre = 1.09361 yards Converting /100m to /100y: Pace (sec/100y) = pace (sec/100m) × 0.9144 100 yards is shorter than 100 metres, so you complete it in less time (lower seconds). Converting /100y to /100m: Pace (sec/100m) = pace (sec/100y) × 1.09361 Common conversions: 1:00/100m = 0:55/100y 1:20/100m = 1:13/100y 1:30/100m = 1:22/100y 1:45/100m = 1:36/100y 2:00/100m = 1:49/100y 2:30/100m = 2:17/100y 3:00/100m = 2:45/100y Why this matters: USA uses short course yards (SCY) as the primary training measurement. Most US swim records, training programs, and workout paces are in /100y. International and Olympic swimming uses metres. If you train in the USA but swim internationally, this conversion is essential for comparing performances.

What is Critical Swim Speed (CSS) and how do I use it?

Critical Swim Speed (CSS) is the fastest pace you can sustain aerobically — the swimming equivalent of lactate threshold in running. Training at CSS pace maximises aerobic adaptation and is the most important pace for improving fitness. Formula: CSS (m/s) = 200 / (T400 − T200) Where T400 = 400m time trial time in seconds, T200 = 200m time trial time in seconds. Example: 400m time trial: 6:30 = 390 seconds 200m time trial: 3:00 = 180 seconds CSS = 200 / (390 − 180) = 200 / 210 = 0.952 m/s CSS pace = 100 / 0.952 = 105 sec = 1:45/100m How to test for CSS: 1. Warm up thoroughly (400m easy, some drills) 2. Rest 10 minutes 3. Swim 400m time trial — maximum sustainable effort, not sprint 4. Rest 5 minutes 5. Swim 200m time trial — maximum effort 6. Enter both times in the CSS calculator How to use CSS in training: - CSS pace = your primary threshold training pace - CSS sets: 10-20 × 100m at CSS pace with 10-15 sec rest - Or: 5-8 × 200m at CSS with 20-30 sec rest - Retest every 6-8 weeks to track progress CSS should feel 'comfortably hard' — you should finish each rep with something left, but not feel like it was easy.

What is the difference between SCM, LCM, and SCY pools?

Pool type affects lap counts, turn frequency, and performance times: SCM — Short Course Metres (25m): - Most common training pool worldwide - Olympic pools are split into 25m sections for training - More turns than LCM (every 25m) - Turns allow brief recovery and can inflate times vs LCM - Typical swim clubs and leisure centres use 25m pools LCM — Long Course Metres (50m): - Olympic standard — all Olympic swimming events use 50m pools - Fewer turns per km (every 50m) - Generally 2-4 seconds per 100m slower than SCM due to fewer turns - Builds more pure swimming strength and endurance - World records are only set in LCM pools at major competitions SCY — Short Course Yards (25y): - Standard in the United States - 25 yards = 22.86 metres (shorter than 25m by ~2.14m) - NCAA and USA Swimming competitions typically use 25y - Most American training plans and workout paces are in /100y - Pace in seconds per 100y will always be lower than /100m (shorter distance) Performance comparison: A swimmer at 1:30/100m SCM might swim: ~1:22/100y SCY (same physical effort, shorter distance) ~1:34/100m LCM (same physical effort, fewer turns) For triathlon and open water: performances are measured in metres and conditions vary so much that pool pace is only a rough guide.

What triathlon swim distances correspond to which events?

Standard triathlon swim distances: Super Sprint: - Swim: 400-750m - Typical finish: 5-12 min for experienced swimmers Sprint Triathlon: - Swim: 750m - Typical amateur time: 12-18 min - At 2:00/100m: 15:00 | At 1:30/100m: 11:15 Olympic / Standard: - Swim: 1500m - Typical amateur time: 22-35 min - At 2:00/100m: 30:00 | At 1:30/100m: 22:30 Half Ironman (70.3): - Swim: 1.9km (1900m) - Typical amateur time: 35-60 min - At 2:00/100m: 38:00 | At 1:45/100m: 33:15 Full Ironman: - Swim: 3.8km (3800m) - Typical amateur time: 70-120 min - At 2:00/100m: 76:00 | At 1:45/100m: 66:30 Important notes for triathletes: - Open water swimming is typically 5-10% slower than pool pace due to no lane ropes, sighting, and navigation - Wetsuit use in cold water can add 4-8 sec/100m to speed - Drafting behind other swimmers saves 10-30% energy - For race planning, add 10-15% to your pool pace for open water estimates Swim-to-bike transition also needs 2-5 minutes, so don't plan your race solely based on pure swim time.

Swimming Pace Calculator — Per 100m, 100y & Pool Laps

The Swimming Pace Calculator converts between swim pace (per 100m or per 100y), finish time, and distance for 10 swim distances including pool swims (100m to 1500m) and triathlon distances (750m sprint, 1.5km Olympic, 1.9km 70.3, 3.8km Ironman). Supports three pool types: 25m SCM, 50m LCM, and 25y SCY. Displays pace in..

YOUR SWIM

ENTER YOUR

PACE (min:sec/100m)

DISTANCE

YOUR SWIM PACE

PACE

2:00

/100m

PER 100y

1:50

SPEED

3.00

km/h

1500M

30:00

LEVEL (MALE)

Beginner

2:00–3:00 — building technique

POOL LAPS & LENGTHS

laps

(down + back)

120

lengths

(one direction)

25m (SCM)

pool

FINISH TIMES AT THIS PACE

PACE REFERENCE & FITNESS LEVELS

Pace/100m	Pace/100y	Level	1500m Time
0:55	0:50	Elite	13:45
1:00	0:55	Advanced	15:00
1:10	1:04	Advanced	17:30
1:20	1:13	Intermediate	20:00
1:30	1:22	Intermediate	22:30
1:40	1:31	Recreational	25:00
1:50	1:41	Recreational	27:30
2:00	1:50	Beginner	30:00
2:15	2:03	Beginner	33:45
2:30	2:17	Beginner	37:30
3:00	2:45	Just Starting	45:00

Created with ❤️ byeaglecalculator.com

HOW TO USE

1
Select your sex for the fitness level benchmarks, choose your pool type (25m Short Course Metres — the most common training pool; 50m Long Course Metres — Olympic standard; or 25y Short Course Yards — standard in the USA), and decide whether to enter a pace or a finish time. Switching pool type automatically updates the lap count shown below the results.
2
In pace mode, enter your pace per 100 metres or per 100 yards using the toggle. Type in M:SS format (e.g. 2:00 for 2 minutes per 100m). Quick-select buttons show common paces from 1:00 to 3:00. The calculator automatically converts between metres and yards and displays both simultaneously in the results panel — so there's never any need to switch units.
3
In time mode, enter hours, minutes, and seconds for the finish time. Then select your distance from 10 options: pool distances (100m, 200m, 400m, 800m, 1500m), open water (1 mile), and triathlon swims (750m sprint, 1.5km Olympic, 1.9km 70.3, 3.8km full Ironman). The calculator derives your pace per 100m from the time and distance.
4
Read your results: pace per 100m in large numerals, pace per 100y, speed in km/h, your fitness level from a 6-tier scale (Elite to Just Starting), and the finish time for the selected distance. The blue Laps & Lengths panel shows exactly how many pool lengths and laps you need for the selected distance in your chosen pool — including a warning if the distance doesn't divide evenly into pool lengths.
5
Check the right panel: the finish times bar chart shows how long each distance takes at your pace from 100m to 3800m (Ironman). The pace reference table shows 11 common benchmark paces in both /100m and /100y, with fitness level labels and the corresponding 1500m time — useful for goal-setting. Optionally expand the Critical Swim Speed (CSS) panel to calculate your lactate threshold pace from a 400m and 200m time trial.

WORKED EXAMPLE

Swimming Pace Calculator — worked examples: EXAMPLE 1: PACE → TIME Input: 2:00/100m pace (= 120 sec/100m) Distance: 1500m Pace in yards: 120 × 0.9144 = 109.7 sec = 1:50/100y Speed: 100/120 = 0.833 m/s = 3.0 km/h Finish time: 120 × (1500/100) = 120 × 15 = 1800 sec = 30:00 Pool laps at 2:00/100m in 25m SCM pool: - Lengths: 1500/25 = 60 - Laps: 60/2 = 30 laps All distances at 2:00/100m: 100m: 120 × 1 = 2:00 200m: 120 × 2 = 4:00 400m: 120 × 4 = 8:00 800m: 120 × 8 = 16:00 1500m: 120 × 15 = 30:00 1900m: 120 × 19 = 38:00 3800m: 120 × 38 = 1:16:00 EXAMPLE 2: TIME → PACE Input: 400m in 6:00 (360 sec) Pace = 360 / (400/100) = 360/4 = 90 sec = 1:30/100m Speed = 100/90 = 1.11 m/s = 4.0 km/h EXAMPLE 3: CSS CALCULATION 400m TT: 6:30 (390 sec) 200m TT: 3:00 (180 sec) CSS = 200 / (390-180) = 200/210 = 0.952 m/s CSS pace = 100/0.952 = 105 sec = 1:45/100m UNIT CONVERSIONS: 1:30/100m = 90 × 0.9144 = 82.3 sec = 1:22/100y 1:30/100y = 90 × 1.09361 = 98.4 sec = 1:38/100m

REFERENCE FORMULAS

FORMULA REFERENCE TABLE

Name	Formula	Description
Pace from time	Pace (sec/100m) = total_time_sec / (dist_m / 100)	400m in 6:00 (360s): 360 / (400/100) = 360/4 = 90 sec = 1:30/100m.
Time from pace	Time (sec) = pace(sec/100m) × dist_m / 100	1:30/100m for 1500m: 90 × (1500/100) = 90 × 15 = 1350 sec = 22:30.
Speed from pace	Speed (m/s) = 100 / pace(sec/100m)	1:30/100m = 100/90 = 1.11 m/s = 4.0 km/h.
m/100m to /100y	Pace(sec/100y) = pace(sec/100m) × 0.9144	1 yard = 0.9144 m. 100 yards is shorter than 100m, so pace in seconds is lower. 2:00/100m → 1:50/100y.
y/100y to /100m	Pace(sec/100m) = pace(sec/100y) × 1.09361	1:30/100y × 1.09361 = 1:38/100m.
Pool laps	Laps = distance_m / (pool_length_m × 2)	1500m in 25m pool: 1500/25 = 60 lengths = 30 laps.
CSS (Critical Swim Speed)	CSS (m/s) = 200 / (T400 − T200)	T400 = 400m TT time (sec), T200 = 200m TT time. Represents lactate threshold pace.
SWOLF score	SWOLF = strokes per length + seconds per length	Lower SWOLF = more efficient. A 25m length in 25 sec with 20 strokes = SWOLF 45.

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Last updated: April 29, 2026 · 1 yard = 0.9144 m · CSS: Olbrecht (2000), Ginn (1993) · Pool types: SCM 25m, LCM 50m, SCY 25y