Swim Pace Calculator
Pace per 100, total set time and lap counts for any pool length.
Enter your values
Enter the distance swum in m.
Enter the total time in mm:ss.
Choose one of: 25 m, 50 m, 25 yards, 20 m.
Enter the rest between 100s in seconds.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Pace per 100
- 1:54
- Pace per 50
- 0:57
- Speed
- 0.88 m/s (3.16 km/h)
- Lengths swum
- 60 at 25 m
- Time per length
- 0:28
- Interval for 100s
- 2:10
- Projected 1500 m
- 28:30
Working
- 128:30 / (1,500 / 100) = 1:54 per 100
Quick answer
Swim pace is normally expressed per 100 metres or 100 yards. Dividing total time by hundreds of distance gives a pace you can compare across any set.
pace per 100 = total seconds / (distance / 100)
At a glance
| What it does | Pace per 100, total set time and lap counts for any pool length. |
|---|---|
| Category | Fitness |
| Inputs needed | Distance swum, Total time, Pool length, Rest between 100s |
| Main output | Pace per 100 |
| Formula | pace per 100 = total seconds / (distance / 100) |
| Cost | Free — no sign-up, no download |
How to use the Swim Pace Calculator
- 1Enter the distance and total time for a continuous swim.
- 2Select the pool length so lap counts and per-length splits are right.
- 3Use the interval figure to set a repeatable send-off on the pace clock.
Inputs explained
- Distance swum(m)
- Enter the distance swum in m.
- Total time(mm:ss)
- Enter the total time in mm:ss.
- Pool length
- Choose one of: 25 m, 50 m, 25 yards, 20 m.
- Rest between 100s(seconds)
- Enter the rest between 100s in seconds.
Worked example
Using the values the calculator loads with:
Inputs
- Distance swum1500 m
- Total time28:30 mm:ss
- Pool length25 m
- Rest between 100s15 seconds
Results
- Pace per 1001:54
- Pace per 500:57
- Speed0.88 m/s (3.16 km/h)
- Lengths swum60 at 25 m
- Time per length0:28
- Interval for 100s2:10
- Projected 1500 m28:30
- 28:30 / (1,500 / 100) = 1:54 per 100
Frequently asked questions
How do I convert yards pace to metres?
Multiply a per-100-yard time by about 1.09 to approximate the per-100-metre equivalent for the same effort.
What is a decent 100 m pace?
Around 2:00 for a fit recreational swimmer, 1:30 for a strong club swimmer, and under 1:10 for competitive distance swimmers.
What do I need to enter into the Swim Pace Calculator?
Just 4 values: distance swum, total time, pool length, rest between 100s. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Swim Pace Calculator work out the answer?
Swim pace is normally expressed per 100 metres or 100 yards. Dividing total time by hundreds of distance gives a pace you can compare across any set. It applies the formula pace per 100 = total seconds / (distance / 100) and shows the working so you can check each step by hand.
Is the Swim Pace Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.