Swim Pace Calculator
Use a swim pace calculator to turn distance and time into per-100m pace, split targets, CSS zones, and Garmin-ready workout send-offs.
A swim pace calculator answers one boring but critical question: what pace should this set actually use? Enter distance and time, then turn the result into per-100m pace, 50m splits, CSS training zones, and send-offs you can hold in the pool. The useful version is simple. If you swim 400m in 7:12, your average pace is 1:48 per 100m. That number can become a threshold target, a set of even splits, or a Garmin workout step.
Without it, you are guessing. Guessing is adorable until rep six, when the pace clock starts collecting bodies. What a swim pace calculator should tell you Example pace targets Pace: · 50 split: · Send-off: How to use it for CSS pace CSS pace is your sustainable threshold pace. Run a 400m and 200m test, calculate the pace gap, then use that result for repeat 100s and 200s.
A calculator keeps the math honest: if CSS is 1:48/100m, then 6×100 threshold should be near 1:48 with 10–20 seconds rest, not whatever heroic nonsense felt possible after coffee. Turn calculator output into a real workout Pick the goal first, then set the send-off. For aerobic work, add 15–25 seconds rest per 100m. For threshold work, add 10–20 seconds.
For sprint 25s and 50s, use enough rest to keep speed high. The calculator gives the pace; the workout decides the adaptation. Use AquaPlan's calculator, then build the set Start with the free swim pace calculator, then use AquaPlan to turn the target pace into structured sessions and Garmin-ready workouts. Use the calculator as the translation layer: test result → pace → splits → send-off → workout.
That is how a number becomes a session instead of another spreadsheet shrine.
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Written and maintained by AquaPlan Team, Swim Training & Product.
The AquaPlan team builds swim-training software for structured pool workouts, Garmin-compatible FIT export, printable workout PDFs, and progress tracking.
Focus areas: Structured swim workout design, Garmin-compatible FIT file export, Pool training plans and workout-library systems, Swim training tools for web, iOS, and Android.
Editorial standard: AquaPlan training guides are checked against the current workout builder, workout library, Garmin export workflow, and product limits before publication.