Swimming Speed vs Vertical Speed
The swimming speed calculator and the vertical speed calculator are both distance-over-time tools with a twist: they report the rate for a specific kind of movement. The swimming speed calculator turns swim distance and elapsed time into average speed, pace per 100 meters, equivalent pool lengths, and constant-pace projected times. The vertical speed calculator turns signed vertical distance and elapsed time into neutral ascent or descent rates per second, per minute, and per hour, in meters and feet. The genuine choice is the movement you are actually measuring: laps in a pool, or vertical gain on a hill.
Neither calculator judges the result. The swimming page does not assign a performance level, and the vertical speed page notes that positive and negative values indicate direction only — no aircraft, hiking, or personal-performance inference is made.
What each calculator does
The swimming speed calculator takes a swim distance and elapsed seconds. Average speed is distance divided by elapsed time, converted to meters per second; pace per 100 meters is 100 divided by that speed. A pool length you enter is used to report equivalent lengths, which may be fractional, and projections apply the same average pace to the whole distance without adjusting for stroke. Starts, turns, rests, pool measurement, and timing method count only insofar as they are present in the elapsed time you enter.
The vertical speed calculator takes a signed vertical distance and elapsed minutes and seconds. It converts the distance exactly — feet are multiplied by 0.3048 to obtain meters, and meters are divided by 0.3048 to obtain feet — then divides by the raw elapsed time and reports neutral per-second, per-minute, and per-hour rates. A nonzero rate whose supported fixed-precision values would all round to zero is reported as too small to display rather than as a zero, and zero elapsed time triggers a validation message.
Side-by-side comparison
| Feature | Swimming Speed Calculator | Vertical Speed Calculator |
|---|---|---|
| Movement measured | Horizontal swim distance | Vertical ascent or descent |
| Inputs | Swim distance + elapsed seconds (+ pool length) | Signed vertical distance + elapsed time |
| Method | Speed = distance ÷ time; pace = 100 ÷ speed | Vertical distance ÷ elapsed time, exact unit conversion |
| Outputs | m/s, pace per 100 m, equivalent lengths, projected times | Per-second, per-minute, per-hour rates in m and ft |
| Direction handling | Not applicable (distance is positive) | Positive = ascent, negative = descent |
| Boundary | No performance level assigned | No aircraft, hiking, or personal-performance inference |
When to use which
Use the swimming speed calculator when you are pacing pool workouts or races: enter the distance and elapsed seconds, and plan with pace per 100 meters, equivalent lengths for your pool, or a constant-pace projection to a longer distance. Use the vertical speed calculator when you have signed vertical gain or loss over time — a climb, descent, or other vertical movement — and want the neutral rate in consistent units. The two never compete for the same input; they cover different movement directions, and both results are planning values rather than performance verdicts.
Where to start
- Swimming speed calculator — speed, pace per 100 meters, equivalent pool lengths, and projected times.
- Vertical speed calculator — neutral ascent or descent rates from signed vertical distance and elapsed time.