| Distance | Time | Laps (25m) | Calories |
|---|
Yards and metres convert using the exact standard: 1 yard = 0.9144 metres. Since a 25-yard pool and a 25-metre pool are genuinely different distances, converting your pace correctly between them matters more in swimming than in most other sports.
Lap counts assume a standard 25 metre pool. A yards-based pace is scaled to a true per-100-metre pace by dividing by 0.9144, rather than just relabeling the number — a common mistake that understates how fast a swimmer training in a yards pool is actually swimming.
Calories burned use standard MET values for each stroke, moving from an easy to a vigorous value as your pace gets faster, then scale by your weight and time in the water. A 70 kg swimmer burns roughly 425 kcal an hour on easy freestyle at 3:00 per 100 m, and about 630 at a brisk 2:00. It's an average across swimmers, not a heart-rate-based or personalized burn estimate.
Because a 25-yard pool is shorter than a 25-metre pool, the same swim time represents a different speed. Simply relabeling a yards pace as a metres pace would understate how fast you actually swam, so the calculator properly rescales the pace using the 0.9144 conversion factor.
A standard 25 metre pool. If your pool is a different length, calculate laps by dividing your total distance by your actual pool length instead.
It uses standard MET values for each stroke from the Compendium of Physical Activities, scaled by your weight and by how fast your pace is. It's a sound average — not a personalized or heart-rate-based burn estimate, which would vary by effort level, technique, and body composition.
Yes for calorie estimates — each stroke has its own MET value, since strokes like butterfly burn calories faster than an easy freestyle pace.
