You enter a swim distance, pick yards or meters, and provide your total time. The tool divides total seconds by distance and multiplies by 100 (or 50) to find pace per 100 and per 50. It converts distance to miles and kilometers to compute speed, then extrapolates times for standard distances by applying the same per-unit pace. Yards mode shows 500/1000/1650; meters mode shows 400/800/1500.
The calculator assumes you maintain the same per-100 pace for every distance. In reality, pace slows as distance increases due to fatigue. A 100-yard sprint pace is typically 10–20% faster than your 1650 pace. Use predicted times as rough targets, not exact guarantees.
Recreational swimmers typically hold 2:00–3:00 per 100 yards. Competitive club swimmers are often 1:10–1:30, and elite swimmers break under 1:00. Your pace depends heavily on stroke technique, fitness, and the stroke being swum.
One meter equals about 1.094 yards. A 25-yard pool is shorter than a 25-meter pool by about 2.3 yards per length. Times in meters are typically 10–12% slower than equivalent yard distances due to the extra distance per lap.
In yards-based pools, the 1650 is the "mile" event (actually 1650 yards = 1508 meters, slightly more than a mile at 1609 meters). In meters, the equivalent is the 1500 — sometimes called the "metric mile."
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.