# What is my swim pace per 100? Computes swimming pace per 100 meters or per 100 yards from distance and time, or the finish time or distance from a pace, with the average speed. - Page: https://www.acalculator.org/sports/swim-pace-calculator - JSON spec: https://www.acalculator.org/sports/swim-pace-calculator.json - Version: df40e60db17e ## Default answer Example with the default inputs (Distance 1,640.41994750656 yd, Time 30 min, Pace per 100 m): Swimming 1,640 yd in 30:00 is a pace of 2:00 per 100 m. ## Inputs | Key | Label | Description | | --- | --- | --- | | d | Distance | The distance swum. A mile swim is 1,650 yd in a pool, an Olympic triathlon swim 1,500 m. | | t | Time | The time taken for the whole distance. | | p | Pace | The time taken for each 100 meters or each 100 yards. | | per | Pace per | Whether the pace is the time per 100 meters or per 100 yards. | ## Outputs | Key | Label | Description | | --- | --- | --- | | distance | Distance | The distance swum. A mile swim is 1,650 yd in a pool, an Olympic triathlon swim 1,500 m. | | time | Time | The time taken for the whole distance. | | pace | Pace | The time taken for each 100 meters or each 100 yards. | | paceText | Pace | The pace per 100 m or per 100 yd (as chosen), as m:ss with its unit, for example 2:00 per 100 m. | | finish | Finish time | The time for the whole distance, as h:mm:ss. | | per100m | Pace per 100 m | The time for each 100 meters, as m:ss. | | per100yd | Pace per 100 yd | The time for each 100 yards, as m:ss. | | speed | Average speed | The average speed: distance ÷ time. | ## Method pace = time ÷ (distance ÷ 100 m), or time ÷ (distance ÷ 100 yd) with 1 yd = 0.9144 m; speed = distance ÷ time. ## Assumptions - The pace is the average over the whole swim, turns and rests included. - Finish time and paces are rounded to the nearest second for display. - The distance is at least 1 meter, and the time and the pace are at least 1 second. ## Worked examples 1. per = m, d = 1,500, t = 1,800 gives p = 120, paceText = 2:00 per 100 m, per100yd = 1:50, finish = 30:00, speed = 0.833333. Source: NIST SP 811 (2008), Appendix B: 1 yd = 0.9144 m exactly, https://www.nist.gov/pml/special-publication-811 (retrieved 2026-10-05); 1500 m freestyle, https://www.worldaquatics.com/swimming (retrieved 2026-10-05). 2. per = yd, d = 1,508.76, t = 1,650 gives p = 100, paceText = 1:40 per 100 yd, per100m = 1:49, finish = 27:30. Source: NIST SP 811 (2008), Appendix B: 1 yd = 0.9144 m exactly, https://www.nist.gov/pml/special-publication-811 (retrieved 2026-10-05). 3. per = m, d = 400, p = 95 gives t = 380, finish = 6:20. 4. per = yd, t = 3,600, p = 90 gives d = 3,657.6. Source: NIST SP 811 (2008), Appendix B: 1 yd = 0.9144 m exactly, https://www.nist.gov/pml/special-publication-811 (retrieved 2026-10-05). ## FAQ ### How do I calculate swim pace per 100? Divide your time by the distance in hundreds. 1,500 m in 30 minutes is 1,800 s ÷ 15 = 120 s: 2:00 per 100 m. ### How do I convert pace per 100 yards to per 100 meters? 100 yd is 91.44 m, so divide the pace per 100 yd by 0.9144. A 1:40 pace per 100 yd is 100 ÷ 0.9144 = 109.4 s: 1:49 per 100 m. ### How long will a swim take at my pace? Multiply the pace by the distance in hundreds. 400 m at 1:35 per 100 m is 4 × 95 s = 380 s, or 6:20. ### What is a good swim pace? Many fitness swimmers hold 2:00 to 2:30 per 100 m over a long swim; strong triathletes swim near 1:30 per 100 m, and elite 1,500 m swimmers under 1:00. ### How far is a mile swim? A pool mile is usually 1,650 yd (66 lengths of a 25-yard pool), a little short of the 1,760 yd land mile. Open-water miles are often 1,500 or 1,609 m. ## Sources - NIST SP 811 (2008), Appendix B: 1 yd = 0.9144 m exactly. https://www.nist.gov/pml/special-publication-811 (retrieved 2026-10-05) - World Aquatics, Swimming: pool lengths and race distances. https://www.worldaquatics.com/swimming (retrieved 2026-10-05)