Triathlon Calculator

You enter your expected swim pace (per 100m or 100yd), bike speed, run pace, and transition times. The calculator multiplies each pace/speed by the segment distance to produce a time in minutes, then sums all segments — swim, T1, bike, T2, and run — to give your projected total finish time.

Sprint: 750m swim / 20km bike / 5km run. Olympic: 1.5km swim / 40km bike / 10km run. Half-Ironman (70.3): 1.9km swim / 90km bike / 21.1km run. Ironman (140.6): 3.86km swim / 180km bike / 42.2km run.

Swim pace is expressed as the time it takes to cover 100 meters (metric) or 100 yards (imperial). For example, a pace of 2:00 min/100m means you swim 100 meters in two minutes. You can estimate your pace from pool training sessions.

For beginners, T1 (swim-to-bike) and T2 (bike-to-run) transitions of 3–5 minutes each are common. Experienced athletes typically aim for under 2 minutes per transition. Elite racers can complete transitions in under 60 seconds.

Yes — select 'Custom' from the Race Distance dropdown and manually enter your own swim, bike, and run distances. This is useful for non-standard events, training bricks, or duathlons where you only need certain segments.

To convert a pace in min/100yd to min/100m, multiply by 0.9144 (since 1 yard = 0.9144 meters). For example, 2:00/100yd ≈ 1:50/100m. Alternatively, switch the Units toggle to Imperial and the calculator handles the conversion automatically.

Beginner triathletes typically average 20–25 km/h (12–15 mph) on the bike. Intermediate athletes ride at 30–35 km/h (18–22 mph), while advanced and elite athletes can sustain 40+ km/h (25+ mph). Flat courses, road bikes, and aero gear all improve speed.

The calculator gives a theoretical estimate based on consistent pace and speed throughout each segment. Real-world results vary due to course terrain, weather, fatigue, nutrition, and equipment. Use the result as a planning benchmark, not a guarantee.