140.6 Time Calculator

Long-course triathlon time calculator

Choose the 140.6 distance below. The full distance is won and lost on pacing the bike so the marathon survives — this model makes that trade-off visible.

1 · Your race

Distance

Pick a race (optional) Auto-fills course elevation, temp and wetsuit.

Race date (optional)

Your goal

2 · Swim

Sustainable pace per 100m (mm:ss) The pace you could hold for a long swim. Blank = we estimate (wider range).

Open-water swim Wetsuit

3 · Bike

FTP (watts, optional)

Body weight (kg)

…or flat long-ride speed (km/h) We use power if FTP + weight are given, otherwise speed.

4 · Run

Any recent time helps — fill whichever you have.

10K

Half

Marathon

Run durability — long runs & bricks: 3/5

5 · Course & day

Bike climbing (m)

Wind

Temp (°C)

First-timer at this distance

Weekly training hours

Saved to this device only. No account, no upload.