Race Distance
Split Checkpoint

finish = split time × (race ÷ split distance)

(pure linear extrapolation — no fatigue adjustment)
Time at 1KFormat: MM:SS or H:MM:SS
Projected 5K Time

Enter your checkpoint time and the projection lands here. Try:

This projection assumes you hold your checkpoint pace to the line — early splits usually flatter you. For predictions between different race distances, use the Riegel race predictor, which accounts for fatigue.