Enter any two of pace, time, and distance to find the third, then see predicted finish times for common race distances at that pace.
Straight-line extrapolation from your current pace — not a physiological model.
Divide your total time by the distance covered: convert your time to total seconds, divide by the distance, then convert the result back to minutes and seconds per unit. Running 5 km in 25 minutes works out to 1,500 seconds ÷ 5 km = 300 seconds per km, or 5:00/km.
It varies hugely from person to person, but a commonly cited illustrative range for beginners is roughly 6:00-8:00 per kilometer (about 10-13 minutes per mile). Treat that purely as a reference point rather than a target to hit — showing up consistently matters far more than any specific pace number early on.
This tool does a straight linear extrapolation from whatever pace you've entered or computed, not a physiological model like Riegel's formula, which accounts for endurance fall-off over longer distances. Real race performance also depends heavily on pacing strategy, terrain, weather, and how well-trained you are for the specific distance, so treat these predictions as a rough starting point rather than a guarantee.
No — pick whichever unit you actually train in. The math is unit-consistent either way: race distances are converted internally so the predictions below come out correctly whether you're working in km or miles. If you need to convert between the two elsewhere, the Unit Converter handles that directly.
Worked example: running 5 km in 25:00 gives a pace of 1,500 seconds ÷ 5 = 300 seconds per km, i.e. 5:00/km. At that same pace, a 10K would take 300 × 10 = 3,000 seconds, or exactly 50:00. Pair this with the Time Calculator for adding up split times, or the Calorie Calculator to estimate energy burned over a training run.