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5K in 25 Minutes: Pace per KM and Mile

Calculate your running pace per km and per mile, finish time and km splits, or predict race times with the Riegel formula — right in your browser.

Processing... 0%
Reading race data
Calculating pace and speed
Building split table

Result

This page opens the running pace calculator with a 5K in 25:00 already filled in: the required pace is 5:00 per kilometer, which equals 8:03 per mile or a steady 12.0 km/h (7.5 mph).

A 25-minute 5K is a popular milestone for regular runners — it usually takes a few months of consistent training after the beginner stage. The split table shows what your watch should read at every kilometer: 5:00, 10:00, 15:00, 20:00 and 25:00 at the finish.

Change the time or distance to test other goals, switch to time mode to project a finish from a pace you can hold, or use the predictor to estimate your 10K, half and marathon from this 5K result.

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Accepted Formats & Rules

  • Pace mode: distance + time gives pace per km, pace per mile, speed and km splits
  • Time mode: distance + target pace gives your projected finish time
  • Predictor mode: one known race result forecasts 5K, 10K, half and marathon times with Riegel's T2 = T1 × (D2/D1)^1.06

Key Benefits

✓ Three calculators in one: pace from a race result, finish time from a target pace, and Riegel race-time predictions.
✓ Metric and imperial at once: every pace is shown in min/km and min/mile, every speed in km/h and mph.
✓ A ready split table for your distance, so you know exactly what the clock should show at every kilometer mark.

Use Cases

  • • Signed up for a 10K and want to know what pace gets you across the line in under 50 minutes?
  • • Need km-by-km split times written on your hand for Sunday's half marathon?
  • • Wondering what marathon time your latest 10K result predicts?