Pace
calculator
Pace, time, distance, know two, get the third. Plan a race pace, predict a finish time, or find out what that run this morning actually averaged, in min/km or min/mile.
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The runner's triangle
Pace, time and distance lock together: pace is time divided by distance, so fixing any two determines the third. The only wrinkle is units, a mile is 1.609344 km, which is why 5:00/km equals a suspiciously precise 8:03/mi.
Race-pace reality
Even pacing wins: most PBs come from splits within a few seconds of each other, and going out 15 seconds fast in a marathon's first half routinely costs minutes in the second. Practical trick, memorize your goal pace's 5 km checkpoints rather than doing mid-race arithmetic.
Common paces for context
Brisk walking sits near 9–10 min/km; easy conversational running for many recreational runners lands around 6–7 min/km; a 4:00/km 10K (40:00) is a strong club-runner standard. For the heart-rate side of training intensity, the heart-rate zone calculator pairs with this page.
Running pace FAQ
Divide total time by distance. A 52:30 10K is 3,150 seconds over 10 km, 5:15 per kilometer, about 8:27 per mile.
Multiply by 1.609344. A 5:00/km pace is 8:03/mi; going the other way, divide.
Enormously individual. As broad reference points: many recreational runners finish a 5K between 25 and 35 minutes (5:00–7:00/km); sub-50 for 10K is a common milestone; sub-40 is strong club level.
Almost always yes, even or slightly negative splits (second half marginally faster) produce most personal bests. Banking time early usually costs more later than it saves.