Running Pace Calculator
How it worksConvert distance and time into pace — or race finish times
Free running pace calculator. Enter distance and finish time to get min/km (and min/mile), or project 5K, 10K, half, and marathon finish times from your pace.
Your pace
Pace / km
5:36 /km
Pace / mile
9:01 /mi
Finish times at this pace
About this Pace calculator
Pace turns raw distance and time into something you can train with — splits, race goals, and easy-day limits.
This tool computes average pace from a run you already did, then projects finish times at common race distances if you held that pace (real races usually need fueling and pacing strategy).
Terrain, heat, elevation, and fitness change what is realistic. Treat projections as planning aids, not guarantees.
A running pace calculator converts distance and time into min/km and min/mile, then projects finish times for 5K, 10K, half marathon, and marathon at that average pace. Habbeat keeps the math clean for planning workouts and race goals.
Runners searching “pace calculator,” “min per km,” and “5K pace” want fast answers they can trust. We also remind you that terrain, heat, and strategy matter as much as the spreadsheet.
Log outdoor routes in Habbeat to connect pace goals with real paths you walked or ran — then share the trail when you want accountability.
How to use this free tool
- Enter distance (km) and your time as mm:ss or h:mm:ss.
- We show pace per km and per mile.
- We also estimate finish times for 5K, 10K, half marathon, and marathon at that same average pace.
Worked examples
- Example: 10 km in 55:00 → 5:30 /km pace (~8:51 /mi).
- Example: Holding 5:30 /km projects ~27:30 for 5K and ~1:56 for a half — hills and fueling still change reality.
- Example: Easy runs often sit well slower than goal race pace; don’t force race pace every day.
Practical tips
- Use recent race or time-trial data for goal projections — not an all-out downhill segment.
- Build long-run and race pace separately; easy runs should usually be slower than goal pace.
- Negative splits (second half faster) often beat going out too hard.
Limitations & caveats
- Same average pace on hills vs flats is not the same effort.
- Race projections assume you can hold the pace with fueling and fitness.
- GPS error and stops affect watch pace vs pure math.
Frequently asked questions
How do I enter time?
Use m:ss (e.g. 28:30) or h:mm:ss (e.g. 1:32:10). A single number is treated as minutes.
Why don’t race projections match my watch?
Watches use GPS smoothing and personal models. This calculator is pure math: distance ÷ time. Hills and stops still count in average pace.
Can I use miles?
Enter distance in kilometres for now (1 mile ≈ 1.609 km). Pace is also shown as min/mile automatically.
How do I calculate running pace?
Pace = time ÷ distance. For min/km, divide total minutes by kilometres. Habbeat also shows min/mile automatically.
What is a good 5K pace?
It depends on experience and goals. Beginners may focus on finishing comfortably; experienced runners chase specific time goals. Use your recent races, not internet averages alone.
Why is my race slower than predicted?
Starting too fast, hills, heat, wind, fueling, and fitness gaps all matter. Predictions assume even pacing you can sustain.
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All toolsDisclaimer: These tools provide general estimates only. They are not medical advice. For health conditions, pregnancy, or personalised nutrition, speak with a qualified professional.