Projected finish times
Even-pace finish-time projection for standard race distances.
Finish time
Race Pace Calculator
Enter a running pace or a recent time and distance to estimate equivalent finish times for 5K, 10K, half marathon, and marathon distances.
Pace5:00/km8:03/mile equivalent
10K projection50:00Even pace estimate
Marathon projection3:30:59Fatigue not modelled
Pace results
5K5 km at 5:00/km25:00
10K10 km at 5:00/km50:00
Half marathon21.1 km at 5:00/km1:45:29
Marathon42.2 km at 5:00/km3:30:59
Pace conversion
The same effort expressed as minutes per kilometre and minutes per mile.
Pace
Pace used
Minutes per km5:00/km
Minutes per mile8:03/mile
SourceUses the entered pace directlyKnown pace
Assumptions
Calculation notes
- Uses fixed race distances: 5K, 10K, half marathon 21.0975 km, and marathon 42.195 km.
- Does not apply fatigue curves, age grading, elevation adjustment, wind, temperature, trail surface, or training status.
- If calculating from a short effort, marathon and half-marathon projections can be optimistic.
Guide
How to use the Race Pace Calculator
Enter a running pace or a recent time and distance to estimate equivalent finish times for 5K, 10K, half marathon, and marathon distances. It is useful for checking body-measurement reporting figures or planning training and race-pace scenarios because it keeps inputs, charted outputs, notes, and related next steps on the same page.
Start by checking calculate from, pace unit, pace minutes, and pace seconds. The results update as assumptions change, so you can compare scenarios before downloading a CSV report.
Inputs
Inputs to check
- Calculate from: Choose whether to start from pace or a known run result.
- Pace unit: Choose the option that best matches the case you are modelling.
- Pace minutes: Enter the value min you want to test.
- Pace seconds: Enter the value sec you want to test.
FAQs
Race Pace Calculator FAQs
What is the Race Pace Calculator for?
Enter a running pace or a recent time and distance to estimate equivalent finish times for 5K, 10K, half marathon, and marathon distances. Use it when you want a quick, editable estimate with charted results and visible assumptions.
Which assumptions should I check first?
Start with calculate from, pace unit, pace minutes, and pace seconds. Then review the calculation notes for anything the tool does not include.
Are the results exact?
The result is a planning estimate, not medical, fitness, nutrition, training, or diagnostic advice. Check NHS guidance, a GP, pharmacist, coach, or qualified professional where health or safety matters.
Can I keep or compare the result?
Yes. Use the Download CSV button on the calculator page to export the current inputs, headline results, detailed rows, chart data, insights, and notes.
What should I try next?
Try Triathlon Pace Calculator and NHS BMI Calculator next. These tools are linked because they use related assumptions or answer the next practical question.