glunty Running Pace Calculator
Enter any two of distance, time, and pace. Get the third, plus average speed and race finish times.
- Runs in your browser
- No sign-up
- No watermark
- No installs
Result
| Pace | |
| Average speed |
Race finish times at this pace
| Race | Distance | Finish time |
|---|
What this tool does
This is a running pace calculator. Pace, time, and distance are tied together by a single relationship: time equals distance times pace. If you know any two of them, the third is fixed. Enter the two values you have and the tool fills in the missing one, then reports your average speed in both km/h and mph. It also lists finish times for the common race distances at your current pace. Everything is plain arithmetic that runs in your browser; nothing is sent anywhere.
How to use it
Pick what you want to solve for: pace, time, or distance. The field for that value becomes read-only and shows the answer; you fill in the other two. Distance takes a km or mi toggle. Time is entered as hours, minutes, and seconds. Pace is minutes and seconds per km or per mi. Results update as you type. For example, 5 km covered in 25:00 is a pace of 5:00 per km and an average speed of 12 km/h.
Common use cases
- Planning a goal finish time for a 5K, 10K, half marathon, or marathon.
- Working out the pace you need to hit a target time over a known distance.
- Translating a treadmill speed into a road pace, or the reverse.
- Checking training splits and comparing per-mile against per-kilometre pace.
- Estimating how far you covered from a run duration and your usual pace.
Common pitfalls
- Average pace is not even pace. Real courses have hills, wind, and fatigue. A flat average hides the fast and slow sections of an actual run, so use it as a planning number, not a guarantee.
- Mile and kilometre paces look similar but are not. A 5:00 per km is not a 5:00 per mile. A mile is longer, so per-mile pace numbers are always larger for the same effort. Watch which unit your device reports.
- GPS distance can drift. Watches round corners and lose signal under trees or between tall buildings, so a measured pace can differ from the certified course distance. Treat the paced projection as an estimate.
- Treadmills report speed, not pace. Convert with this tool, or remember that pace equals 60 divided by speed in units per hour.
Frequently asked questions
- How does a running pace calculator work?
- Pace, time, and distance are linked by one equation: time equals distance multiplied by pace. Give the tool any two of the three values and it solves for the missing one. It also derives average speed, which is distance divided by time. All of the arithmetic runs in your browser.
- What is a good running pace for a beginner?
- There is no single answer, because pace depends on fitness, terrain, heat, and goals. Many new runners cover a kilometre in 6 to 8 minutes, or a mile in about 10 to 13 minutes, often mixing running with walking. The number that matters is your own recent pace; use it to project finish times and to set realistic targets.
- How do I convert pace between minutes per mile and minutes per kilometre?
- One mile is 1.609344 kilometres. To go from pace per mile to pace per kilometre, divide the seconds-per-mile figure by 1.609344. To go the other way, multiply. For example, 8:00 per mile is about 4:58 per kilometre. The unit toggle in this tool does the conversion for you.
- How do I calculate my finish time for a race?
- Enter your target pace and the race distance, then read the time. For standard races the reference table does this automatically at your current pace: 5K, 10K, the half marathon at 21.0975 kilometres, and the marathon at 42.195 kilometres. For example, a 5:00 per kilometre pace finishes a marathon in about 3 hours and 30 minutes.
- What is the difference between pace and speed?
- They describe the same motion from opposite directions. Pace is time per unit of distance (minutes per kilometre or per mile); speed is distance per unit of time (kilometres or miles per hour). A faster effort means a lower pace number but a higher speed number. This tool shows both, so you can use whichever your watch or treadmill reports.
- Does the calculator store or send my data?
- No. Everything is computed locally with plain arithmetic. There are no network requests while the tool runs, no account, and no tracking. You can confirm this by opening your browser DevTools and watching the Network tab while you type.
Cite this tool
For academic, journalistic, or technical references. Pick a format:
Citations use 2026 as the publication year. Access date is left as a fillable placeholder where the citation style expects one.