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Pace Calculator

Running pace (min/mile or min/km).

Result

Pace

9.677min/mile

Pace
6.013min/km

Pace Calculator

What this calculator does

This calculator converts between pace (minutes per mile or km), speed (miles or km per hour), and race finish times for runners and walkers. Enter any two of the three variables—distance, time, and pace—and it calculates the third, plus projected finish times for common race distances.

Pace is the fundamental metric for runners. Whether you are training for your first 5K, chasing a Boston Marathon qualifying time, or simply tracking your daily jogs, understanding your pace helps you plan workouts, set realistic goals, and execute race-day strategy. Running too fast at the start is the most common race mistake; a pace calculator helps you stay disciplined.

This tool is also useful for coaches, race directors, and fitness enthusiasts who want to convert between pace and speed, or project how a training pace translates to race results.

How to use it

  1. Enter your distance (e.g. 5K, 10K, half marathon, marathon, or a custom distance).
  2. Enter your finish time (hours:minutes:seconds) or your target pace (min:sec per mile/km).
  3. The calculator solves for the missing variable and shows projected finish times for standard race distances.

Formulas used

  • Pace = Total time / Distance Example: 25:00 for 5K (3.107 mi) → 25 / 3.107 = 8:03/mile

  • Time = Pace × Distance Example: 9:00/mile × 13.1 miles = 1:57:54 half marathon

  • Speed = 60 / Pace (in min/mile) → mph Example: 8:00/mile → 60 / 8 = 7.5 mph

  • Pace from speed: Pace = 60 / Speed (mph) → min/mile Example: 6.2 mph → 60 / 6.2 = 9:41/mile

  • Standard race distances: 5K = 3.107 miles. 10K = 6.214 miles. Half marathon = 13.109 miles. Marathon = 26.219 miles.

Examples

Example 1 — 5K runner: Time = 28:30. Pace = 28.5 / 3.107 = 9:10/mile (5:42/km). Speed = 6.54 mph. Projected 10K at same pace: 56:58. Half marathon: 2:00:18.

Example 2 — Marathon goal: Target = 4:00:00 marathon. Pace = 240 / 26.219 = 9:09/mile. Speed = 6.55 mph. Required 5K pace: 28:29. Required half marathon: 2:00:00.

Example 3 — Speed to pace conversion: Treadmill set to 8.0 mph. Pace = 60 / 8 = 7:30/mile (4:39/km). At this pace: 5K = 23:19. 10K = 46:38. Half marathon = 1:38:19.

Tips and common mistakes

  • Negative splits win races. Running the second half faster than the first is the most efficient race strategy. Start 10–15 seconds per mile slower than goal pace and pick it up after the halfway point.
  • Training paces differ from race pace. Most training runs should be 60–90 seconds per mile slower than your race pace. Running every run at race pace leads to burnout and injury.
  • Elevation matters. Uphill sections slow your pace by 15–30 seconds per mile per 1% grade. Downhill may speed you up by 10–20 seconds. Adjust expectations for hilly courses.
  • Pace per mile ≠ pace per km. To convert: pace per km × 1.609 = pace per mile. A 5:30/km pace equals roughly 8:51/mile.
  • GPS watches can be inaccurate on curvy or tree-covered paths. Tangent running (taking the shortest line around curves) helps match your GPS to the actual course distance.
  • Treadmill pace is controlled, so it eliminates wind, terrain, and pacing variability. Most runners find outdoor running 10–30 seconds per mile slower than their treadmill pace.

Common questions

How do I calculate my running pace?

Divide total time by distance. For example, 30 minutes for 3 miles = 10:00 min/mile pace. The calculator converts between pace, speed, distance, and time.

What is a good running pace for beginners?

A 10–12 min/mile (6:15–7:30 min/km) pace is typical for beginner runners. Focus on consistency and gradually improving rather than hitting a specific pace.