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Calculation Machine

Running Pace Calculator

Pace, finish time and splits for any distance.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Pace per mile
8:24
Pace per km
5:13
Speed
7.15 mph
Finish time
1h 50m 0s
RaceProjected time at this pace
5K26:05
10K52:11
Half marathon110:05
Marathon220:10

Quick answer

Pace equals total time divided by distance; multiply pace by distance to project a finish time for any race.

The formula

Pace = time ÷ distance

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Distance13.1 miles
  • Time — hours1
  • minutes50
  • seconds0

Result

  • Pace per mile8:24
  • Pace per km5:13
  • Speed7.15 mph
  • Finish time1h 50m 0s

How to use the Running Pace Calculator

  1. 1Enter the distance you ran or plan to run.
  2. 2Enter the time in hours, minutes and seconds.
  3. 3Read pace and equivalent race times.

Frequently asked questions

Are the projections realistic?

They assume equal effort across distances. In practice, marathon pace is typically 10–15 seconds per mile slower than a straight scale-up.

What is a good 5K time?

Around 30 minutes for a recreational beginner, 22–25 for a regular runner and under 20 for a competitive club runner.

About this calculator

Pace, speed and finish times

Pace is time per distance (minutes per kilometre or mile), speed is distance per time. Runners usually think in pace because it is easy to check against a watch every kilometre. The calculator converts between them and predicts finish times for any distance at the same pace.

Even pacing is the most efficient way to race. Starting 10–15 seconds per kilometre too fast usually costs more time later than it saved.

Example

A 50-minute 10 km is 5:00 per km, or 12 km/h. Holding that pace for a half marathon (21.1 km) gives 1:45:30, though most people slow slightly over the longer distance.

Using pace on race day

  • Run the first kilometre a few seconds slower than goal pace.
  • Hills and heat slow pace — judge effort, not the watch, on those days.
  • GPS can drift on tight courses; use course markers to check.

Sources

More questions

What is a good 5K pace for beginners?

Many new runners finish a 5K between 6:00 and 8:00 per km. Any pace you can sustain is a good start.

How do I convert min/km to min/mile?

Multiply by 1.609. A 5:00/km pace is about 8:03 per mile.