acalculator

What is my running pace?

Enter any two of distance, time and pace. The calculator finds the third and shows your pace per mile and per kilometer, your finish time and your average speed.

Your numbers

Units
Type up to two parts, for example 3 h 30 min or 25 min 30 s.
For example 8 min 30 s.
Pace per
Pace
8:01

Covering 26.22 mi in 210 min is a pace of 8.01 min.

Pace
8.01 min
Finish time
3:30:00
Pace per mile
8:01
Pace per kilometer
4:59
Average speed
7.49 mph

Pace: 8:01. Covering 26.22 mi in 210 min is a pace of 8.01 min.

How to calculate

Computes running pace per mile or per kilometer from distance and time, or the finish time or distance from a pace, with the average speed.

Example with the default inputs (Distance 26.2187574564543 mi, Time 210 min, Pace per Mile): Covering 26.22 mi in 210 min is a pace of 8.01 min.

Formula: pace = time ÷ distance, with the distance in miles (1 mi = 1,609.344 m) or kilometers; speed = distance ÷ time.

  • The pace is the average over the whole distance, as if every mile or kilometer took the same time.
  • Finish time and paces are rounded to the nearest second for display.
  • The distance is at least 1 meter, and the time and the pace are at least 1 second.

Machine-readable copies: Markdown, JSON.

Worked examples

Each example is checked against the calculator on every build.

  1. Pace per Mile, Distance 26.22 mi, Time 210 min gives Pace 8.01 min, Pace per mile 8:01, Pace per kilometer 4:59, Finish time 3:30:00, Average speed 7.49 mph.Source: hand calculation in content.mdx: 12,600 s ÷ (42,195 ÷ 1,609.344) mi = 480.57 s = 8:01 per mile; 12,600 ÷ 42.195 = 298.61 s = 4:59 per km (World Athletics: marathon 42.195 km; NIST SP 811: 1 mi = 1,609.344 m)
  2. Pace per Kilometer, Distance 3.107 mi, Time 25 min gives Pace 5 min, Pace 5:00, Pace per kilometer 5:00, Pace per mile 8:03.Source: hand calculation in content.mdx: 1,500 s ÷ 5 km = 300 s = 5:00 per km; 300 × 1.609344 = 482.8 s = 8:03 per mile
  3. Pace per Mile, Distance 10 mi, Pace 8 min gives Time 80 min, Finish time 1:20:00.Source: hand calculation in content.mdx: 10 × 480 s = 4,800 s = 1:20:00
  4. Pace per Kilometer, Time 60 min, Pace 4 min gives Distance 9.321 mi.Source: hand calculation in content.mdx: 3,600 s ÷ 240 s per km = 15 km

How it works

Pace is the time it takes to cover one unit of distance, here one mile or one kilometer:

  • pace = time ÷ distance
  • time = pace × distance
  • distance = time ÷ pace

Pick Mile or Kilometer for the pace. The distance is converted to that unit first (1 mile = 1,609.344 m, 1 km = 1,000 m).

The calculator also shows:

  • the pace you chose, and the pace per mile and per kilometer, as minutes and seconds (m:ss),
  • the finish time, as h:mm:ss,
  • the average speed = distance ÷ time.

The clock values are rounded to the nearest whole second, with halves rounded up: 480.57 s and 480.5 s both show as 8:01. A value that rounds to less than one hour shows as m:ss (8:01); from 1:00:00 on it shows as h:mm:ss. So 3,599.4 s shows 59:59 and 3,599.5 s shows 1:00:00.

Assumptions

  • The pace is the average over the whole distance.
  • The distance is at least 1 meter, and the time and pace are at least 1 second.

Worked examples by hand

A marathon in 3:30:00. The marathon is 42.195 km = 42,195 ÷ 1,609.344 = 26.2188 miles. The time is 3.5 h = 12,600 s. Pace per mile = 12,600 ÷ 26.2188 = 480.57 s, which is 8:01. Pace per km = 12,600 ÷ 42.195 = 298.61 s, which is 4:59. Average speed = 42,195 ÷ 12,600 = 3.349 m/s = 7.49 mph.

A 5 km run in 25 minutes. Pace per km = 1,500 s ÷ 5 = 300 s = 5:00. Pace per mile = 300 × 1.609344 = 482.8 s = 8:03.

10 miles at 8:00 per mile. Time = 10 × 480 s = 4,800 s = 1:20:00.

How far an hour at 4:00 per km goes. Distance = 3,600 s ÷ 240 s per km = 15 km.

Other questions people ask

How do I calculate my running pace?

Divide your time by the distance. A 5 km run in 25 minutes is 25 ÷ 5 = 5 minutes per kilometer. A marathon in 3 hours 30 minutes is 210 ÷ 26.2188 = 8.01 minutes, about 8:01 per mile.

How do I work out my finish time from a pace?

Multiply the pace by the distance. Ten miles at 8:00 per mile is 10 × 8 = 80 minutes, or 1:20:00.

How do I convert pace per kilometer to pace per mile?

Multiply by 1.609344, because a mile is 1,609.344 meters. A 5:00 per km pace is 5 × 1.609344 = 8.05 minutes, which is 8:03 per mile. To go from per mile to per km, divide by 1.609344.

How long is a marathon?

A marathon is 42.195 km, which is 26.2188 miles. A half marathon is half of that: 21.0975 km or 13.1094 miles. A 10K is 10 km (6.2137 miles) and a 5K is 5 km (3.1069 miles).

How do I type a time like 3:30:00?

Type it with units, up to two parts, for example 3 h 30 min, 25 min 30 s, or 210 min. The result also shows the finish time and paces as h:mm:ss or m:ss.