Speed conversion

4 mph to Pace per Km & Mile

4 mph is 9:19 per km and 15:00 per mile (6.44 km/h · 4.00 mph). Here is every conversion, race finish times at this pace, and what it means for your training.

Per km
9:19
min/km
Per mile
15:00
min/mile
Speed
6.44
km/h · 4.00 mph
Track lap
3:44
per 400 m · 1.79 m/s

Convert any other pace instantly with the pace converter →

Race times at 4 mph

DistanceFinish time
1 km9:19
1 mile15:00
5K46:36
10K1:33:12
Half marathon3:16:38
Marathon6:33:17

Kilometre splits

KmElapsedKmElapsed
19:19655:55
218:3871:05:15
327:5881:14:34
437:1791:23:53
546:36101:33:12

What kind of pace is 4 mph?

Whether 4 mph is fast or easy depends entirely on how far you run it. The table treats it as your race pace for each distance and shows the fitness (VDOT) that implies, the marathon that fitness supports, and the easy pace such a runner would use in training.

If it is your…FinishVDOTEasy pace /kmEquivalent marathon
5K race pace46:36outside the VDOT model range
10K race pace1:33:12outside the VDOT model range
Half marathon race pace3:16:38outside the VDOT model range
Marathon race pace6:33:1720.211:12–10:176:33:17
Finish times at 4 mph
Holding the same pace for longer is what makes longer races hard — most runners run a marathon 30–60 seconds per km slower than their 5K pace.

On the treadmill

Set the belt to 6.4 km/h (4.0 mph). Most treadmills adjust in 0.1 steps, so you may need to round. For outdoor-equivalent effort at this speed, many runners add a 1 % incline — see the treadmill pace calculator for the effect of any incline.

Nearby paces

Same pace in other units

  • 9:00/km — the closest per-km pace page
  • 15:00/mi — the closest per-mile pace page
  • 6.5 km/h — the closest km/h speed page

Planning a race at this pace? Build splits with the pace calculator or the marathon pace calculator, and find training paces with the VDOT calculator.

1 mile = 1.609344 km. VDOT from Daniels & Gilbert (1979). Last reviewed September 2026.

FAQ

4 mph: questions

4 mph equals 9:19 per km and 15:00 per mile — a speed of 6.44 km/h or 4.00 mph.

At 4 mph you would finish 5K in 46:36, 10K in 1:33:12, a half marathon in 3:16:38 and a marathon in 6:33:17.

It depends on the distance. As a 5K race pace, 4 mph corresponds to a VDOT of about 17.9; as a marathon race pace it corresponds to about 20.2. For comparison, many regular recreational runners race 5K somewhere around VDOT 30–45.

Set the treadmill to 6.4 km/h or 4.0 mph. Adding a 1 % incline roughly matches the effort of running the same pace outdoors at moderate to fast speeds.