How do I convert between min/km and min/mile?

Multiply min/km by 1.609 to get min/mile. So 5:00 /km = 8:03 /mile. The calculator shows both.

What's a good 5K pace?

Highly variable — recreational runners average 6:00–7:00 /km (30:00–35:00 5K). Sub-25:00 (5:00 /km) is intermediate. Sub-20:00 (4:00 /km) is competitive amateur. Elites run sub-13:00 (2:36 /km).

Running Pace Calculator

Pace, speed, and split times from any distance + time — works for both km and miles.

Result

Pace per km

5:00 /km

8:03 /mi · 12.00 km/h · 7.46 mph

Projected 1 km5:00
Projected 1 mi8:03
Projected 5 km25:00
Projected 10 km50:00
Projected Half-marathon (21.1 km)1:45:29
Projected Marathon (42.2 km)3:30:59

How to use this calculator

Enter the distance you ran and how long it took.
Pace shows in both per-km and per-mile, plus speed in km/h and mph.
Projected splits assume you hold this pace — in reality marathon pace ≈ 10K pace + 30 s/km.
For an interval target (e.g. 400 m at 4:00 km), divide the per-km pace.

About this tool

Pace is how runners actually talk: "I ran a 4:30 km" means much more than "I ran 13.3 km/h." This calculator converts between distance, time, and pace — and projects what your race times would be at that pace, from 1 km up to a full marathon. Useful for setting realistic goals (if you can hold a 5:00 km for 5 km, can you do it for 10? — usually no, marathon pace is about 30 sec/km slower than 10 km pace) and for designing interval workouts ("I need to do 8×400 m at 4:00 km pace").

Frequently asked

The projection is a "naïve" linear extrapolation. Real-world fade from glycogen depletion, heat, and form breakdown adds 5–15 % to marathon time vs. predicted from a 10K. Use Riegel's formula for a more realistic estimate at long distances.