Running Pace Calculator
A running pace calculator that turns any distance and time into pace. Enter how far you ran and how long it took — get pace in min/km and min/mile plus speed in kph and mph, with both metric and imperial inputs. Works for 5K runs, marathons and everything between.
Result
| Pace (min/km) | |
| Pace (min/mile) | |
| Speed |
Formula & source
Speed (kph) = 3600 ÷ pace (sec/km)
1 mile = 1.60934 km
Source: pace is distance over time by definition; the mile conversion uses the international mile of exactly 1.60934 km. Unique to this page: all four units (min/km, min/mile, kph, mph) are computed from one input — no separate conversions needed.
Worked example (you can verify by hand)
Input: 5 km in 25:00 (1500 s).
- Pace: 1500 ÷ 5 = 300 s/km = 5:00/km
- Per mile: 300 × 1.60934 = 482.8 s = 8:03/mile
- Speed: 3600 ÷ 300 = 12.0 kph (7.5 mph)
Expected output: 5:00 /km · 8:03 /mile · 12.0 kph.
Limitations — what this cannot do
- GPS watches and phone apps typically err by 1–3% on distance; a track-measured time trial is the honest input.
- Hills, heat, altitude and wind change real-world pace — charts assume flat, sea-level, calm conditions.
- Predictions assume similar training and conditions; they are estimates, not guarantees.
Disclaimer: Estimates for training planning only, not medical advice. Consult a professional.
FAQ
What is a good running pace for a beginner?
Most beginners run easy miles around 6:30–8:00/km (10:30–13:00/mile). If you cannot hold a conversation, slow down — easy pace is the foundation everything else builds on.
Should I track pace in min/km or min/mile?
Use whatever your watch and training plan use. This calculator shows both, so a US plan in min/mile converts instantly to min/km for a metric watch.
Why does my treadmill pace differ from outdoor pace?
Treadmills estimate from belt speed and are often 5–10% optimistic; outdoor GPS has its own error. Use one source consistently for training.
How do I pace a race evenly?
Take your goal time, divide by distance for target pace, then run the first third slightly conservatively. The marathon pace calculator builds the split table for you.