This calculator gives a general estimate for adults and is not medical advice. Talk to a doctor or a registered dietitian before making health decisions.
How it works
Pace is time divided by distance; speed is distance divided by time. Runners usually think in pace, cyclists in speed.
5 km: 5 km (3.11 mi)
10 km: 10 km (6.21 mi)
Half marathon: 21.0975 km (13.1 mi)
Marathon: 42.195 km (26.2 mi)
To plan a race, divide your target time by the distance: a 4-hour marathon needs a pace of 5:41 per kilometre or 9:09 per mile.
Common questions
How do I convert pace per km to pace per mile?
Multiply by 1.609. A 5:00 per km pace is 8:03 per mile.
What is a good 10K time?
For recreational runners, under 60 minutes is a common goal; 50 minutes is a strong amateur time.