To break two hours for the half marathon – which is 13.1 miles, or 21.1km – you’ll need to run at a pace of 9:10 min/mile, or 5:41 min/km. If you’re able to hold that pace for double the distance, you’ll be a sub-4 marathoner!
Feet Per Minute to Miles Per Minute (ft/min to mi/min) calculator, conversion table and how to convert