Choose the target
Pace, finish time or distance.
Pick what you want to solve and fill the other two values. You also get speed and finish times at every common distance.
Open Running Pace →Pace, finish time or distance.
Time as mm:ss or hh:mm:ss; pace as mm:ss.
Splits from 5K to marathon at the same pace.
Use Manlin to reflect, plan and take your next step.

Five minutes per kilometre, which is 12 km/h.
That is the official half marathon distance; a full marathon is 42.195 km.