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Running Pace Calculator
Calculate your running pace (min/mile or min/km), race finish time, or required pace to hit a goal time. Works for 5K, 10K, half marathon, and marathon distances.
Distance
Finish time
::
Pace per kilometre
-- min/km
Pace per mile
-- min/mi
Finish time
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How to use the Running Pace Calculator
Select your race distance
Choose from the preset buttons — 5K, 10K, Half Marathon, Marathon — or select Custom to enter any distance in km or miles.
Enter your finish time
Type your time into the H:MM:SS fields. The cursor moves automatically from hours to minutes to seconds as you type. You can leave hours as 0 for shorter races.
Switch between km and miles
Use the km/miles toggle to switch how your pace and splits are displayed. The splits table updates instantly to show per-kilometre or per-mile breakdowns.
Use the race predictions
The 'Equivalent race times' section uses Riegel's formula to predict your likely finish time at other distances based on your current input. Useful for setting goals across different race formats.
About this Running Pace Calculator
Your running pace — the time it takes to cover one kilometre or one mile — is the most fundamental metric in distance running. Knowing your pace helps you run at the right intensity during training, set realistic race goals, and avoid going out too fast and hitting the wall. Our running pace calculator converts between time, pace, and distance, so you always know exactly where you stand. For marathon training specifically, pace management is critical. Running even 10–15 seconds per kilometre too fast in the first half can cost you minutes (or a DNF) in the final miles. The splits table shows your projected time at every kilometre or mile marker — perfect for writing a pace band or memorising key checkpoints before race day. The race prediction section uses Riegel's formula: T2 = T1 × (D2/D1)^1.06. It's a widely-used mathematical model developed by Pete Riegel in 1977 that extrapolates your predicted finish time at one distance based on your performance at another. It's reliable for recreational runners between 5K and marathon distance.
Frequently Asked Questions
Divide your total run time (in minutes) by the distance covered. For example, running 3 miles in 27 minutes = 27 ÷ 3 = 9:00 min/mile pace.
A comfortable beginner pace is typically 10–14 minutes per mile (6:12–8:42 min/km). The most important thing is to run at a conversational pace where you can speak in short sentences.
Divide 60 by your pace in minutes per mile. For example, a 10:00 min/mile pace = 60 ÷ 10 = 6 mph. Our calculator shows both pace and speed simultaneously.
A realistic first marathon goal for most beginners is finishing under 5 hours, which requires an average pace of around 11:27 min/mile (7:07 min/km). Many coaches recommend training to run at a comfortable conversational pace and focusing on finishing before worrying about time.
Riegel's formula (T2 = T1 × (D2/D1)^1.06) predicts race times at one distance based on your performance at another. Published by Peter Riegel in 1977, it's reasonably accurate for distances between 5K and 50 miles. It tends to slightly overestimate finishing times for elite athletes at longer distances, but is reliable for recreational runners.