What is running pace?
Pace is the time it takes you to cover a fixed distance — minutes per mile or per kilometre. It is the lingua franca of training plans: easy runs, tempo work and intervals are all prescribed as paces, and race strategy is a pace decision.
How the calculator works
Enter any distance and finish time. The tool returns pace per mile and per kilometre, your speed in mph and km/h, even splits for every mile of the run, and a Riegel projection of your marathon time using the standard 1.06 fatigue exponent — the same model most race predictors use.
Common use cases
- Turning a 5K time trial into a marathon goal
- Checking whether a goal race pace matches current fitness
- Building even-split race plans
Formula & caveats
Pace = time ÷ distance. Riegel: T₂ = T₁ × (D₂/D₁)^1.06. Projections assume appropriate training for the longer distance — a 5K time alone does not make you marathon-ready.
Frequently Asked Questions
What is a good running pace?
Recreational runners average 9–11 minutes per mile; sub-8:00/mi is competitive in local races. Context matters more than any absolute number.
How accurate is the marathon projection?
Within a few percent if you have trained the mileage. It underestimates for runners jumping from 5K fitness to 26.2 without volume.
Should I run even splits?
Even or slight negative splits are statistically the fastest strategy for most runners — hence the split table.
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