Pace Calculator
Convert between pace, speed, and finish time for any race distance.
Quick answer
Running pace is time divided by distance (minutes per mile or kilometer). Multiply pace by distance to get finish time; divide a goal time by distance to get the pace you need. Speed is simply distance divided by time.
Pace per kilometer
5:30 /km
Per mile
8:51 /mi
Speed
10.9 km/h
5K at this pace
27:30
10K at this pace
55:00
Pace, speed, and predictions
Pace is time per distance — the runner's native unit. Projecting a 5K pace onto a marathon is optimistic: each doubling of race distance typically slows pace by about 6% (Riegel's rule), so use projections as ceilings, not targets.
Training paces
Most training should run 60–90 seconds per km slower than race pace — easy running builds the aerobic base that race pace spends. If every run is at race effort, the race stops improving.
Frequently asked questions
- How does the Pace Calculator work?
- Running pace is time divided by distance (minutes per mile or kilometer). Multiply pace by distance to get finish time; divide a goal time by distance to get the pace you need. Speed is simply distance divided by time.
- Is the Pace Calculator free to use?
- Yes. The Pace Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
Related calculators
BMI Calculator
Check your body mass index and see where it falls on the healthy range.
Calorie Calculator
Find your daily calorie needs for maintenance, cutting, or bulking.
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy method.
Pregnancy Calculator
Track pregnancy milestones week by week from your due date.