Calculate your running or walking pace, total time, or distance. Enter any two values to find the third. See projected finish times for common race distances based on your pace.
Pace is the language of running. While speed (miles per hour) makes sense for cars, runners think in minutes per mile or minutes per kilometer because pace times the distance gives the finish time directly. A 9:00 min/mile pace over 26.2 miles is a 3:55:30 marathon — no extra math required.
This calculator handles all three sides of the pace/time/distance relationship: enter any two, get the third. It also projects finish times for common race distances (5K, 10K, half marathon, marathon) based on your input pace, useful for setting target paces in training or seeing how your easy-run pace would translate to a race.
The same math applies to walking, cycling, swimming, and any constant-speed effort. The "good pace" benchmarks differ by sport — what's slow for a runner is fast for a walker — but the conversion formula is identical.
Goal pace: 9:00 min/mile Distance: 26.2 miles (marathon) Finish time: 26.2 × 9 = 235.8 minutes = 3:55:48 For most amateur runners, sub-4-hour marathon is a major milestone. Sub-3 takes serious training; sub-2:30 is competitive.
Recent 5K time: 22:30 (7:15 min/mile pace) Projected at the same pace: 10K: 45:00 Half marathon: 1:34:55 Marathon: 3:09:51 Real race times slow at longer distances due to glycogen depletion and pacing fatigue. Common adjustments: +5–10 seconds per mile for 10K, +20–30 sec for half, +30–60 sec for marathon.
Use this for training pace planning, race goal projection, treadmill workouts, and pace-grouping in group runs. The calculator works for any sport with constant-speed movement; just remember "pace" conventions differ — runners use min/mile, cyclists use mph or km/h, swimmers use seconds per 100 yards/meters.
For predicting race times from training paces, use known finish-time conversion formulas (Riegel's formula is a common one: T2 = T1 × (D2/D1)^1.06). For heart-rate-based training zones, see the heart rate zone calculator.
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Estimate your VO2 max from running test data.
Calculate your one-rep max from weight and reps using Brzycki and Epley formulas.
Pace
8:04 /mile
Speed
7.44 mph
Total Time
25:00
| Race | Miles | Projected Time |
|---|---|---|
| 1 Mile | 1 | 8:04 |
| 5K | 3.107 | 25:03 |
| 10K | 6.214 | 50:07 |
| Half Marathon | 13.109 | 1:45:43 |
| Marathon | 26.219 | 3:31:27 |