Running Pace Calculator
Calculate your running pace, finish time, or distance instantly. Get race time predictions for 5K, 10K, half marathon, and marathon. Supports km and miles..
Added May 13, 2026
Input
In the unit selected above.
Result
Enter a value for calculate to see your result.
How it works
Calculates running pace, finish time, or distance from any two known values. Also predicts finish times for common race distances (5K, 10K, half marathon, marathon) at the given pace.
Formula
Pace = Time ÷ Distance | Time = Pace × Distance | Distance = Time ÷ Pace
- Pace
- Minutes per km or per mile
- Time
- Total run duration in seconds
- Distance
- Run length in km or miles
Step by step
- 01Choose what you want to calculate: pace, finish time, or distance.
- 02Enter the two known values — distance, time (h / min / sec), or pace (min + sec).
- 03Read your result and the equivalent speed in km/h or mph.
- 04Check the race prediction table for projected finish times at common distances.
Examples
5 km in 25:00 → pace and race predictions
Pace = 25 min ÷ 5 km = 5:00 /km, equivalent to 12.0 km/h.
Inputs
- Calculate:
- pace
- Distance unit:
- km
- Distance:
- 5
- Time — hours:
- 0
- Time — minutes:
- 25
- Time — seconds:
- 0
Result
- Result:
- 5:00 /km
- Equivalent speed:
- 12.0 km/h
Marathon at 5:30 /km → finish time
Time = 5.5 min/km × 42.195 km = 232.07 min ≈ 3:52:04.
Inputs
- Calculate:
- time
- Distance unit:
- km
- Distance:
- 42.195
- Pace — minutes:
- 5
- Pace — seconds:
- 30
Result
- Result:
- 3:52:04
Frequently asked questions
What is running pace?
Running pace is the time it takes to cover one unit of distance — usually expressed as minutes per kilometer (min/km) or minutes per mile (min/mi). A pace of 5:00 /km means you run one kilometer every five minutes.
How do I calculate my pace from a race result?
Divide your total finish time by the distance. For a 5K finished in 25:00, pace = 25 min ÷ 5 km = 5:00 /km. This calculator does that automatically — select 'Pace', enter your distance and time, and read the result.
What pace do I need to finish a marathon in 4 hours?
A sub-4 hour marathon (42.195 km) requires a pace of about 5:41 /km or 9:09 /mi. Select 'Pace', enter 42.195 km (or 26.22 miles) and a time of 4:00:00 to see the exact target pace.
Are the race time predictions accurate?
They assume a perfectly even effort at the same pace for the full distance. Real races involve warm-up, fatigue, course elevation, and pacing variation, so treat predictions as targets rather than guarantees.