Running Pace Calculator
Solve for pace, time, or distance. Includes split tables for 5K through ultra distances. Works in miles or kilometers.
Result
| Distance | Time |
|---|---|
| 5K | 15:32 |
| 10K | 31:04 |
| Half Marathon | 1:05:33 |
| Marathon | 2:11:06 |
| 50K | 2:35:21 |
| 50 mi | 4:10:00 |
| 100K | 5:10:41 |
The pace formula
Pace = time ÷ distance, expressed in minutes per mile (or per km). The calculator solves any of the three (pace, time, distance) given the other two — useful for workout planning (“how long will my 6-mile easy run take?”), race goal setting (“what pace gets me a sub-4 marathon?”), and post-run analysis (“what was my actual pace?”).
Pace ranges by ability level
Approximate ranges for healthy adult runners on flat terrain:
- Walking: 18–22 min/mile (3–3.3 mph).
- Brisk walk / jog: 13–17 min/mile.
- Easy run (beginner): 11–13 min/mile.
- Easy run (intermediate): 9–11 min/mile.
- Tempo / threshold: 7–9 min/mile (most amateurs).
- 5K race pace (recreational): 7–9 min/mile.
- 5K race pace (competitive amateur): 6–7 min/mile.
- Marathon goal (recreational): 9–11 min/mile.
- Sub-3-hour marathon: 6:51 min/mile.
- Elite: 4:30–5:30 min/mile sustained for 5K to marathon distances.
Common race time targets
Recognized milestones recreational runners chase:
- Sub-30 5K: 9:39 min/mile.
- Sub-25 5K: 8:03 min/mile.
- Sub-20 5K: 6:26 min/mile (a serious recreational milestone).
- Sub-1-hour 10K: 9:39 min/mile.
- Sub-50 10K: 8:03 min/mile.
- Sub-2-hour half marathon: 9:09 min/mile.
- Sub-1:30 half: 6:51 min/mile.
- Sub-4-hour marathon: 9:09 min/mile (~30% of marathon finishers go sub-4).
- Sub-3:30 marathon: 8:00 min/mile (Boston Qualifier for some age groups).
- Sub-3-hour marathon: 6:51 min/mile (~5% of marathoners).
Race-day pacing strategy
For any race longer than a 5K, even or negative splits beat positive splits. Going out 10–15 seconds per mile too fast in the first half costs disproportionately in the second half — “banking time” doesn't work in distance running.
Common race-day pacing approach:
- Marathon: first 5–6 miles at goal pace + 5–10 sec, settle in for miles 6–18, push 18–22, hold on 22–26.
- Half marathon: even pace start to finish; small surge in last 5K if feeling good.
- 10K: settle into goal pace by mile 1, hold steady, push the last mile.
- 5K: hardest to pace because it's short. Aim to feel uncomfortable by mile 1, suffer through miles 2–3, sprint the final 400m.
Heat, terrain, and altitude
Real-world conditions slow your pace. Rough adjustments:
- Heat: above 60°F (15°C), each 5°F adds ~10–20 sec/mile to marathon pace. Hot races can slow you by 5–15%.
- Hills: each 1% grade adds ~10–15 sec/mile uphill, returns about half that downhill. Rolling courses are slower than flat overall.
- Altitude: above 5,000 ft, performance drops 1–2% per 1,000 ft (acclimatized) or 3–5% (unacclimatized).
- Wind: headwind costs significantly more than tailwind helps — running in wind is always slower, on average.
Speed: pace expressed differently
Cyclists usually think in mph or km/h. Quick conversions:
- 10 min/mile = 6 mph = 9.66 km/h
- 8 min/mile = 7.5 mph = 12.07 km/h
- 6 min/mile = 10 mph = 16.09 km/h
- 5 min/km = 12 km/h = 7.45 mph
- 4 min/km = 15 km/h = 9.32 mph
Pair this calculator with our Heart Rate Zone Calculator for training intensity targets, and the TDEE Calculator for daily calorie needs that match your training volume.