Pace Calculator
Find your running pace, predict your race finish time, or work out the distance you can cover at a given pace — for 5K, 10K, half marathon, marathon, ultra, or any custom distance. Get min/mile, min/km, mph and kph with mile-by-mile and km-by-km splits. Runners, walkers, cyclists and swimmers welcome.
Pick a mode — find pace from distance & time, finish time from pace, or distance from time & pace. Choose a preset race distance or enter your own, and the calculator shows results in every common unit plus mile/km splits.
| Split | Cumulative Distance | Cumulative Time |
|---|
| Race | Distance | Finish Time at This Pace |
|---|
* Pace and finish-time predictions assume an even, constant pace across the full distance — real races vary with terrain, weather, fatigue, fueling and pacing strategy. Race-time predictions across distances are simple extrapolations from your current pace, not physiology-based models. Use these figures as planning estimates and adjust against your actual training data and race experience.
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What Is a Pace Calculator?
A pace calculator is a free online tool that turns the relationship between distance, time, and pace into instant answers for any one of the three. Know two of them and you get the third. It's the single most useful tool in any runner's planning kit — for setting race-day targets, working out treadmill speeds, planning long-run pacing, and converting between min/mile and min/km when you travel.
Our pace calculator handles all three calculation modes, supports every common distance from 1,500 m up to ultras (5K, 10K, 15K, half marathon, marathon, 50K, 100K, 100 miles), and any custom distance. It outputs min/mile, min/km, mph, and kph at the same time, plus split times every kilometer, mile, or 400 m (track lap), and predicts your race times at common distances based on the pace you enter.
How to Use This Pace Calculator
- Pick a mode — pace, finish time, or distance.
- Choose a distance preset — 5K, 10K, half marathon, marathon, ultra — or enter a custom distance in km, miles, meters, or yards.
- Enter time or pace — depending on the mode. Hours/minutes/seconds for time; minutes/seconds per mile or per km for pace.
- Pick a split interval — 1 km, 1 mile, 400 m (track lap), or none.
- Read your result — pace per mile, pace per km, mph/kph, plus split times and race-time predictions.
How to Calculate Pace, Time and Distance
All running pace math sits on one triangle of three formulas:
Time = Pace × Distance
Distance = Time ÷ Pace
Example 1 — find your pace: you run a 5K in 25 minutes. Pace = 25 min ÷ 5 km = 5:00 min/km (or about 8:03 min/mile, or 7.46 mph).
Example 2 — find your finish time: you can hold 9:09 min/mile for a marathon (26.219 mi). Time = 9.16 min/mi × 26.219 = ~4 hours.
Example 3 — find distance: you ran 46 minutes at 9:12 min/mile. Distance = 46 ÷ 9.2 ≈ 5 miles.
Pace Conversion Chart (Min/Mile ↔ Min/Km ↔ Mph ↔ Kph)
Travelling for a race, switching between treadmill and outdoors, or running with someone from a different country? Here are common conversions:
| Min/Mile | Min/Km | Mph | Kph |
|---|---|---|---|
| 6:00 | 3:44 | 10.0 | 16.1 |
| 7:00 | 4:21 | 8.6 | 13.8 |
| 8:00 | 4:58 | 7.5 | 12.1 |
| 9:00 | 5:35 | 6.7 | 10.7 |
| 10:00 | 6:13 | 6.0 | 9.7 |
| 11:00 | 6:50 | 5.5 | 8.8 |
| 12:00 | 7:27 | 5.0 | 8.0 |
| 13:00 | 8:04 | 4.6 | 7.4 |
Target Paces for Popular Race Finish Times
| Race | Finish Goal | Required Pace (min/mile) | Required Pace (min/km) |
|---|---|---|---|
| 5K | Sub-25:00 | 8:03 | 5:00 |
| 5K | Sub-20:00 | 6:26 | 4:00 |
| 10K | Sub-50:00 | 8:03 | 5:00 |
| 10K | Sub-40:00 | 6:26 | 4:00 |
| Half Marathon | Sub-2:00 | 9:09 | 5:41 |
| Half Marathon | Sub-1:30 | 6:52 | 4:16 |
| Marathon | Sub-4:00 | 9:09 | 5:41 |
| Marathon | Sub-3:30 | 8:00 | 4:58 |
| Marathon | Sub-3:00 | 6:52 | 4:16 |
Pace for Walking, Cycling and Swimming
The same formula works for any human-powered movement, so this tool isn't just for runners:
- Brisk walking pace: typically 15–20 min/mile (3–4 mph).
- Recreational cycling: often 10–15 mph; experienced riders cruise 18–22 mph.
- Swimming: usually expressed per 100 m or 100 yd; enter your pool length as a custom distance.
Pacing Strategy: Why Even Splits Win
The fastest way to run any race over 800 m is usually even splits — covering each segment at roughly the same pace, or running the second half marginally faster than the first (a "negative split"). Going out too fast almost always costs you more time at the end than you gained at the start. Our calculator's split table gives you a clear, even-split target for every mile or kilometer of the race.