Running Pace Calculator
Convert between pace, speed, and race finish time — plan your 5K, 10K, half marathon, or marathon target.
What is Running Pace?
Running pace is the time it takes to cover a unit of distance — typically expressed as minutes per kilometre (min/km) or minutes per mile (min/mile). It is the inverse of speed: a faster runner has a lower pace number.
Pace is the most practical measure for runners because it tells you exactly how fast you need to run each kilometre or mile to hit a target finish time. Knowing your pace also helps you train at the right effort level — easy runs, tempo runs, and intervals each target different pace zones relative to your race pace.
Speed (km/h or mph) is simply the distance covered per hour. The conversion is: speed (km/h) = 60 ÷ pace (min/km).
Common Race Pace Benchmarks
| Race | Beginner finish time | Intermediate | Elite (amateur) |
|---|---|---|---|
| 5K | 35–45 min (7–9 min/km) | 25–35 min (5–7 min/km) | Under 20 min (<4 min/km) |
| 10K | 70–90 min | 50–70 min | Under 40 min |
| Half Marathon | 2:30–3:00 hr | 1:50–2:30 hr | Under 1:30 hr |
| Marathon | 5:00–6:00 hr | 3:30–5:00 hr | Under 3:00 hr |
Worked Examples
Example 1: Marathon at 5:30 min/km pace.
Total time = 5:30 × 42.195 = 232 min 4 sec ≈ 3:52:04. Speed = 60 ÷ 5.5 = 10.9 km/h.
Example 2: Target a 25-minute 5K.
Required pace = 25 min ÷ 5 km = 5:00 min/km = 12 km/h.
Example 3: Half marathon finish time 1:45:00.
Required pace = 105 min ÷ 21.0975 = 4.977 min/km ≈ 4:59 min/km = 12.1 km/h.
Frequently Asked Questions
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For absolute beginners, a conversational easy pace of 7–9 min/km (11–14 min/mile) is ideal. You should be able to hold a full conversation while running. Speed is secondary to consistency — building the habit of regular running is more important than pace in the early stages.
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Multiply your pace in min/km by 1.60934 to get min/mile. For example, 5:00 min/km × 1.60934 = 8:03 min/mile. Conversely, divide min/mile by 1.60934 to get min/km.
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The three most effective methods are: (1) increasing weekly mileage at easy effort to build aerobic base; (2) tempo runs at slightly uncomfortable "comfortably hard" pace to raise lactate threshold; (3) interval training at 5K pace or faster to develop speed and VO2max. Most training plans recommend 80% easy, 20% quality efforts.
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A conservative first marathon strategy is to run 10–15% slower than your half marathon pace. This helps avoid the "wall" at miles 18–20. If you've run a 2:00 half marathon (5:41 min/km), aim for your first marathon at around 6:10–6:20 min/km pace.
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Negative splitting means running the second half of a race faster than the first. It is widely considered the optimal race strategy: starting conservatively conserves glycogen and delays fatigue, allowing you to finish strong. Most world marathon records are set with a near-even split or slight negative split.