Running Pace Calculator
Calculate running pace, time, or distance from any two of the three — with race-time projections for 5K, 10K, half marathon, and marathon.
That's a pace of 5:00/km (8:03/mi) at an average speed of 12.00 km/h (7.46 mph).
Race times at this pace
Results update as you type. Race projections assume even pace — real race times typically slow slightly over longer distances due to fatigue and hills.
Formula
Three identities: pace = time / distance,
time = pace × distance, and
distance = time / pace. The race
projections multiply your pace per kilometre by the four standard distances (5 km, 10 km,
21.0975 km, 42.195 km).
When this calculator is useful
Across the euro area running is almost entirely metric, and this calculator is built around minutes per kilometre and distances in kilometres while still offering the per-mile figure for anyone using a mile-based plan. Use it when you have finished a run and want your pace, when you are setting a goal time for a city race or an autumn marathon, or when you know only two of the three numbers — pace, time and distance — and need the third calculated.
It suits the questions runners across Europe actually ask: what pace do I need to break 50 minutes over 10 kilometres, if I hold 5:30 per kilometre how long will a half marathon take, what does my plan's 'easy 12 kilometres' come to in time. Working in kilometres throughout keeps it aligned with how races are measured and how almost every European running app reports your splits.
Understanding your result
Pace is the key figure: minutes per kilometre, the unit nearly every European race, app and training plan uses. The finish-time projection then multiplies that pace by the race distance, so holding 5:30 per kilometre over 42.195 kilometres projects to roughly 3 hours 52 minutes. The longer the race, the more even a small change in your per-kilometre pace shifts the finishing time.
Treat the projection as a goal-pace ceiling rather than a forecast. It assumes you run an even pace from start to finish, which real races rarely allow — expect to finish a little slower over 10 kilometres and below, and noticeably slower over the half and full marathon, once pace fade, elevation and refreshment stops are taken into account. The number is best for setting the splits you aim to hold.
A worked example
Suppose you run 10 kilometres in 50 minutes. That is a pace of exactly 5:00 per kilometre. Project that same pace to a half marathon and the pure arithmetic gives about 1 hour 45 minutes, though most runners would aim a fraction slower over the longer distance. For a full marathon at a more sustainable 5:20 per kilometre, the projection lands near 3 hours 45 minutes. If you follow a mile-based plan, 5:20 per kilometre converts to roughly 8:35 per mile — the calculator shows both, so switching systems never costs you a calculation.
Points to be careful about
Most pacing slip-ups across the euro area come from an over-ambitious target or misreading what the arithmetic assumes.
- Setting off faster than your goal pace and fading later — the projection assumes the even pace you actually have to sustain.
- Reading a per-mile figure as though it were per kilometre, which makes a pace look far easier or harder than it is.
- Overlooking elevation, summer heat and aid-station stops, all of which cost time the pure calculation never includes.
- Assuming a marathon is your 10-kilometre pace simply held for longer — endurance fades faster than the distance multiplies.
Pacing for European city marathons
European distance running revolves around its great metric city races — Berlin, famous as one of the fastest marathon courses in the world and a regular setting for world records, alongside Paris, Amsterdam, Valencia and many more. These are measured and timed entirely in kilometres, with pace bands, signage and clocks all metric, so a per-kilometre goal pace maps directly onto what you will see on the course.
A sound approach is to take a recent shorter race, set your per-kilometre pace from it, then project the longer distance while easing the target slightly for fatigue. Keep the calculator in kilometres to match European races and apps, and use the per-mile figure only when a plan written in the British or American tradition calls for it, so your splits always line up with the clock on the road.
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Frequently asked questions
What's a normal running pace?▾
It varies hugely. A casual jog for most adults is 7:30–9:00/km (~12–14 min/mile). Recreational running is 5:30–6:30/km. Competitive club running is under 4:30/km. Elite marathon pace is around 2:50/km. Compare to your own previous runs — absolute averages are less useful than tracking a personal trend.
How accurate are race-time projections?▾
The calculator multiplies pace by distance — a pure arithmetic projection assuming even pace throughout. Real race times typically run 2–5% slower than projected for 10K and below, 5–10% slower for half-marathon and marathon, due to pace fade, hills, weather, and aid stops. The Riegel formula (T2 = T1 × (D2/D1)^1.06) is a more realistic projection if you have a recent shorter race time.
Why does the calculator show pace per km AND per mile?▾
Because runners across Europe use both. Almost all races and most apps default to km, but mile-based pace is common for treadmills, US-format training plans, and athletes who came from the British tradition. Showing both removes a conversion step.
Can I plan a marathon from this?▾
It gives you a goal pace and projected time, but a marathon requires a training plan, not just a calculator. Established plans (Pfitzinger 12-week, Hansons, Higdon) prescribe weekly mileage, long runs, tempo runs, and intervals. The pace calculator's job is to set the target — race-day preparation is what actually delivers it.
How do I convert minutes per mile to minutes per km?▾
Divide minutes per mile by 1.609 (or multiply by 0.6214). 8:00/mi = 4:58/km. 10:00/mi = 6:13/km. The result above shows both at once, so you don't need to do the maths if you switch between pace systems mid-training.
Should I train at goal race pace?▾
Most evidence-based marathon plans have you training at race pace for only 10–25% of weekly volume. The bulk is easy aerobic running — much slower than race pace — with smaller doses of tempo and interval work. All-out training plateaus faster than mixed training and dramatically increases injury risk.