This free running pace calculator finds your pace per kilometre, pace per mile, speed in km/h, and speed in mph from any distance and finish time. Enter your distance, select kilometres or miles, enter your time in hours/minutes/seconds, and the pace calculator returns all four measurements instantly. Use it to figure out running pace from a recent run, to calculate race pace for an upcoming event, or to determine running pace targets for training sessions across any distance from a 5K to a full marathon.
This online pace calculator is the fastest way to convert between pace, speed, and any running format β no manual division required, no confusing unit conversions, just instant answers in every format you need.
What Is Running Pace and Why Does It Matter?
Running pace is the time it takes to cover one unit of distance β expressed as minutes per kilometre (min/km) or minutes per mile (min/mi). It is the most practical measurement for runners because it answers the most useful planning question directly: how long will this distance take me? A speed figure (km/h or mph) tells you the same information from a different angle, but pace is how runners naturally plan and communicate effort.
Knowing your pace transforms aimless running into structured training. Easy runs, tempo runs, threshold intervals, and race pace all correspond to specific pace ranges β and hitting the right pace for each workout type is what drives improvement. Runners who figure out running pace from their runs and set zone-based targets improve faster than those who simply run without structure. As World Athletics marathon data confirms, even elite marathon runners race within a narrow, pre-planned pace band β the discipline to determine running pace precisely before race day is a skill that separates finishers from personal-best setters at every level.
How to Use This Running Pace Calculator
- Distance β enter the distance you ran or plan to run.
- Unit β select kilometres or miles.
- Time β enter your finish time in hours, minutes, and seconds.
- Click Calculate Pace β pace per km, pace per mile, km/h, and mph all appear instantly.
Use the calculator forward (entered a known time for a known distance to find pace) or backward (use target pace to determine how fast you need to run a given distance). This pace calculator works for any distance and any time β from a 400m track rep to an ultramarathon. It is the equivalent of the pace calculator runner’s world and mcmillan pace calculator provide, built directly into your browser without requiring registration or a separate app.
Marathon Pace Calculator β Plan Your 26.2
The marathon pace calculator function is one of the most-used features of any running tool. To calculate pace for marathon racing: enter 42.195 km (or 26.2 miles) and your goal finish time. The result shows the exact pace per kilometre and per mile you need to maintain throughout the race. This marathon race pace calculator approach is fundamental to avoiding the most common marathon mistake β going out too fast.
Reference points from this marathon pace estimator for common goal times:
- Sub-3:00 marathon requires approximately 4:15/km (6:50/mile)
- 3:30 marathon requires approximately 4:58/km (8:00/mile)
- 4:00 marathon requires approximately 5:41/km (9:09/mile)
- 4:30 marathon requires approximately 6:24/km (10:18/mile)
- 5:00 marathon requires approximately 7:06/km (11:27/mile)
Enter your specific goal time into this marathon running calculator to get your exact personal target. Use it as a marathon pace table reference during training β running at your goal marathon pace in long runs and tempo sessions is the most direct preparation for race day performance.
Marathon Split Calculator and Pace Chart
This marathon split calculator function extends naturally from the base pace calculation. Once you know your pace per kilometre from the marathon pace calculator, multiply by any distance segment to find your expected split time. For a 5 km segment at 5:00/km: 5 Γ 5 = 25:00. For a half-marathon (21.1 km) split at 5:00/km: 21.1 Γ 5 = 1:45:30.
This marathon pace converter also lets you work in either unit system β calculate your pace in min/km and the tool simultaneously shows the equivalent marathon race pace chart values in min/mile. For a full marathon pace chart reference, the half marathon split calculator built into the results lets you verify that your target half-marathon split time puts you on course for your goal finish. Use the marathon pace table perspective: if your goal is 4:00 marathon, your half split should be approximately 1:59:45 to run even halves.
5K Pace Calculator and Half Marathon Pace Chart
For shorter events, this 5k pace calculator shows the pace required for any 5K goal time. Enter 5 km (or 3.1 miles) and your target time to see the pace you need to hold. For the half marathon pace calculator function, enter 21.1 km (or 13.1 miles) and your goal. Common reference points:
- 5K pace calculator β sub-20:00: requires 4:00/km (6:26/mi)
- 5K pace calculator β 25:00: requires 5:00/km (8:03/mi)
- Half marathon pace calculator β sub-2:00: requires 5:41/km (9:09/mi)
- 10K race pace calculator β 50:00: requires 5:00/km (8:03/mi)
Use this 5k race pace calculator to set training targets for interval sessions β your 5K race pace is typically your threshold effort level, which is the most effective zone for speed development. The half marathon pace chart produced by these calculations gives you concrete numbers to aim for in tempo training runs, bridging the gap between your current fitness and your target race performance.
Convert Running Pace β Between km/h, mph, and Per-Mile Pace
This running pace calculator also functions as a pace converter for translating between any measurement system. To convert running pace from min/km to mph, the formula is: speed (mph) = 60 Γ· pace (min/mi). This convert pace calculation is done automatically β every result shows all four formats simultaneously. The mile pace calculator output is particularly useful for runners who train in kilometres but race in mile-marked events (or vice versa), and for calibrating treadmill settings which typically display speed in km/h or mph rather than pace.
The race pace converter function works for any distance: enter your recent 10K time to convert it to the equivalent marathon pace or half marathon pace using the same calculator, then compare your current fitness to your target pace. The half marathon pace converter result tells you whether your current training pace puts you on track for your goal half marathon time. For complementary fitness tracking, our BMI calculator and TDEE calculator pair naturally with running training. Browse all tools in our free tools hub.
Frequently Asked Questions
Enter your distance and time into this running pace calculator and click Calculate Pace. The tool divides total time by distance to produce pace per km and per mile, then converts to km/h and mph simultaneously. For example, running 10 km in 50 minutes gives a pace of 5:00 per kilometre (8:03 per mile) and a speed of 12 km/h (7.5 mph). This calculate race pace approach works for any distance and time combination.
To run a sub-4:00 marathon, you need to maintain approximately 5:41 per kilometre (9:09 per mile) for the full 42.195 km. Use this marathon pace calculator by entering 42.195 km and 3:59:59 as your goal time to see the exact required pace. For training, run your long runs at this pace or slightly slower, and use tempo runs at your 10K to half marathon pace to build the fitness needed to sustain marathon pace for four hours.
A “good” 5K pace depends entirely on your fitness level and experience. For reference: sub-20:00 (under 4:00/km) is competitive club-level performance; 25:00 (5:00/km) is solid recreational running; 30:00 (6:00/km) is a strong beginner target. Use this 5k pace calculator to find your current pace and set a realistic improvement goal β aim to reduce your pace by 10β20 seconds per km over a 8β12 week training block.
Multiply your pace in min/km by 1.609344 to get min/mile. For example, 5:00/km Γ 1.609 = 8:03/mile. This running pace calculator performs this convert running pace calculation automatically β every result shows both min/km and min/mile simultaneously, so you never need to do the conversion manually.
Once you know your target pace per km from the running pace calculator, multiply that pace (in minutes) by the distance of any segment to get the expected split time. For example, at 5:00/km, your 5 km split is 25:00, your 10 km split is 50:00, and your half marathon split is approximately 1:45:33. The marathon split calculator approach uses this same multiplication for each checkpoint along the race course.
No β this is one of the most common training mistakes. Most of your weekly running (approximately 80%) should be at an easy, conversational pace that builds aerobic base without accumulating fatigue. Only a small portion of training should be at race pace or faster. Calculate training paces for different session types: easy runs at 60β70% of race pace effort, tempo runs at 10Kβhalf marathon race pace, and intervals at 5K race pace or faster. This distribution produces better results than running every session at the same moderate effort.
Yes β completely free with no sign-up, no account, and no usage limits. All calculations run in your browser and nothing you enter is stored or transmitted. Use it for every training session, race goal calculation, and pace conversion you need.