Show HN: Mile Pace Calculator, free pace and split tools for runners

The mile pace calculator divides your running time by distance to find your average minutes per mile. You can also calculate finish time or distance when you know the other two values, then check your speed in miles per hour and plan splits. Whether you’re checking a one-mile effort or a longer run, the examples below show which numbers you need and how to read your result.

Time above is running time. Delay only adds to elapsed time; it never changes your running pace.

Mile pace always stays visible. Precision is a display preference, not a prediction of performance.

Enter your distance and time. We'll take care of the numbers.

Enter your run details to place your pace on the reference scale.

Please enable JavaScript to use the interactive calculator. The formulas below explain how to calculate pace manually.

One loop represents your entire run, not a measured 400-meter track or a real route. Segment lengths represent distance.

Enter a valid split interval to see your track. Your main pace result stays available.

Finish times if you hold this exact pace.

These are arithmetic projections, not race predictions. Holding the same pace over a longer distance may not be realistic.

Times are calculated before rounding. Rounded segment times may differ slightly from the rounded total.

This independent comparison does not change your run.

Your average pace per mile is your total time divided by the number of miles you covered. For instance, if you run five miles in 40 minutes, each mile takes eight minutes on average, so your result is 8:00 per mile. A smaller time per mile means you’re covering the same distance faster.

Pace = total time ÷ distance Finish time = pace × distance Distance = total time ÷ pace

For a calculation by hand, changing the total time to seconds makes the division easier: four miles in 35 minutes is 2,100 seconds divided by four, giving 525 seconds per mile. That’s 8 minutes 45 seconds, written as 8:45/mi.

The units follow your distance: time divided by miles gives minutes per mile, while time divided by kilometers gives minutes per kilometer. A result in a “per mile” field is a duration, such as 8:45, and labels like min/mi, mile pace and minutes per mile describe that same measure.

You need two values to calculate the third: distance and time for pace, distance and pace for finish time, or time and pace for distance. The tabs let you choose the answer you’re looking for, so you can use the same calculator for a completed run or a planned workout.

The race-distance menu includes a 2 Miles preset, and custom entries accept distances such as 1.8 or 3.2 miles without rounding them to a whole mile. For a one-mile run, total time and mile pace are the same: one mile in 8:00 gives an 8:00 mile pace.

The clock fields accept hours, minutes and seconds separately, so a 40-minute run belongs in 0 hours, 40 minutes and 0 seconds. Also, blank clock fields count as zero once a time is entered, but the calculation still needs a positive total time and distance.

Two miles in 19:44 gives a 9:52 mile pace, and four miles in 35 minutes gives 8:45 per mile. The table includes both short runs and longer distances, with average pace rounded to the nearest second so you can check a complete calculation against your own result.

Times shown as hours:minutes:seconds include the hours field.

For the two-mile example, 19 minutes 44 seconds is 1,184 seconds, and dividing by two gives 592 seconds per mile. Also, 4.5 hours means four hours and 30 minutes, so the 18-mile example uses 270 minutes divided by 18.

A 1.5 km run in eight minutes gives 5:20 per kilometer, or about 8:35 per mile, while a 1.5-mile run covers a longer distance. For a mile-and-a-half test, the 1.5-mile calculator and pace chart explains goal times and track checkpoints.

You add the segment times and distances first, then divide total time by total distance. For instance, if the first mile takes 8:00 and the next two miles take 18:00, the combined distance is three miles and that’s 26:00 of running time.

Your average pace is 26 ÷ 3 minutes per mile, or 8:40.

Simply averaging 8:00 and 9:00 would give 8:30, which leaves out the extra mile you ran at the slower pace. You can average the pace figures directly when the distances are equal, such as one mile at 8:00 and another at 9:00. In the calculator, enter the combined three miles and 26 minutes to check the unequal-distance example.

Exactly 13.1 miles in two hours gives about 9:10 per mile when rounded to the nearest second. The Half preset gives about 9:09 because it uses the full half-marathon distance of 21.0975 km, approximately 13.1094 miles. Both calculations use the same two-hour time, but the preset covers slightly more distance.

The World Athletics course-measurement handbook lists the half marathon as 21.0975 km and the marathon as 42.195 km. So, the preset fits a race over the standard distance, while a custom mile entry fits the distance you actually measured.

Time mode also works as a marathon time calculator in miles: at 9:00 per mile, a custom 26.2 miles takes 3:55:48, while the exact Marathon preset takes about 3:55:58. Also, these finish times assume you’re holding that pace throughout.

A distance needs a pace or speed before you can turn it into minutes. For example, 3.2 miles takes 32:00 at 10:00 per mile, or 25:36 at 8:00 per mile. Time mode works as a miles-to-minutes calculator once you enter a distance and the pace you expect to hold.

So, if you’re asking how many minutes 4.4 miles takes, you might plan for 44 minutes at a ten-minute mile. The pace supplies the assumption for that finish time, and the same applies to the shorter decimal-mile runs in the table.

To find how many miles you can cover in 26 or 30 minutes, choose Distance mode and add your pace. For 26 minutes at 10:00 per mile, dividing 26 by 10 gives 2.6 miles, while an 8:00 pace gives 3.25 miles in that same time.

Your running speed in miles per hour is miles divided by hours, or 60 divided by your pace in decimal minutes per mile. For five miles in 40 minutes, the speed is 7.5 mph because 40 minutes is two-thirds of an hour, with MPH shown beside the pace result. The other results include km/h and pace per kilometer.

You can use the Pace Converter when you already know your speed and want the equivalent running pace. Also, it converts miles per minute, which lets you move between a clock pace and a speed without supplying a run distance.

You can use this as a mile pacer for planning your checkpoints, with the split table showing the time to aim for at each marker. An 8:00 pace gives cumulative mile checkpoints of 8:00, 16:00 and 24:00. In Advanced Options, you can change the interval to kilometers, 400 meters or a custom distance.

A full mile is exactly 1,609.344 meters under the international-mile conversion listed by NIST. Four 400-meter laps cover 1,600 meters, leaving another 9.344 meters for a mile. The Track Pace Calculator helps you plan measured laps and the remaining distance.

Advanced Options also lets you compare even, negative and positive splits. A 3% negative split makes the second equal-distance half take 3% less time than the first; over 40 minutes, that’s about 20:18 followed by 19:42, with the total still fixed at 40 minutes.

The “Same Pace. Different Distance.” results show finish times if you maintain your current average pace. But maintaining that pace for a longer race also depends on preparation, so the arithmetic alone cannot tell you whether a particular race goal is achievable.

Open My Mile to save and review your running records, plans and calculator results. You can add a completed run, walk or run-walk activity manually, or use Save to My Mile beside a valid calculator result. The saved entry keeps the date and notes with the inputs, units and result.

When using it as a mile time tracker, keep completed activities separate from targets and estimates. In Pace mode, you can mark this calculation as a completed activity after confirming that the entered distance and time describe something you actually did. Time and Distance modes save plans, while other tools keep the appropriate plan, estimate or conversion label.

Your records stay in this browser for this site. My Mile includes JSON backups for restoring or moving full records and a CSV summary for spreadsheets. Download a backup before clearing site data, changing devices or moving to another domain.

Use elapsed time if you want stops included, or moving time to describe the time you were active. Strava’s explanation of moving and elapsed time shows why those figures can differ. Whichever you choose, use the same timing method when comparing your runs.

No. An 8:30 mile is eight minutes and 30 seconds, or 8.5 decimal minutes. If your source says 8.30 decimal minutes, the decimal part is 0.30 × 60 = 18 seconds, giving 8:18. In the calculator’s separate pace fields, enter minutes and seconds as labeled.

The oval is a drawing of the distance and splits you’ve entered, and one loop represents your whole run. It doesn’t record your location or measure a route. You supply the distance from your measured course, watch or other record.

Yes, the same time-and-distance calculation works for walking. For instance, two miles in 40 minutes gives 20:00 per mile and 3 mph. Your activity label doesn’t change the arithmetic, so you can enter your walking distance and time in Pace mode.