Every race and every training run boils down to one question: how fast did you actually move? A finish time of 30 minutes sounds different on a 3-mile jog than it does on a 6-mile tempo, which is why runners, coaches, and training plans all talk in pace — the time it takes to cover one mile or one kilometer. This running pace calculator takes your distance and your finish time, then instantly converts them into minutes per mile, minutes per kilometer, and average speed in miles per hour.
Whether you are training for your first 5K, aiming to break 4 hours in a marathon, or just trying to hold an easy conversational pace on a weekend long run, knowing your exact pace removes the guesswork. Enter your numbers on the left and the result card updates as you type.
How to Use
- Type the Distance of your run — for example, 5 for a 5-mile training run, 3.1 for a 5K, or 26.2 for a full marathon.
- Pick the Distance Unit —
milesif you train and race in the US,kmif you follow the rest of the world. The calculator converts between them automatically. - Enter your finish time in three boxes: Hours, Minutes, and Seconds. A 4-hour marathon goes in as 4 hours, 0 minutes, 0 seconds; a 28:45 5K goes in as 0 hours, 28 minutes, 45 seconds.
- Read the result card. Pace (min/mile) is the headline number most Americans train by; Pace (min/km) is what you want if your watch or your training plan uses kilometers; and Speed (mph) shows how fast you were moving on average over the whole run.
If you are preparing for a specific race, reverse the logic: find the pace you need to hit your goal time on the result card, then use that pace as your target in training. A 3:45 marathon, for instance, requires roughly 8:33 per mile — run your long workouts a little slower than that, and your tempo runs a little faster.
How Pace Is Calculated
The math is deliberately simple. First the calculator turns your hours, minutes, and seconds into a single number of minutes:
total minutes = hours × 60 + minutes + seconds ÷ 60
Then it divides time by distance. If you entered kilometers, it converts to miles using the standard factor 1 mile = 1.609344 km first:
- Pace (min/mile) = total minutes ÷ distance in miles
- Pace (min/km) = total minutes ÷ distance in kilometers
- Speed (mph) = distance in miles ÷ (total minutes ÷ 60)
A 5-mile run finished in 30 minutes works out to 30 ÷ 5 = 6:00 per mile, and 5 ÷ 0.5 hours = 10 mph. Because the engine converts units for you, the same 30-minute effort over 8.05 km (the metric equivalent of 5 miles) shows 3.73 minutes per kilometer — the same run, just expressed the way a Swedish or Kenyan training plan would write it.
Pace is also the easiest way to compare efforts across days. Headwinds, hills, and heat all slow you down; knowing that your "easy" pace should land around 9:30 per mile means a 10:40 mile on a humid day is not a slow day, it is a smart day. Many coaches prescribe runs as a percentage of your threshold pace — easy days at roughly 70–80% of your 5K speed, tempo runs near 90% — and this calculator gives you the baseline number those percentages are applied to.
Examples
Example 1 — A classic 5-mile training run. You cover 5 miles in 30:00 flat. The calculator shows 6:00 per mile, 3.73 min per km, and 10.0 mph. That is a solid tempo effort — fast enough to raise your heart rate into the 85–90% range, but sustainable for the whole distance.
Example 2 — Marathon goal pace. You want to finish the 26.2-mile marathon in 4 hours exactly. Plugging in 26.2 miles at 4:00:00 returns 9:09 per mile, 5:41 per km, and an average of 6.55 mph. Train your long runs around 9:45–10:00 per mile and your goal pace workouts right at 9:09, and on race day you will know exactly what each mile split should feel like.
Example 3 — A metric 10K. A European runner covers 10 km in 50:00. The result is 5:00 per km, which converts to 8:03 per mile and 7.46 mph. Crossing units like this is useful when you read a Strava segment in kilometers but race in Boston or Chicago, where course signs are in miles.
Example 4 — Half-marathon goal pace. You want to finish the 13.1-mile half marathon in 1:45:00. Plugging in 13.1 miles at 1:45:00 returns 8:01 per mile, 4:59 per km, and 7.49 mph. That is a strong-but-reachable goal; run most long-run miles around 8:30–9:00 per mile and practice your goal-pace repeats right at 8:01 so the rhythm feels automatic on race day.
FAQ
What is a good running pace for a beginner?
Most new runners finish easy jogs between 10:00 and 12:00 per mile (roughly 6:00–7:30 per km). If you can hold a conversation in short sentences, you are at the right effort — do not worry about the exact number until you have built a base for 8–12 weeks.
How do I convert pace from minutes per mile to minutes per km?
Multiply your min/mile pace by 0.6214. For example, 9:00 per mile becomes about 5:36 per km. To go the other direction, divide your min/km pace by 0.6214, or just enter the same run in the other unit on this page and let the calculator do it.
What pace do I need to run a sub-4-hour marathon?
A 4:00 marathon over 26.2 miles requires an average pace of 9:09 per mile, or 5:41 per km. Use this calculator with your goal time to confirm the number, then practice running it on training days so the rhythm feels familiar on race morning.
How is pace different from speed in mph?
Pace is time per distance (how long a mile takes); speed is distance per time (how many miles you cover in an hour). A 9:00 per mile pace equals 6.67 mph. Runners plan workouts in pace because watch lap alerts give time per mile, but speed is useful for comparing against cycling or driving, or for understanding treadmill settings.
Does running uphill or downhill change my pace?
Yes. A rule of thumb is that a 1% uphill grade adds roughly 15–30 seconds per mile compared with flat ground, and downhill can give back a similar amount. Many race-pace calculators adjust for elevation change, but this page uses flat-ground average — treat trail results as slightly slower than road results at the same effort.
Can I use this pace calculator for cycling or swimming?
The math works for any activity, but the units differ. Cycling speed is normally quoted in mph or kph rather than pace per mile, and swimming is quoted as pace per 100 meters. The conversion logic is identical — time divided by distance — so you can still plug in a bike ride or pool workout and read the average speed.
My pace feels slower in hot weather. Is that normal?
Completely normal. In conditions above 70°F with high humidity, most runners hold the same heart rate at a pace 20–45 seconds per mile slower than they would in 50°F weather. Judge training days by effort, not by the pace number this calculator returns, unless the day is cool.
Related Calculators
- Running Pace Calculator — the dedicated running-race pace tool with split tables.
- Half Marathon Pace Calculator — target pace for the 13.1-mile distance.
- Marathon Pace Calculator — pace charts for the 26.2-mile classic.
- Swim Pace Calculator — per-100-meter pace for pool and open water.
- Running Calorie Calculator — estimate calories burned at your pace and weight.
Disclaimer
This running pace calculator is provided for informational purposes only and does not constitute medical, training, or coaching advice. The results are arithmetic conversions based only on the distance and time you enter; they do not account for terrain, weather, elevation gain, fatigue, footwear, or your personal fitness. If you are new to exercise, returning after injury, or managing any heart, respiratory, or joint condition, consult a qualified healthcare provider before increasing your training intensity. Always warm up properly, hydrate, and stop running if you feel chest pain, dizziness, or severe shortness of breath.