Pace Calculator

Use this pace calculator to quickly find your running pace, finish time, or required speed based on any two of these: distance, time, and pace.

Whether you’re planning a race, setting interval targets, or checking your easy-run effort, just enter your numbers, pick your units (miles or kilometers), and get the results you can use right away.

FAQs on pace calculator

What do “pace,” “distance,” and “time” mean in this calculator?

Pace is how long it takes you to cover one mile or one kilometer. Distance is how far you ran (or plan to run). Time is your total time for that distance, and the calculator finds the missing piece.

Should I use pace per mile or pace per kilometer?

Use the unit that matches your plan and your race. Most US races and plans use minutes per mile, many other places use minutes per kilometer. Switching units changes the number, not your effort.

Why doesn’t the pace match what my watch shows?

Your watch pace can jump around because of GPS wobble, short turns, trees, buildings, or quick speed changes. Compare average pace over a longer stretch, like one mile or one kilometer. For treadmill runs, watch pace can be off because the watch has to guess speed indoors.

What does “speed” mean, and how is it different from pace?

Speed is distance per time, like miles per hour or kilometers per hour. Pace is time per distance, like minutes per mile. Example: 6.0 mph equals a 10:00 per mile pace.

How do I use the splits section for pacing?

Splits break your total time into equal chunks so you can see what each mile or kilometer should take. Use it to plan even pacing, or to practice finishing a little faster. If you choose negative splits, start slightly slower and build late, not early.

Why are my splits uneven even when I try to run steady?

Small hills, wind, heat, crowded paths, and sharp turns change pace. Your effort can be steady while your pace changes. If you want steadier splits, run by effort (talk test or RPE) and check pace after the fact.

When should I stop chasing a pace and call it a day?

Stop and get help if you have chest pain, feel faint, or have sudden severe shortness of breath. Stop if you feel a sharp pain that changes your stride. On normal tired days, back off to an easy effort and save the pace work for another run.

Alex Roven

I completed my first 10K on a dare. In a year, I ran a half-marathon. Another year later, I finished a marathon race. Today I run 4 marathons a year and a half-marathon every week. I learned everything about running the hard way. So, I help runners achieve better results easier.