Pace Calculator

Pace Calculator: Work Out Your Running, Walking or Cycling Pace

What Is Pace?

Pace tells you how long an activity takes per kilometre or per mile. It is the standard way runners and walkers describe how fast they are going, and it works for cycling and swimming too, although cyclists usually talk about speed instead. A lower pace number means you are moving faster.

A pace calculator does three jobs. Give it any two of distance, time and pace, and it works out the third:

• Pace: from your distance and time.
• Finish time: from your distance and pace.
• Distance: from your time and pace.

Pace Calculator Formulas

Pace and speed are two sides of the same measurement. To switch between them:

To switch between kilometres and miles, remember that 1 mile is 1.609 km. A pace per mile is a pace per kilometre multiplied by 1.609, and a pace per kilometre is a pace per mile divided by 1.609.

Pace Calculator Examples

Example 1: find your pace

You run 5 km in 28:00. That is 28 minutes ÷ 5 = 5 minutes 36 seconds per kilometre. In miles it is 5:36 × 1.609 = about 9:01 per mile, and your speed is about 10.7 km/h.

Example 2: convert your pace

You run 10 km in 55:00, so your pace is 5:30 per kilometre. Multiply by 1.609 and you get about 8:51 per mile. Your speed is 60 ÷ 5.5 = 10.9 km/h.

Example 3: predict a finish time

You are racing a 5 km event and reach the 1 km mark in 6:15. If you hold the same pace, your finish time is 6:15 × 5 = 31:15. This is a quick estimate and assumes you don’t slow down.

Example 4: find a walking pace

A steady walk at 3.5 mph is the same as 60 ÷ 3.5 = about 17:09 per mile, or about 10:39 per kilometre.

Pace and Finish Time Chart

Use this chart to see what a given pace means over common race distances:

A half marathon is 21.0975 km and a marathon is 42.195 km.

How to Use Split Times to Improve Your Pace

If you record your time at several points during a run, you can find the pace for each segment, or split. This shows where you speed up and where you slow down. You can then repeat the same route and compare each segment over time to see where to improve.

Example: you run 5 km and note your total time at each kilometre mark:

The total time is 28:40, so the average pace is 5:44 per kilometre (about 9:14 per mile). The splits are very even, which usually means you paced the run well. If your first splits are much faster than your last ones, you probably started too fast.

Pace and Heart Rate

Pace and heart rate usually rise together: the faster you go, the harder your heart works. Using both can help you train smarter, avoid overtraining and see your fitness improve, for example when you can hold the same pace at a lower heart rate.

Resting heart rate

Most adults have a resting heart rate between 60 and 100 beats per minute, and many healthy people fall between 50 and 90. A lower resting rate often means an efficient heart, but a resting rate that is persistently below 50 or above 90 is worth discussing with a doctor.

Maximum heart rate

The most accurate way to find your maximum heart rate is a cardiac stress test. The most common shortcut is:

This formula is only a rough guide, and many people’s real maximum is quite different. Use it as a reference, not a rule.

Training zones

Aerobic and Anaerobic Exercise

In aerobic exercise your muscles get enough oxygen to produce all the energy they need. This is the kind of effort you can keep up for a long time, such as an easy run or a brisk walk. In anaerobic exercise your muscles need energy faster than oxygen can arrive, so they break down sugar without oxygen and produce lactate. That causes the burning feeling in your legs, and you can’t keep it up for long.

For distance running, most training is aerobic, with some work near your lactate threshold, the pace where lactate builds faster than your body can clear it. Training at that level can help you hold a faster pace for longer. Labs measure thresholds directly, but one commonly used home estimate is a hard solo 30-minute run, taking your average heart rate over the final 20 minutes.

Exercise Pace During Pregnancy

In an uncomplicated pregnancy, regular moderate exercise is usually encouraged, but this is not the time to chase pace targets or personal bests. Your heart rate, breathing and joints respond differently, and the 220 − age formula is not reliable. Many doctors suggest using the “talk test” instead: you should be able to hold a conversation while you exercise.

Stop and call your doctor if you notice vaginal bleeding, dizziness, chest pain, shortness of breath before you begin, calf pain or swelling, leaking fluid, regular contractions or less movement from your baby. Always check with your doctor or midwife before starting or changing a routine. Our pregnancy calculator shows how far along you are, and our BMI calculator can help you review your starting weight.

Tips for Using a Pace Calculator

• Enter time as hours, minutes and seconds, and the distance with the right unit (km or miles).
• Use your real race or training times, not your best guess.
• Race predictions assume an even pace, but you will probably slow down over longer distances.
• Measure your route accurately with a GPS watch, a phone app or a map.
• Hills, heat, wind and tiredness all change your pace, so compare similar runs.

Pace Calculator FAQs

How do I calculate my running pace?

Divide your total time by your distance. For example, 30 minutes for 5 km is 6:00 per kilometre.

How do I convert minutes per km to minutes per mile?

Multiply the pace per kilometre by 1.609. A pace of 5:30 per km is about 8:51 per mile.

What is a good running pace?

It depends on your age, fitness and goals. Many beginners run between 6:30 and 8:00 per kilometre, and progress comes with regular training.

What pace do I need for a 5K in 30 minutes?

You need 6:00 per kilometre, or about 9:39 per mile.

How can I predict my marathon time?

Multiply your pace by 42.195 km. A pace of 6:00 per km gives about 4:13:10. In practice, most people slow down in the later miles.

Can I use a pace calculator for walking and cycling?

Yes. It works for any steady activity, although cyclists usually use speed in km/h or mph instead.

Is the 220 − age formula accurate?

It is a rough estimate only, and your real maximum heart rate can be quite different.

Is it safe to run while pregnant?

Many women who ran before pregnancy can continue with their doctor’s approval, but you should ask your own doctor or midwife and slow down rather than aim for pace targets.

Final Thoughts

A pace calculator turns your distance and time into numbers you can use to plan runs, compare efforts and set realistic goals. Combine it with how you feel, and remember that steady, consistent training is more important than any single number.