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06 Numbers and Powers

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Card No. 06·50750 · Updated · Standard formula, shown below

Average pace 5.00 min/km
Average speed
12.00 km/h
Result
Finish time
50 min
You entered
Distance
10 km
You entered
You enter
Finish time, Distance
You get
Average pace, Average speed
Rounding
2 dp

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Formula

The calculator works out your average pace and speed for a run, ride, walk, or any distance activity. You enter the finish time in minutes and the distance in kilometres, and it returns:

  • Pace = finish time ÷ distance (minutes per kilometre)
  • Speed = distance ÷ (finish time ÷ 60) (kilometres per hour)

Where:

  • t = finish time in minutes
  • d = distance in kilometres

Worked Example

Using the default values: you finish a 10 km run in 50 minutes.

Step 1: Calculate pace.
Pace = 50 ÷ 10 = 5.00 min/km

Step 2: Calculate speed.
Speed = 10 ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h

So your average pace is 5:00 per kilometre, and your average speed is 12.0 km/h.

Why Use This Calculator

Runners and cyclists use pace to plan training sessions, set realistic race goals, and compare efforts across different distances. Knowing your average speed is useful for estimating how long a future trip will take, especially if you are planning a route with hills or headwinds.

For example, if you know your comfortable endurance pace is 6:00 min/km, you can predict a 15 km run will take about 90 minutes. That helps you schedule hydration, fuel, and daylight.

How to Read the Results

The pace value is the most common metric for runners: a lower number means faster. The speed value is more intuitive for cyclists and drivers. Both numbers reflect your overall average, not your instantaneous pace – so a hilly course will show a slower average than a flat one even if your effort is the same.

If you run on a treadmill, the displayed speed is usually in km/h or mph, so you can use this calculator to convert your treadmill speed into a pace you can use outdoors.

Common Mistakes

  • Mixing units: Entering distance in miles but time in minutes gives a pace in min/mile, which looks similar but is not comparable to min/km. Convert miles to kilometres first (1 mile = 1.609 km).
  • Using total time instead of moving time: If you stop at traffic lights or for water, your total time includes those stops. For a true running pace, use the time you were actually moving.
  • Rounding too early: Keep at least two decimal places during the calculation to avoid a small error in the final pace.

Limitations of the Formula

This is a simple average calculation. It does not account for elevation gain, terrain, wind, or your heart rate. Two runs with the same average pace can feel very different. For training purposes, use pace zones based on your fitness level, not just a single average number.

Also, the formula assumes a constant speed. If you run negative splits (faster second half), your average pace is still correct, but it hides the variation. For detailed analysis, use a GPS watch or app that records per-kilometre splits.

Frequently Asked Questions

How do I convert min/km to min/mile?
Multiply the min/km value by 1.609. For example, 5:00 min/km is about 8:03 per mile. Or use the calculator with distance in miles converted to kilometres.

What is a good pace for a beginner?
It depends on age, fitness, and experience. A common conversational pace for a new runner is around 7:00–8:00 min/km (11–13 min/mile). Focus on effort, not a specific number.

Does this work for walking?
Yes. The formula is the same. A typical walking pace is 12–15 min/km (about 4–5 km/h).

Why is my speed in km/h different from my treadmill’s display?
Treadmills are often calibrated differently, and they may show a slightly different speed than your actual outdoor pace. Also, the treadmill does not account for wind resistance, so your outdoor speed at the same effort is usually a bit slower.

Can I use this for cycling?
Absolutely. Enter your ride time and distance, and you will get your average speed in km/h. Many cyclists track this to measure improvement over time.

Related

Formula used
in t | Finish time | min | 50 | 0
in d | Distance | km | 10 | 0 | 100000
out pace | Average pace | min/km | t / d | 2
out speed | Average speed | km/h | d / (t / 60) | 2

Each line is one input (in, sel, list) or one result (out: label, unit, formula, decimals). How the calculators work

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.

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