Pace Calculator: Min per Km to Speed

This pace calculator works out your average pace (minutes per kilometre) and your average speed (kilometres per hour) from a finish time and a distance. Enter how long the run or ride took and how far you went, and you get both numbers instantly, plus the pace shown as a clock time (e.g. 5:30 per km).

Formula

The pace is simply the total time divided by the distance:

pace (min/km) = total time (min) ÷ distance (km)

The speed is the distance divided by the time in hours:

speed (km/h) = distance (km) ÷ (total time (min) ÷ 60)

Where:

• total time is your finish time in minutes (e.g. 50 minutes)
• distance is the distance covered in kilometres (e.g. 10 km)
• pace is the average time per kilometre, shown in minutes and seconds
• speed is the average speed in kilometres per hour

Worked Example

Using the default values – a 50‑minute finish time over 10 km:

1. Pace = 50 min ÷ 10 km = 5.00 min/km (which is 5:00 per km)
2. Speed = 10 km ÷ (50 min ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h

The calculator shows pace as 5.00 (min/km) and speed as 12.00 (km/h). If you want the pace as a clock time, the “time� output format would display 5:00.

When to Use This Calculator

Use it whenever you have a finish time and a distance and want to know your average pace – for example after a 5K parkrun, a 10K race, a half‑marathon, or a training run. It also works for cycling, swimming, or walking.

You can also use it in reverse: if you have a target pace, you can work out what finish time that implies, or what distance you can cover in a given time. But for that you’d use a different calculator (pace to time).

How to Read the Results

The pace result is the average time it took you to cover one kilometre. A lower pace number means faster – 4:30 per km is faster than 5:00 per km. The speed result is how many kilometres you covered in one hour on average.

Note that this is an average pace. If you run negative splits (faster second half), your actual pace varied, but the average is what this calculator gives.

Common Mistakes and Unit Mix‑Ups

• Using seconds instead of minutes – if you enter 3000 seconds, the calculator treats it as 3000 minutes. Always convert seconds to minutes first (divide by 60).
• Mixing miles and kilometres – if your distance is in miles, convert to km (1 mile = 1.60934 km) before entering, or use a pace calculator that accepts miles.
• Rounding too early – if you round the pace to 5.0 min/km, the speed becomes 12.0 km/h, but if you round to 5:00 exactly, it’s 12.0. For precise speed, keep more decimal places in the pace.

Limits of the Formula

The formula assumes a constant pace. It doesn’t account for hills, wind, stops, or changes in effort. It also assumes the distance is accurate – GPS watches can over‑ or under‑measure slightly, especially on trails or in cities with tall buildings.

For very short distances (like a 100m sprint), the pace in min/km becomes a very small number (e.g. 0.6 min/km) which is less intuitive. For very long distances, the pace is more meaningful.

Frequently Asked Questions

How do I convert my pace from min/km to min/mile?

Multiply the pace in min/km by 1.60934 to get min/mile. For example, 5:00 per km is about 8:03 per mile. Or use a pace conversion calculator.

What is a good pace for a beginner?

It depends on age, fitness, and gender. A common beginner 5K pace is around 7:00–8:00 per km (about 8–9 km/h). More experienced runners might do 5:00–6:00 per km. There’s no single “good� – compare to your own goals.

Why does my GPS watch show a different pace than this calculator?

GPS watches often show current pace (instantaneous) or use a rolling average. They also measure distance slightly differently (e.g. they may include every turn). The calculator gives the true average based on the distance you enter.

Can I use this for cycling?

Yes, absolutely. The same math applies. Just enter your cycling time and distance, and you’ll get your average speed and pace (though pace is less common in cycling, speed is more typical).

How do I convert my finish time from hours and minutes to minutes?

Multiply the hours by 60 and add the minutes. For example, 1 hour 30 minutes = 90 minutes. If you have seconds, divide by 60 and add that too (e.g. 1:30:15 = 90.25 minutes).

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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