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Formula
The calculator above works out your average pace and speed for a run, cycle, walk, or any other activity where you know the total time and distance. The formula is simple:
Pace (min/km) = Total Time (min) ÷ Distance (km)
Speed (km/h) = Distance (km) ÷ (Total Time (min) ÷ 60)
Variables:
- t – total time in minutes (e.g., 50 minutes)
- d – distance in kilometres (e.g., 10 km)
- Pace – the number of minutes it takes to cover one kilometre
- Speed – the number of kilometres you cover in one hour
Worked Example
Using the default values from the calculator (50 minutes for 10 km):
- Pace = 50 min ÷ 10 km = 5.00 min/km
- Speed = 10 km ÷ (50 min ÷ 60) = 10 km ÷ 0.8333 h = 12.00 km/h
So if you run 10 km in 50 minutes, your average pace is 5 minutes per kilometre, and your average speed is 12 km/h. This matches the calculator output.
When to Use This Calculator
Use this tool whenever you want to know your average pace or speed for a training run, a cycling commute, a hiking trail, or any distance-based activity. It is especially useful for runners who train by pace zones (e.g., easy runs at 6:00 min/km) or who want to compare efforts across different distances and times.
You can also use it to plan: if you know your target pace, you can enter a distance and see what total time you should aim for, or enter a time and see what distance you can cover.
How to Read the Result
The first output, Average Pace, is shown in minutes per kilometre (min/km). A lower number means faster – for example, 4:30 min/km is faster than 6:00 min/km. The second output, Average Speed, is in kilometres per hour (km/h). A higher number means faster.
For US users, pace is often expressed in minutes per mile. To convert from min/km to min/mile, multiply the pace by 1.609. For example, 5:00 min/km is about 8:03 min/mile. Speed in mph is km/h divided by 1.609.
Common Mistakes
- Mixing units: The calculator expects time in minutes and distance in kilometres. If you enter a time in hours (e.g., 1.5 instead of 90), the result will be wrong. Convert hours to minutes by multiplying by 60.
- Using seconds: If you have a time like 50:30 (50 minutes 30 seconds), convert the seconds to decimal minutes (30 ÷ 60 = 0.5), so you enter 50.5.
- Rounding too early: If you round the pace to 5.0 min/km before calculating speed, you may get a slightly different speed. The calculator uses the full precision of the inputs.
- Ignoring elevation or stops: This calculator gives average moving pace if you enter moving time, or overall pace if you enter elapsed time including stops. Decide which you want before you start.
Limitations of the Formula
This is a simple average – it does not account for variations in terrain, wind, or your own effort. Your instantaneous pace during a run will fluctuate, but the average is a useful summary. Also, the formula assumes a constant speed, which is rarely true in real life, but the average is still the standard way to compare runs.
For very short distances (like 100 m sprints), pace in min/km is less intuitive – you might prefer speed in m/s or km/h. For very long distances (like ultramarathons), the average pace may be misleading if you take long breaks, so consider using moving time.
Frequently Asked Questions
How do I convert pace from min/km to min/mile?
Multiply the pace in min/km by 1.609. For example, 5:00 min/km × 1.609 = 8:03 min/mile. To convert the other way, divide min/mile by 1.609.
What is a good running pace for a beginner?
It varies widely, but a comfortable conversational pace for a beginner might be around 7:00–9:00 min/km (11:15–14:30 min/mile). Focus on effort rather than a specific number, and use the calculator to track your own progress.
Can I use this for cycling or walking?
Yes, the formula works for any activity where you have total time and distance. Just enter your cycling or walking time and distance, and you’ll get the average pace and speed.
Why does the speed output show a different number than my GPS watch?
GPS watches often show current speed, which fluctuates, or they may calculate average speed including stops. This calculator gives a simple average over the entire time and distance you entered. If your watch uses moving time, your numbers will differ.
How do I calculate pace for a half marathon (21.1 km) if I want to finish in 2 hours?
Enter 120 minutes for time and 21.1 km for distance. The result will be 5.69 min/km, which is about 5:41 per kilometre. That’s your target average pace.