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Formula
The calculator above computes your average pace and speed for a run, walk, or cycle. The formulas are:
- Pace (min/km) = Finish time (min) ÷ Distance (km)
- Speed (km/h) = Distance (km) ÷ (Finish time (min) ÷ 60)
Where:
- Finish time (t) – total time taken, in minutes (enter 50 for 50 minutes)
- Distance (d) – total distance covered, in kilometers (enter 10 for 10 km)
- Pace – minutes per kilometer, the standard metric for runners
- Speed – kilometers per hour, the standard metric for vehicles and cyclists
Worked Example
Using the default values: finish time = 50 minutes, distance = 10 km.
- Pace = 50 ÷ 10 = 5.00 min/km
- Speed = 10 ÷ (50 ÷ 60) = 10 ÷ 0.8333 = 12.00 km/h
So the calculator returns a pace of 5.00 min/km and a speed of 12.00 km/h.
When to Use This Calculator
Use this tool when you have a recorded finish time and distance and want to know your average pace or speed. It works for running, walking, cycling, swimming (if you convert distance to km), or any activity where you cover a known distance in a known time. It is especially useful for training plans, race pacing, or comparing performance across different routes.
How to Read the Result
A lower pace (e.g., 4:30 min/km) means faster running; a higher pace (e.g., 6:00 min/km) means slower. Speed is the inverse: higher km/h means faster. For runners, pace is more common; for cyclists, speed is more common. The calculator gives both so you can use whichever fits your context.
Common Mistakes and Unit Mix-ups
- Mixing minutes and hours – If your finish time is 1 hour 30 minutes, enter 90 minutes, not 1.5. The calculator expects minutes.
- Mixing miles and kilometers – If your distance is in miles, convert to km first (1 mile = 1.60934 km) or the pace will be off.
- Ignoring decimals – A pace of 5.5 min/km means 5 minutes 30 seconds per km (0.5 min = 30 sec). Many people misread 5.5 as 5 minutes 5 seconds.
Limitations of the Formula
The formula assumes a constant speed over the entire distance. Real-world runs have hills, stops, and varying effort, so the average pace may not reflect your actual pace at any given moment. It also does not account for elevation gain, weather, or fatigue. For interval training, calculate each segment separately.
Frequently Asked Questions
How do I convert my pace to seconds per km?
Multiply the decimal part of the pace by 60. For example, 5.25 min/km becomes 5 minutes and 0.25 × 60 = 15 seconds, so 5:15 per km.
What is a good running pace?
It depends on age, fitness, and experience. A 5:00 min/km pace is about 12 km/h, which is a solid recreational pace for many adults. Elite runners may do 3:00 min/km or faster. Use the calculator to find your own baseline and track improvements.
Can I use this for walking?
Yes. Walking pace is typically 8–12 min/km (5–7.5 km/h). Enter your walk time and distance to get your average pace.
Why does my GPS watch show a different pace?
GPS watches calculate pace in real-time, often using a rolling average over the last few seconds or minutes. They also account for elevation and GPS drift. Your average pace from a stopwatch and a known distance is more accurate for a flat course.
How do I calculate pace for a marathon?
If you want to finish a 42.195 km marathon in 4 hours, enter 240 minutes and 42.195 km. The calculator gives you 5.69 min/km, which is 5:41 per km. That is your target average pace.