Running Pace Calculator
Pace, speed, finish times & race predictions · free, no signup
Free Running Pace Calculator — Pace, Speed and Race Finish Times
Pace is how long it takes you to cover a distance, usually shown as minutes per kilometre or minutes per mile. Speed is the same idea inverted — kilometres or miles per hour. This calculator converts between them and predicts your finish times over the classic race distances.
Enter a distance and a time to get your pace and speed, or enter a target pace to see the time it implies. A table then shows your projected finish time for 1 mile, 5K, 10K, half marathon and marathon at that pace, helping you set realistic goals, plan training runs and pace a race evenly from the start.
Key features
Pace and speed
Per km, per mile, km/h and mph.
Race predictions
5K, 10K, half marathon and marathon times.
Two-way
Time to pace or pace to time.
Runners and cyclists
Works for walking, running, cycling or swimming.
How to use it
- Enter your distance and unit.
- Enter your time (hours, minutes, seconds).
- Read your pace and speed.
- Check the race prediction table.
Worked example
Example
10 km in 50:00 → pace 5:00 /km (8:03 /mile), speed 12.0 km/h At that pace: 5K 25:00 · half marathon 1:45:29 · marathon 3:30:59
Who uses this tool
Runners
Set race goals and training paces.
Coaches
Build pace charts for athletes.
Cyclists and walkers
Convert speed and time for any route.
Tips for the best results
- Start races slightly slower than goal pace and finish strong.
- Long easy runs should feel conversational.
- Predictions assume you can hold pace; endurance drops over longer distances.
- Update targets as your fitness improves.
Common mistakes to avoid
- Going out too fast in the first mile or kilometre.
- Comparing pace per mile with pace per kilometre by mistake.
- Assuming 5K pace can be held for a marathon.
Why use AZRS QuickFix?
It is 100% free, needs no signup and has no watermark or usage limits. The tool runs in your browser, so what you type stays on your device, and it works on phones, tablets and desktops. New tools are added every week — bookmark this page or browse the full QuickFix toolbox.
Frequently asked questions
How do I calculate running pace?
Divide your time by the distance, for example 50 minutes / 10 km = 5:00 per km.
What is a good 5K time?
For beginners, 30–35 minutes is common; 20–25 minutes is a strong recreational time.
How do I convert min/km to min/mile?
Multiply by 1.609; the calculator does this for you.
What pace do I need for a 4-hour marathon?
About 5:41 per km or 9:09 per mile.
Can I use it for cycling?
Yes, use the speed output.
Is it free?
Yes.