Pace Calculator
Overview
This free pace calculator helps runners, walkers, and endurance athletes calculate pace, speed, and finish time instantly. Enter your distance and time to find your pace, or enter your pace to compute expected finish times for any distance. The tool supports both min/km and min/mile calculations and includes automatic speed conversions into km/h and mph. You can also select race presets like 5K, 10K, half marathon, or marathon for quick predictions. Every calculation happens instantly in your browser, with no data stored or sent anywhere. Whether you're training for a race, planning interval workouts, or just curious about your running performance, this pace calculator provides clear, accurate, and fast results.
About
About Running Pace & Speed
A pace calculator is an essential tool for runners, walkers, and endurance athletes who want to understand their performance metrics. Pace expresses how long it takes to cover a fixed distance and is typically shown as minutes per kilometre or minutes per mile. By comparing pace, time, and distance together, athletes can estimate finish times, set training targets, and measure improvements. This calculator supports both metric and imperial units, converting values seamlessly between kilometers, miles, and meters. Speed calculations also provide km/h and mph so users can relate running pace to general movement speed. The algorithm uses simple time and distance math and supports preset race distances to make calculations faster. Because all operations run directly in your browser, the tool is private, fast, and reliable. Whether you're planning a training cycle or optimizing race strategy, this pace calculator offers accurate and easy-to-understand metrics to guide your running progress.
Features:
- Pace calculator – min/km and min/mile support
- Speed conversions – km/h and mph calculations
- Finish time predictor – estimate race completion times
- Distance calculator – find achievable distance in fixed time
- Race presets – 1K, 5K, 10K, half marathon, marathon
- Flexible inputs – enter any two of (time, distance, pace)
- Metric and imperial units – km, miles, meters support
- Race prediction grid – compare multiple distances
- Summary card – all metrics at a glance
- 100% client-side – no data storage or transmission
FAQ
What is running pace?
Pace is the time it takes to run one kilometre or one mile. For example, a 6:00 min/km pace means you run 1 km in 6 minutes.
Which unit should I use — min/km or min/mile?
Use min/km for metric training and min/mile for U.S. or imperial-based pacing. The calculator converts between both automatically.
How do I calculate finish time for a race?
Enter your pace and the race distance — the calculator will compute finish time instantly. You can also use race presets like 5K or Marathon.
Do I need to enter all fields?
No. Enter any two values (time, pace, distance) and the tool solves the third automatically.
Is this accurate for walking too?
Yes. Pace and speed math works for both running and walking. The calculator doesn't distinguish between the two.
How do I use race presets?
Click any race preset button (5K, 10K, etc.) to auto-fill the distance. Then enter your pace or time to see predictions.
Can I convert between min/km and min/mile?
Yes. The calculator automatically shows both units and converts between them based on your input.
What if my pace varies during a run?
This calculator assumes constant pace. For variable pace, calculate segments separately and add the times.