Pace Calculator — Running Pace, Speed & Race Time Free

Whether you are training for a 5K or a marathon, knowing your pace is fundamental. Our Pace Calculator converts between distance, time, and pace in both metric and imperial units, plus projects your finish time for all standard race distances based on your current pace.

What Is a Pace Calculator?

A pace calculator determines how fast you are moving per unit of distance. Running pace is typically expressed as minutes per kilometer (min/km) or minutes per mile (min/mi). The calculator also converts to speed (km/h or mph) and projects race finish times.

How to Use Our Pace Calculator

1. Enter your distance and the time it took to cover it.
2. The calculator shows your pace in min/km and min/mile, plus speed in km/h and mph.
3. Estimated race times for 5K, 10K, half marathon, and marathon are displayed based on your current pace.
4. Use the race preset buttons to quickly set common distances.

Why Use a Pace Calculator?

• Training zones: Know your easy pace, tempo pace, and interval pace to train at the right intensity.
• Race planning: Set realistic race goals based on your training pace. Running a 5K at 5:00/km pace means finishing in 25:00.
• Progress tracking: Compare your pace over the same distance across weeks and months to see improvement.
• Unit conversion: Quickly convert between min/km and min/mile for runners who use both systems.

Common Use Cases

Marathon runners planning their race strategy need to know their target pace per kilometer to hit their goal finish time. A 4-hour marathon requires a pace of 5:41/km — the calculator makes this instant.

Runners training with a Couch-to-5K program track their improving pace as they build fitness, using the calculator to project when they might break 30 minutes for 5K.

Tips and Best Practices

• Most easy runs should be 1-2 minutes per kilometer slower than your race pace. Running easy runs too fast is the most common training mistake.
• Race pace predictions assume equal effort across distances. In reality, your per-km pace slows for longer races — a 5:00/km 5K runner will not maintain that pace for a marathon.
• Track your runs with a GPS watch or phone app, then use the calculator to analyze pace and plan future training.

Ready to try it? Use our free Pace Calculator now — no signup required, works entirely in your browser.

Frequently Asked Questions

What is a good running pace for beginners?

Most beginners run at 7:00-9:00 min/km (11:00-14:30 min/mile). A good first goal is completing a 5K without stopping. Focus on consistency and gradual improvement rather than hitting a specific pace.

How do I convert min/km to min/mile?

Multiply min/km by 1.60934. For example, a 5:00 min/km pace equals approximately 8:03 min/mile. Our calculator does this conversion automatically.

What pace do I need for a 4-hour marathon?

A 4-hour marathon requires an average pace of 5:41 per kilometer (9:09 per mile). This is a popular goal that requires consistent training and good pacing strategy on race day.