Pace Calculator
Running pace is calculated by dividing total time by distance. Formula: Pace = Time / Distance. For example, running 5K in 25 minutes = 5:00/km pace. To convert pace to speed: Speed (km/h) = 60 / pace (min/km). Race predictions use the Riegel formula: T2 = T1 × (D2/D1)^1.06.
Calculate running pace, finish time, or distance. Includes race presets (5K, 10K, Half Marathon, Marathon), split times, pace/speed conversion, and race time predictions using the Riegel formula.
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What do you want to calculate?
Distance
Time
How to Use
- Enter your value in the input field
- Click the Calculate/Convert button
- Copy the result to your clipboard
Frequently Asked Questions
- How do I calculate my running pace?
- Divide your total time by the distance covered. For example, if you run 10 km in 50 minutes, your pace is 50 ÷ 10 = 5:00 per km. For miles, divide time by distance in miles. A 50-minute 10K equals approximately 8:03 per mile.
- How do I convert pace from min/km to min/mile?
- Multiply your min/km pace by 1.60934 to get min/mile. For example, 5:00/km × 1.60934 = 8:03/mile. Conversely, divide min/mile by 1.60934 to get min/km. A 7:00/mile pace equals approximately 4:21/km.
- What is a good running pace for beginners?
- A comfortable beginner pace is typically 6:00-7:30 per km (9:40-12:05 per mile). Most beginners can complete a 5K in 30-40 minutes. Focus on being able to hold a conversation while running. As fitness improves, pace naturally decreases over weeks and months of consistent training.
- How does the Riegel formula predict race times?
- The Riegel formula (T2 = T1 × (D2/D1)^1.06) estimates race times at different distances based on a known performance. The 1.06 exponent accounts for the fact that pace slows as distance increases. For example, a 25-minute 5K predicts approximately a 52-minute 10K and a 1:55 half marathon.
- What pace do I need to run a sub-4-hour marathon?
- To finish a marathon under 4 hours, you need an average pace of approximately 5:41/km (9:09/mile). This means completing each kilometer in under 5 minutes and 41 seconds consistently over 42.195 km. Many runners aim for negative splits—running the second half slightly faster than the first.
- How do I convert pace to speed (km/h or mph)?
- To convert min/km pace to km/h speed, divide 60 by the pace in minutes. For example, 5:00/km = 60 ÷ 5 = 12.0 km/h. For min/mile to mph, divide 60 by the pace in minutes. A 8:00/mile pace = 60 ÷ 8 = 7.5 mph.