Pace Calculator
Calculate your running pace and speed from distance and time.
Pace (min/km)
5:00/km
Speed (km/h)
12 km/h
Pace (min/mi)
8:03/mi
Race Time Distribution
Race Predictions
Race Predictions
| Distance | Estimated Time | Pace (min/km) | Pace (min/mi) | Speed (km/h) |
|---|---|---|---|---|
| 1 km | 5:00 | 5:00/km | 8:03/mi | 12 km/h |
| 5 km | 25:00 | 5:00/km | 8:03/mi | 12 km/h |
| 10 km | 50:00 | 5:00/km | 8:03/mi | 12 km/h |
| Half Marathon | 105:29 | 5:00/km | 8:03/mi | 12 km/h |
| Marathon | 210:59 | 5:00/km | 8:03/mi | 12 km/h |
Practical Example
Pace (min/km) = Total Minutes / Distance(km). Speed (km/h) = Distance(km) / Time(hours). Pace(min/mi) = Pace(min/km) × 1.60934.
Frequently Asked Questions
How is running pace calculated?
Pace = total time ÷ total distance — for example, 30 minutes for 5 km is 6:00 per km.
How do I convert pace to speed?
Speed = distance ÷ time; for pace per km, speed (km/h) = 60 ÷ pace (min/km).
How can I predict a race time?
Use a recent race time and a calculator like Riegel's formula: T₂ = T₁ × (D₂/D₁)^1.06.
What is the difference between metric and imperial systems?
The metric system (SI) uses base-10 units (meters, kilograms, liters) and is used worldwide. The imperial system uses units like feet, pounds, and gallons, and is primarily used in the US, UK (partially), and a few other countries.
Can I use this for professional or scientific work?
Yes, most smartphones include unit conversion in their calculator or search apps. However, specialized calculators like this one often provide more options, detailed breakdowns, and the ability to work with less common units.
Disclaimer: This calculator provides estimates for informational purposes only. Actual results may vary. Consult a qualified professional for personalized advice.