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

DistanceEstimated TimePace (min/km)Pace (min/mi)Speed (km/h)
1 km5:005:00/km8:03/mi12 km/h
5 km25:005:00/km8:03/mi12 km/h
10 km50:005:00/km8:03/mi12 km/h
Half Marathon105:295:00/km8:03/mi12 km/h
Marathon210:595:00/km8:03/mi12 km/h

Understanding Pace

The running pace calculator converts between pace, speed, distance, and time for running and other endurance activities. Pace, typically expressed as minutes per kilometer or minutes per mile, is the standard metric runners use to track and plan their performance. Unlike speed which tells you how far you travel per unit of time, pace tells you how long it takes to cover each unit of distance, which is more intuitive for most runners. Enter any two values among distance, time, and pace to calculate the third. The calculator also provides equivalent speeds in multiple units and estimated finish times for common race distances including five kilometers, ten kilometers, half marathon, and full marathon. This is invaluable for race planning and goal setting. If you know you can sustain a five-minute-per-kilometer pace, the calculator shows your predicted finish time for any race distance. Pace calculations are also useful for walking, cycling, swimming, and other distance-based activities. Coaches use pace to design training plans, athletes use it to track fitness improvements, and race directors use it to set course time limits. Use this free pace calculator for training, race planning, or any endurance sport calculation.

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.

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