Distance Converter - Miles to Kilometers Calculator

Unit Converters

Convert running distances between miles and kilometers instantly. Essential tool for international race planning, training programs, and GPS watch setup. Accurate conversion for 5K, 10K, half marathon, marathon, and custom distances.

Kilometers
km
Miles
mi

Distance Conversion

Equivalent distances in kilometers and miles

10 km ⟷ 6.214 mi

How to Use the Distance Converter

1. Enter your distance: Type any distance value in either kilometers or miles - the tool automatically converts to the other unit.

2. Use quick selectors: Click on common race distances (5K, 10K, half marathon, marathon) for instant conversion of popular running distances.

3. Plan your training: Use the conversions to follow international training plans, set GPS watch targets, or understand race distances when traveling.

Standard Race Distances

Understanding common race distances in both units helps with race planning and training:

Popular Race Distances

  • 5K: 3.11 miles
  • 10K: 6.21 miles
  • 15K: 9.32 miles
  • Half Marathon: 21.1K = 13.11 miles
  • Marathon: 42.2K = 26.22 miles

Training Distances

  • 1 mile: 1.61 kilometers
  • 3 miles: 4.83 kilometers
  • 5 miles: 8.05 kilometers
  • 10 miles: 16.09 kilometers
  • 20 miles: 32.19 kilometers

When to Use Each Unit System

Choose the right unit system based on your location, training goals, and race destinations:

Use Kilometers For:

  • International races: Most global races use metric distances
  • Track training: Standard track is 400m, making km calculations easier
  • European/Asian training: Following plans from metric-system countries
  • Smaller milestones: More frequent progress markers during long runs

Use Miles For:

  • US/UK racing: Many local races use mile-based distances
  • Road running: Mile markers are common on roads and paths
  • Traditional training: Classic training programs often use miles
  • Mental familiarity: If you think in miles for daily distances

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Calories Burned Calculator

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Medical Disclaimer

This calculator is for informational purposes only and is NOT medical advice. Results may be inaccurate. Always consult healthcare professionals before making health decisions.

Read full disclaimer →

Frequently Asked Questions

What's the exact conversion between kilometers and miles?

1 kilometer equals 0.621371 miles, and 1 mile equals 1.609344 kilometers. This tool uses precise conversion factors to ensure accuracy for all your training and racing needs. Understanding both units helps when following international training plans or racing abroad.

Why do some countries use kilometers while others use miles?

Most countries worldwide use the metric system (kilometers), while the United States, United Kingdom, and a few others primarily use the imperial system (miles) for road distances. In running, this means race distances like 5K, 10K, and marathons are often measured in kilometers globally, while some regions prefer miles for training and shorter races.

How do I convert my training paces between units?

When converting training plans between units, remember that pace also changes. A 6:00/mile pace equals approximately 3:44/km pace. Use our pace converter for accurate pace conversions, and our pace calculator to determine optimal training paces in your preferred unit.

What are the standard race distances in both units?

Common race distances: 5K = 3.11 miles, 10K = 6.21 miles, Half Marathon = 21.1K = 13.11 miles, Marathon = 42.2K = 26.22 miles. Many races also use mile markers (1 mile = 1.61K). Use our finish time predictor to estimate your performance across different race distances.

Should I train in kilometers or miles?

Train in the unit system you're most comfortable with or that matches your target races. If racing internationally, consider training in kilometers. If racing locally in mile-based regions, miles might be more intuitive. The key is consistency in your training log and understanding both systems for race planning.

How does distance unit choice affect my training?

The unit choice doesn't affect your actual fitness or performance, but it can impact your mental approach and pacing strategy. Some runners find kilometer splits more motivating (smaller, more frequent milestones), while others prefer the traditional mile markers. Choose what helps you stay motivated and track progress effectively. Monitor your energy expenditure regardless of unit choice.