Free Running Tools

Professional calculators to help you plan training runs, set race goals, and optimize your performance. All tools are free and require no signup.

Pace Calculator

Calculate your running pace, finish time, or distance with precision. Perfect for planning your training runs and race strategies.

Whether you're planning your weekly long run or strategizing for race day, our pace calculator helps you dial in the perfect pace. Simply enter two values, and we'll calculate the third. Switch between miles and kilometers with ease.

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Key Features

  • Calculate pace from distance and time
  • Predict finish time based on pace and distance
  • Determine distance from pace and time
  • Toggle between miles and kilometers
  • Instant, real-time calculations
  • No signup required

Race Time Predictor

Predict your race times for any distance based on your recent race performance using the proven Riegel formula.

Used by runners worldwide, our race time predictor uses the scientifically-validated Riegel formula to estimate your potential race times. Enter a recent race result, and we'll predict your performance across all standard race distances.

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Key Features

  • Riegel formula for accurate predictions
  • Predict times for 5K, 10K, Half Marathon, and Marathon
  • Based on your actual race performance
  • Instant predictions for all distances
  • Helps set realistic race goals
  • Free to use, no account needed

VO2 Max Calculator

Estimate your VO2 max and cardiovascular fitness level from your race performance. Understand your aerobic capacity and track improvements.

VO2 max is the gold standard for measuring aerobic fitness. Our calculator uses scientifically validated formulas to estimate your VO2 max based on race performance, giving you insights into your cardiovascular fitness and training potential.

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Key Features

  • Estimate VO2 max from race times
  • Gender-specific fitness classifications
  • Understand your aerobic capacity
  • Track your aerobic fitness progress
  • Based on scientific formulas
  • Instant fitness level assessment

Training Zone Calculator

Calculate your heart rate and pace training zones to optimize your workouts and train at the right intensity for every run.

Training at the correct intensity is crucial for improvement. Our calculator determines your personalized heart rate and pace zones using both simple and Karvonen formulas, helping you maximize the benefits of every training session.

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Key Features

  • Calculate 5 heart rate training zones
  • Simple and Karvonen formula options
  • Pace zones based on recent race times
  • Detailed zone descriptions and purposes
  • Optimize your training intensity
  • Improve running efficiency

Calorie Calculator

Estimate calories burned during your runs based on distance, pace, and body weight. Track your energy expenditure accurately.

Whether you're running for fitness or weight loss, understanding your calorie burn is essential. Our calculator provides accurate estimates based on weight, distance, and pace, with helpful food comparisons to visualize your effort.

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Key Features

  • Estimate calories burned per run
  • Adjusts for pace and body weight
  • Miles and kilometers support
  • Fun food equivalency comparisons
  • Tips to maximize calorie burn
  • Track energy expenditure

Ready for a Complete Training Plan?

Our free tools are great for quick calculations, but if you need a complete personalized training plan with daily workouts, progressive overload, and recovery weeks, we've got you covered.

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