🔧 Utility & Conversion Tools
Quick conversion tools and utility calculators for endurance training. Convert between units, calculate percentages, and perform essential training calculations.
Race Pace Calculator
Calculate optimal race pace for any distance with training recommendations and split times.
✓ Negative split strategy
✓ Training recommendations
Training Load Calculator
Calculate TSS, CTL, ATL and manage training stress for optimal performance and recovery.
✓ Periodization tracking
✓ Smart recommendations
BPM to % Max Calculator
Convert heart rate BPM to percentage of maximum heart rate for training zone analysis.
✓ Percentage calculations
✓ Training zone reference
Windchill Calculator
Calculate windchill temperature and safety status for cold weather training with frostbite risk estimates.
✓ Frostbite risk estimate
✓ Gear recommendations
Pace to Speed Converter
Convert running pace (min/mile) to speed (mph/kph) for treadmill and training analysis.
✓ Multiple unit support
✓ Treadmill compatibility
Speed to Pace Converter
Convert speed (mph/kph) to running pace for outdoor training and race planning.
✓ Race planning support
✓ International units
Min/Mile to KPH
Convert minutes per mile pace to kilometers per hour for international training compatibility.
✓ Training compatibility
✓ Quick reference
KPH to Min/Mile
Convert kilometers per hour to minutes per mile pace for training and race analysis.
✓ Training analysis
✓ Race compatibility
Calories per Hour
Calculate hourly calorie burn for various activities and training intensities.
✓ Multiple activities
✓ Nutrition planning
KM to Miles Calculator
Convert kilometers to miles and vice versa with comprehensive conversion tables for ultra distances.
✓ Ultra distances
✓ Reference tables
RMR Calculator
Calculate your Resting Metabolic Rate and daily calorie needs with athlete-specific activity adjustments.
✓ Activity level TDEE
✓ Athlete recommendations
BMI Calculator
Calculate your Body Mass Index with athlete-specific interpretations and healthy weight recommendations.
✓ Body fat estimation
✓ Health recommendations
Quick Reference Tools
Fast Conversions
Quickly convert between different units and measurements for training and racing.
International Compatibility
Convert between metric and imperial units for global training compatibility.
Mobile Friendly
Access quick calculations on your phone during training sessions and races.
The gear these numbers assume
Every pace, zone and power figure on this page assumes something is measuring it. These are the three that cover running, cycling and the threshold work in between.
Garmin Forerunner 965
Multisport with the training-load and threshold metrics most of these calculations assume you can actually see day to day.
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COROS APEX 2 Series GPS Watch
Sapphire titanium and the longest battery in its class, which is the deciding feature once sessions run past a few hours.
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Favero Assioma Uno Power Meter Pedal
Single-sided pedal power, the cheapest honest way to start training with watts instead of estimating from heart rate.
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Utility Tool Tips
📖 Save References
Bookmark commonly used conversions for quick access during training.
🔄 Double Check
Verify unit conversions when switching between training devices or apps.
📱 Mobile Access
Use these tools on your phone for quick calculations during workouts.
🌍 Travel Ready
Essential for international races and training camps with different measurement systems.