Endurance Training Calculators for Athletes

Dial in your training zones with simple, powerful tools designed to help you train smarter. Whether you are running, cycling or swimming, understanding your zones is the foundation of progress. The right data removes guesswork, keeps intensity balanced and helps you recover stronger after every session. Our endurance training calculators make it easy to find your exact numbers. You can calculate your max heart rate zones, lactate threshold heart rate zones and FTP power zones in seconds. Each calculator is built for accuracy and clarity. No confusion, no paywalls, just direct performance insight.

Lactate threshold tools help you discover the point where your body shifts from sustainable to hard effort, guiding effective tempo and threshold training. Lactate threshold heart rate gives you more personalised training zones compared to using only max heart rate, allowing you to pace sessions with greater precision and consistency. FTP calculators give cyclists and triathletes the power data they need to structure rides and brick sessions with precision. Every result you generate provides context for better decision-making in training.

Each calculator connects with FLJUGA training guides, showing you how to apply your results across real sessions and race preparation. You will learn how endurance zones interact, how to balance intensity and recovery and how to train with confidence at every level. The numbers give you feedback, but understanding how to use them is what creates lasting progress. Use these tools to track your progress across training blocks, set realistic goals and identify improvements in endurance over time. The more you understand your metrics, the more efficient your training becomes. Small gains add up. Over time, data-driven training turns consistency into confidence and endurance into performance.

Train smart. Go longer. Recover harder.