Endurance Performance Calculator
Dietary nitrate supplementation reduces oxygen cost at a given power output by 1 to 3% in published research (Lansley et al. 2011, Hoon et al. 2014). Enter your race distance and goal finish time below. The calculator converts that percentage into the actual minutes and seconds it represents on your specific course.
The calculation applies to events where oxygen delivery is the primary limiter: runs longer than 5K, cycling efforts over 30 minutes, and triathlon events at Olympic distance and above. Sprint events and efforts under 3 minutes rely more on anaerobic capacity where the nitrate mechanism is less pronounced.
What Does 1% Oxygen
Savings Actually Mean?
Dietary nitrate reduces the oxygen cost of exercise by 1 to 2 percent. Enter your race and finish time to see what that means in minutes, seconds, and pace for your specific event.
Select your sport, distance, and finish time to see your projection
Published peer-reviewed research demonstrates that dietary nitrate supplementation at a clinical dose (300 to 600mg NO3) reduces the oxygen cost of sustained exercise by approximately 1 to 2 percent. This calculator applies that range directly to your finish time: a 1 percent oxygen cost reduction translates to roughly 1 percent improvement in time performance at equivalent effort. The per-mile projection divides total time saved by event distance in miles. The watt projection applies the same percentage to your FTP. This is a research-based estimate, not a guarantee. Individual response depends on diet, training status, altitude, and heat. See Lansley et al. (2011), Bailey et al. (2009), and the 2018 IOC consensus statement on dietary supplements for the primary literature.