Free Fitness Calculators

Use your lab results to create personalized training zones and nutrition plans

VO₂ Max to Heart Rate Zones Calculator

VO₂ Max (ml/kg/min)

Age (years)

Resting HR (BPM)

Note: These zones are calculated using the Karvonen method (Heart Rate Reserve). For most accurate results, use your actual VO₂ max and resting heart rate from a professional test.

RMR to Calorie Bands Calculator

Weight (lbs)

Height

Age (years)

Gender

Note: This calculator uses the Mifflin-St Jeor equation, considered one of the most accurate for estimating RMR. For personalized nutrition guidance, consider getting a professional metabolic assessment.

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