Free Tools
Fitness Calculators & Tools
Free fitness calculators to help you train smarter. No signup required, no data stored.
HRV Readiness Report
Get your HRV percentile + training readiness score
Try it free →Training Readiness Calculator
Should you train hard today? Enter HRV, sleep, soreness and fatigue for a score.
Try it free →Recovery Readiness Calculator
Am I recovered enough to work out?
Try it free →Body Fat Calculator (4 Methods)
Estimate body fat with Navy, Bailey, skinfold, or manual entry
Try it free →VO2 Max Calculator
Find your fitness age and percentile ranking
Try it free →Heart Rate Zone Calculator
Get your 5 personalized training zones
Try it free →Resting Heart Rate Evaluator
Is your RHR healthy for your age?
Try it free →Heart Rate Recovery Test
How fast does your heart recover?
Try it free →TDEE & Macro Calculator
Calculate daily calories and macro targets
Try it free →Fitness Level Assessment
How fit are you? Get your level from Starting to Elite
Try it free →Workout Quiz
Find your perfect workout program in 60 seconds
Try it free →