Health & Fitness
Free health and fitness calculators — body fat percentage, TDEE (daily calories), macronutrients, sleep cycles, RPE for lifting, carbon footprint, ADHD and autism screening.
Body Fat Calculator
Free body fat percentage calculator using the US Navy method. Estimate body composition and compare to healthy ranges.
1 minRPE Calculator
Free RPE calculator for strength training. Estimate your one rep max (1RM) or target weight using the Rate of Perceived Exertion scale.
1 minCarbon Footprint Calculator
Free carbon footprint calculator. Estimate your annual CO2 emissions and compare to world averages.
3 minSleep Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycles.
1 minADHD Screening Test
Free ADHD screening based on the WHO ASRS v1.1. Quick 6-question or full 18-question version.
1-3 minAutism Spectrum Test
Free autism screening based on the AQ by Baron-Cohen (Cambridge). Quick 10-question or full 50-question version.
2-10 minTDEE Calculator
Calculate your Total Daily Energy Expenditure
1 minMacro Calculator
Calculate your daily protein, carbs and fat targets
1 minRunning Pace Calculator
Calculate your pace, finish time, and race predictions
1 minHealth and fitness tools help you understand your body and make informed decisions about your wellbeing. From body composition calculators to mental health screenings, these tools provide accessible starting points for health awareness.
These calculators use established scientific formulas and validated screening instruments. However, they are informational tools — not medical devices. Always consult healthcare professionals for clinical decisions.
FAQ
Are these health tools medically accurate?
The tools use published scientific formulas and validated instruments (like the WHO ASRS for ADHD and Baron-Cohen AQ for autism). They provide estimates and screening results, not clinical diagnoses.
Should I make health decisions based on these results?
Use these tools for awareness and initial exploration. Always discuss results with a qualified healthcare provider before making medical decisions or starting treatment.
Which health tool should I try first?
TDEE Calculator is useful for anyone interested in nutrition. Sleep Calculator helps optimize rest. The screening tools (ADHD, ASD) are specifically for people who suspect they may benefit from evaluation.