Medical & Fitness Disclaimer
Last updated: July 2026
FitCalCalc provides estimates for informational purposes only. It is not a medical device and does not provide medical, nutritional, or fitness advice, diagnosis, or treatment.
Not Medical Advice
All results produced by our calculators — including TDEE, BMI, body fat percentage, one-rep-max, MET values, reverse TDEE, and water intake — are mathematical estimates based on standard published formulas. They are intended to help you understand general ranges and trends. They are not a substitute for the advice, diagnosis, or treatment of a licensed physician, registered dietitian, or certified fitness professional.
Consult a Professional
Before beginning any diet, exercise program, supplementation regimen, or weight-change plan, you should consult a qualified healthcare provider — especially if you:
- Are pregnant or breastfeeding
- Have a chronic condition (diabetes, heart disease, kidney disease, eating disorder history, etc.)
- Take prescription medication that affects weight, appetite, or metabolism
- Are under 18 or over 65
- Have a history of injury or are recovering from surgery
Accuracy & Limitations
- TDEE estimates total daily energy expenditure. Actual burn varies with genetics, hormones,NEAT, and unmeasured activity. Treat it as a starting point to be adjusted against real-world results.
- BMI is a population-level screening tool. It does not distinguish muscle from fat and can misclassify athletic individuals.
- Body Fat % from circumference (Navy / Jackson-Pollock) methods is an approximation accurate to roughly ±3–4% and depends on correct measurements.
- 1RM formulas (Epley, Brzycki) extrapolate from submaximal reps and become less reliable at very high rep counts.
- Water intake guidance is a general baseline; needs increase with heat, altitude, illness, and training load.
No Guarantee
We strive for accuracy but make no warranty — express or implied — about the completeness, reliability, or suitability of any output. You use FitCalCalc at your own risk. Decisions based on these estimates are solely your responsibility.
Emergency
If you think you may have a medical emergency, call your local emergency number immediately. Do not rely on this site for urgent decisions.
Affiliate & Advertising
FitCalCalc is supported by advertising (including Google AdSense) and may contain affiliate links. We may earn a commission on qualifying purchases at no extra cost to you. This does not influence our calculator formulas or recommendations. See our Privacy Policy and Terms of Service.
References
The formulas and constants used on this site are drawn from peer-reviewed and industry-standard sources. See our References page for the full list.