Medical Disclaimer (New Zealand)
Educational use only — not medical advice.
Medical Disclaimer: Educational Purposes Only
The calculators, tools, blog posts, and resources on Weight Loss Percentage are designed for educational and informational purposes only. They do not constitute professional medical advice, diagnosis, or treatment.
You should never rely on the information on this website as a substitute for consulting a qualified physician, pediatrician, registered dietitian, or health professional. Always seek medical clearance before starting a new diet or exercise regimen.
Never disregard professional medical advice or delay seeking treatment because of something you read on this website. In the case of a medical emergency, contact your doctor or local emergency services immediately.
Medically reviewed by Dr. Rekha Kumar, M.D., M.S. — Lead Medical Reviewer · Last reviewed: September 2026 · Updated: 2026-09-15
Evidence & references
This tool is for informational purposes only and is not a substitute for professional medical advice.
Frequently asked questions
Is this calculator free to use?
Yes. Every calculator on Weight Loss Percentage is free, with no sign-up or account required.
How accurate is the result?
Results depend on the accuracy of what you enter and the published formulas the tool uses, which follow standard guidance from national health authorities. Track the trend over weeks rather than relying on a single reading.
How often should I check it?
Check whenever your weight, activity or goals change — for most people once a week is enough to see a reliable trend.
Who reviews the content on this site?
All medical and nutrition content is written and reviewed by Dr. Rekha Kumar, M.D., M.S., our lead medical reviewer, and cites guidance from U.S. federal health sources such as the CDC and NIH.