All tools — free, no account required
Free Health Calculators
A growing collection of free, browser-based health tools. All calculators run locally in your browser — no data is sent to a server, and no account is needed.
BMI Calculator
Calculate your Body Mass Index using metric or US units. See your adult BMI category and an estimated healthy weight range for your height.
Ideal Weight Calculator
Estimate your ideal body weight using the Devine, Robinson, and Miller formulas. Results are shown for all three formulas plus an average.
BMR Calculator
Find your Basal Metabolic Rate — the calories your body burns at complete rest — and estimate your total daily energy expenditure by activity level.
Calorie Calculator
Estimate your daily calorie needs for weight maintenance, gradual loss, or gain. Results shown across five goal levels based on your TDEE.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method. Only a tape measure required — no specialist equipment needed.
About these tools
All calculators on BMI Checks use standard, widely published formulas from peer-reviewed research and public health organisations including the WHO, CDC, NHS, and ACE. Results are estimates based on population averages and are provided for general informational purposes only.
No personal data you enter is stored on our servers. Optional local saving uses your browser's localStorage and stays on your device. For health decisions, always consult a qualified healthcare provider.
Health disclaimer
All tools on this site are for general informational purposes only and do not replace professional medical advice. Always consult a qualified healthcare provider for personal health concerns.