Health Calculators
Monitor your body mass index (BMI), calories, ideal weight, body fat, and wellness metrics.
Age Calculator
Calculate your exact age in years, months, days, total hours, minutes, and seconds, with a countdown to your next birthday.
ASQ Calculator
Calculate Ages & Stages Questionnaires (ASQ-3) screening age adjusted for premature birth (<37 weeks) and score Autism Spectrum Quotient (AQ).
Bayes' Theorem Calculator
Calculate conditional posterior probability P(A|B), positive predictive value (PPV), false positives, and medical test accuracy.
BMI Calculator
Calculate your Body Mass Index (BMI), identify weight categories, and discover your healthy weight range in metric or imperial units.
Fat Percentage Calculator
Estimate body fat percentage, lean muscle mass, and fat mass using the clinically proven U.S. Navy circumference method.
Heat Index Calculator
Calculate NOAA "feels like" apparent temperature from ambient temperature and relative humidity with heat exhaustion and heat stroke danger warnings.
Hip Thrust Calculator
Calculate barbell hip thrust one-rep max (1RM), training volume, bodyweight strength ratio, and glute hypertrophy target weights.
PSA Density Calculator
Calculate Prostate-Specific Antigen (PSA) density to assess prostate cancer risk and differentiate BPH from malignant tumors.
Sleep Calculator
Calculate optimal bedtimes and wake-up times aligned with natural 90-minute REM sleep cycles to avoid morning grogginess.
Weeks Calculator
Convert weeks to days, hours, minutes, and approximate months for pregnancy milestones, school semesters, and projects.
Frequently Asked Questions about Health Calculators
Are the calculators in this category free to use?
Yes. All health calculators on Calculat.dev are 100% free with no account registration or limits.
Are my calculation inputs saved on a database?
No. Every calculation executes client-side directly in your browser. No personal or numeric inputs are recorded or transmitted to any server.
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Math Calculators
Solve arithmetic, percentages, averages, algebra, geometry, and advanced mathematics problems.
Finance Calculators
Calculate loans, mortgages, compound interest, investments, savings, and retirement planning.
Date & Time Calculators
Calculate exact age, days between dates, time durations, work days, and countdowns.
Everyday Calculators
Everyday utilities including restaurant tip splitting, discounts, gas mileage, and cooking conversions.