Free Health & Fitness Calculators No Email Needed
Free clinical, pediatric, longevity, and fitness calculators. Calculate CDC BMI percentiles, metabolic age, body fat, and athletic performance with 100% browser privacy.
BMI Percentile Calculator | CDC Child & WHO Adult BMI
Calculate BMI and CDC percentile for children & teens (ages 2-19) or WHO category for adults. Includes height/weight metric & imperial tools and visual growth chart.
Metabolic Age Calculator | MTF
Calculate your metabolic age based on Basal Metabolic Rate (BMR), weight, body fat %, and physical activity level. Free health calculator.
Body Fat Percentage Calculator | MTF
Calculate body fat percentage using the US Navy circumference method and BMI-derived estimation formula. Compare male/female body fat ranges with dynamic charts.
Bone Age Calculator | MTF
Estimate pediatric bone age and growth potential based on skeletal maturity parameters. Free online reference calculator.
Biological Age Calculator | MTF
Estimate your biological age vs chronological age using key health, fitness, and lifestyle markers. Free, private health calculator.
Adjusted Age Calculator | Premature Baby Corrected Age
Calculate corrected/adjusted age for premature babies from birth date, due date, and current date. Compare chronological vs adjusted age instantly.
Age Difference Calculator | MTF
Calculate exact age difference in years, months, and days between two dates or two people. Free, private online age gap calculator.
Accelerated Aging Calculator | MTF
Estimate product shelf life with accelerated aging calculations. Enter temperature, time & Q10 factor for instant aging equivalence results. Free, no sign-up.
Age Graded Running Calculator | MiniToolsFactory
Free online Age Graded Running Calculator tool. Fast, accurate, and 100% private client-side calculations.
Running Pace Calculator | MTF
Calculate running pace per mile/km, finish time estimates, and split times for 5k, 10k, half marathon, and marathon races.
Bench Press 1RM Calculator | MTF
Estimate your bench press one-rep max (1RM) using Epley & Brzycki formulas. Generate training percentage charts (50%-95%) instantly.
Calorie Deficit Calculator | MTF
Calculate your daily calorie deficit, BMR, TDEE, and estimated goal weight timeline using the Mifflin-St Jeor equation. Free client-side health tool.
Chronological Age Calculator | MTF
Calculate your exact age today in years, months, weeks, days, hours, and minutes. Free, instant browser-based age calculator.
Little League Age Calculator | MTF
Determine your child's official Little League Baseball & Softball league age for the current season. Free league age determination tool.
Menopause Age Calculator | MTF
Estimate your menopause onset age & perimenopause transition window based on family history, smoking, BMI, and reproductive factors. Free & private.
Pearson Age Calculator | Exam Age & Eligibility Check
Calculate exact age for Pearson VUE exams, PTE Academic, NCLEX, SAT, GRE, NEET, IT certifications. Verify exam age rules & eligibility instantly.
Lunar Age Calculator | MTF
Calculate your exact Chinese Lunar age, lunar birth date, and zodiac sign based on the traditional lunar calendar. Free online calculator.
Clinical Standards, Body Composition & Athletic Optimization
Our Health & Fitness suite integrates validated formulas from the CDC, WHO, and WMA into instant, client-side tools. No personal biometric data or medical inputs ever leave your browser.
🩺 Clinical & Epidemiological Benchmarks
Evaluate pediatric growth percentiles using CDC LMS parameters and WHO adult Body Mass Index classification standards with precision metric & imperial support.
🏃 Longevity & Athletic Performance Metrics
Calculate metabolic age via Harris-Benedict BMR, determine WMA age-graded running race performance, and estimate one-rep max strength curves across scientific formulas.
Authoritative Health Guides & Methodologies
CDC Pediatric BMI Growth Charts & LMS Z-Score Formula
Understanding Cole's LMS transformation, Z-score math, and 2022 Extended Growth Charts for youth aged 2-19.
U.S. Navy Body Fat Formula: Mathematical Equations & Protocol
How the Hodgdon-Beckett circumference equations work (DoDI 1308.03) and how they perform against DEXA scans.