Your health, calculated.
Science-backed health calculators. No sign-up. Instant results.
Body Composition
BMI Calculator
Check if your weight is in a healthy range.
Body Fat Calculator
Estimate your body fat percentage.
Ideal Weight Calculator
Find your healthy weight range.
Waist-to-Hip Ratio
Assess your health risk with WHO guidelines.
Waist-to-Height Ratio
Waist-to-height ratio (WHtR) — a stronger predictor of metabolic risk than BMI.
Lean Body Mass Calculator
Calculate your lean body mass.
FFMI Calculator
Calculate Fat-Free Mass Index — gauge your muscle mass relative to height.
Body Surface Area Calculator
Calculate body surface area using Du Bois, Mosteller, and other formulas.
Body Type Calculator
Determine your somatotype: ectomorph, mesomorph or endomorph.
BMI Calculator Women
Calculate BMI with women-specific context and guidance.
BMI Calculator Men
Calculate BMI with muscle-mass and abdominal-fat context.
Nutrition & Energy
BMR Calculator
Calculate the calories your body burns at rest.
TDEE Calculator
Find your daily calorie needs.
Macro Calculator
Get your ideal protein, carb, and fat split.
Water Intake Calculator
How much water should you drink daily?
Calorie Deficit Calculator
Calculate your daily calorie target for weight loss.
Protein Calculator
Find your optimal daily protein intake.
Calories Burned Calculator
Calculate how many calories you burn during different activities.
Protein Need Calculator
Calculate your daily protein requirement by activity, goal, and age.
Caffeine Calculator
Track your current caffeine level and find out when you can safely sleep.
Intermittent Fasting Calculator
Calculate your eating and fasting windows for your protocol.
Keto Calculator
Calculate your keto macros for the ketogenic diet.
Child Calorie Needs Calculator
Daily calorie needs for children (ages 1–18) by age, sex, height, weight and activity level — IOM formula.
Fitness & Recovery
Heart Rate Zones
Discover your training heart rate zones.
Sleep Cycle Calculator
Find your optimal bedtime or wake time.
Blood Pressure Calculator
Check your blood pressure category instantly.
MAP Calculator
Compute mean arterial pressure (MAP) from systolic and diastolic blood pressure.
VO2 Max Calculator
Calculate your maximum oxygen uptake and fitness category.
One Rep Max (1RM) Calculator
Estimate your one-rep max from any lift.
Running Pace Calculator
Calculate your pace, finish time, and splits for any distance.
Blood Alcohol Calculator
Calculate your blood alcohol level and time until sober.
HbA1c Converter
Convert HbA1c to estimated average glucose (eAG) and assess your risk.
HOMA-IR Calculator
Estimate insulin resistance from fasting glucose and fasting insulin.
Blood Sugar Converter
Convert blood sugar between mg/dL and mmol/L and classify your reading.
GFR Calculator
Calculate kidney function: eGFR using CKD-EPI 2021, CKD stage, and risk assessment.
Smoking Cost Calculator
Calculate how much your smoking habit costs you per day, month, and year.
Child Growth Percentile
Calculate weight, height and BMI percentiles for children using WHO growth standards.
Head Circumference Percentile
Head circumference percentile for babies and toddlers (0–3 years) by WHO standard.
Pediatric BMI Calculator
BMI for children (ages 2–20) by CDC growth-chart percentile — age- and sex-specific.
Life Expectancy Calculator
Estimate your life expectancy based on lifestyle, health, and genetics.
Diabetes Risk Calculator
Calculate your type 2 diabetes risk using the validated FINDRISC score.
Biological Age Calculator
Estimate your biological age based on lifestyle, heart rate, sleep, and health status.
Vitamin D Calculator
Find out how many minutes of sun you need daily to produce enough vitamin D.
Alcohol Unit Calculator
Calculate your weekly alcohol consumption in UK units, grams of pure alcohol, and health risk.
Body Temperature Calculator
Convert body temperature between °C and °F and interpret fever, normal, and hypothermia ranges.
Anion Gap Calculator
Calculate anion gap and classify metabolic acidosis. Includes albumin correction.
Sodium Correction Calculator
Corrected serum sodium for hyperglycemia. Hillier and Katz formulas.
Child Dosage Calculator
Weight-based paediatric dosing for paracetamol, ibuprofen and amoxicillin.
Cholesterol Ratio Calculator
Calculate Total, LDL and Triglyceride to HDL ratios with risk classification.
Prostate Cancer Risk Calculator
Estimate prostate cancer risk from PSA, age and family history.
Testosterone Level Calculator
Calculate free testosterone from total T, SHBG and albumin (Vermeulen formula).
Erectile Dysfunction Calculator
IIEF-5 (SHIM) questionnaire — validated 5-question screening tool for erectile dysfunction.
Male Pattern Baldness Calculator
Norwood-Hamilton scale — self-assess male androgenetic alopecia in 4 questions, get stage 1–7.
Cardiovascular Risk Calculator
Estimate your 10-year risk of heart attack or stroke (Framingham).
Stroke Risk Calculator
CHA₂DS₂-VASc score to estimate annual stroke risk in atrial fibrillation.
Blood Alcohol Estimator
Quick BAC estimate from standard drinks, weight and time.
Dehydration Risk Calculator
Estimate your dehydration risk from fluid intake, body weight, and symptoms.
Heart Failure Risk Calculator
Estimate your 10-year heart failure risk from age, BMI, and risk factors.
Thyroid Function Calculator
Enter TSH, free T3 and T4 to interpret thyroid function with ATA reference ranges.
Anemia Risk Calculator
Estimate your anemia risk from hemoglobin level, sex, and clinical symptoms.
Osteoporosis Risk Calculator
FRAX-based 10-year fracture risk estimate from age, BMI, and clinical risk factors.
Hepatitis Risk Calculator
Estimate your hepatitis B and C risk from exposure factors.
Corrected Calcium Calculator
Calculate albumin-corrected serum calcium — accurate classification in hypoalbuminemia.
Asthma Control Test (ACT)
Calculate your ACT score — assess asthma control over the past 4 weeks.
COPD Assessment (CAT, mMRC, GOLD)
Combine mMRC, CAT and exacerbations to find your GOLD 2023 group (A/B/E).
Creatinine Clearance Calculator
Cockcroft-Gault formula — estimate creatinine clearance and kidney function.
Pain Scale Calculator
NRS, VAS, and Wong-Baker — rate and classify pain intensity.
Pediatric Blood Pressure Calculator
Blood pressure percentile for children and adolescents — AAP 2017 screening table.
Steps to Calories Calculator
How many calories does 10000 steps burn? Convert steps to km — free, instant.
Iron Deficiency Calculator
Screen for iron deficiency from ferritin, transferrin saturation, hemoglobin and symptoms.
Breast Cancer Risk Calculator
Estimate your 5-year breast cancer risk using the Gail model.
Pregnancy
Pregnancy Due Date Calculator
Estimate your due date and track milestones.
Pregnancy Calorie Needs
Calculate your daily calorie needs by trimester.
Ovulation Calculator
Calculate your ovulation date and fertile days.
Pregnancy Weight Gain
Recommended weight gain during pregnancy based on IOM guidelines.
Fertility Window Calculator
Calculate your expanded fertility window with LH surge and daily conception probability.
Pregnancy BMI Calculator
Calculate your pre-pregnancy BMI and classify it per IOM 2009.
Pearl Index Calculator
Calculate the Pearl Index from study data and compare contraceptive methods.
Period Calculator
Predict your next periods and fertile windows.
Due Date Calculator
Calculate your due date from LMP, conception date, or IVF transfer.
PCOS Symptom Checker
Screen for PCOS using the Rotterdam criteria and common symptom patterns.
APGAR Score Calculator
Score a newborn's condition at 1 and 5 minutes using the five APGAR criteria.
Baby Milestones
What developmental milestones to expect by age. Overview based on the CDC framework.
Breast Milk Alcohol Calculator
Calculate when alcohol clears from breast milk after drinking.
Baby Feeding Amount Calculator
Find out how much milk your baby needs per feeding and per day — by age and weight.
Newborn Bilirubin Calculator
Bhutani nomogram — estimate the risk of newborn jaundice (hyperbilirubinemia).
Menopause Symptom Calculator
Score your menopause symptoms with the Menopause Rating Scale (MRS) — hot flushes, mood, urogenital signs.
PMS Symptom Calculator
Score your premenstrual symptoms with the validated PSST questionnaire (PMS/PMDD).