All Calculators by Category
Explore our full directory of free health and wellness calculators, organized by topic.
Nutrition & Metabolism
31 Calculators- Basal Metabolic Rate (BMR) CalculatorEstimate your basal metabolic rate (BMR)—resting calorie...
- Total Daily Energy Expenditure (TDEE) CalculatorCalculate your Total Daily Energy Expenditure (TDEE) and...
- Calorie Deficit & Weight Loss CalculatorCalculate your daily calorie target for weight loss from...
- Reverse Diet CalculatorBuild a gradual reverse diet plan—weekly calorie bumps...
- Healthy Weight Gain & Muscle Building CalculatorCalculate your daily calorie surplus and target for...
- Muscle Gain / Bulking Macro CalculatorCalculate bulking calories and macro split for lean,...
- Body Recomposition CalculatorCalculate recomp calories and macros to lose fat and...
- Calorie CalculatorEstimate your daily calorie needs based on your age,...
- Ketogenic Diet Macro & Calorie CalculatorCalculate keto macros—daily calories, fat, protein, and...
- Macronutrient & Calorie CalculatorCalculate your daily calorie needs and get a personalized...
- Micronutrient Deficiency Risk CalculatorEstimate your risk of micronutrient deficiencies based on...
- Vitamin D Deficiency Risk Assessment CalculatorAssess your vitamin D deficiency risk for the Indian...
- Iron Deficiency / Anemia Risk CalculatorAssess your iron deficiency and anemia risk for the...
- Magnesium Deficiency Risk CalculatorAssess your magnesium deficiency risk using lifestyle,...
- Protein Target CalculatorCalculate daily protein targets in grams from body...
- Creatine Dosage CalculatorCalculate daily creatine monohydrate dose from body...
- GLP-1 Protein & Muscle Preservation CalculatorGLP-1–focused protein targets (1.6–2.2 g/kg), muscle...
- GLP-1 Weight Loss Timeline CalculatorEstimate weeks to goal weight on semaglutide,...
- Fiber Intake CalculatorCalculate daily dietary fiber targets in grams from TDEE...
- Carbohydrate Intake CalculatorCalculate daily carbohydrate targets in grams from...
- Fat Intake CalculatorCalculate daily dietary fat targets in grams from TDEE at...
- Sodium Intake CalculatorEstimate daily sodium from diet habits—compare to WHO/AHA...
- Caffeine Intake CalculatorEstimate daily caffeine from coffee, tea, energy drinks &...
- Glycemic Load CalculatorCalculate meal glycemic load from GI and carb...
- Daily Water Intake CalculatorCalculate your ideal daily water intake based on your...
- Dehydration Risk CalculatorAssess your dehydration risk from fluid intake, climate,...
- GERD (Gastroesophageal Reflux Disease) Risk CalculatorAssess GERD (Gastroesophageal Reflux Disease) risk from...
- Chronotype & Meal Timing CalculatorDetermine your ideal meal times based on your chronotype...
- Intermittent Fasting Schedule & Calorie CalculatorPlan 16:8, 18:6, 20:4, 5:2, or OMAD fasting schedules...
- Corrected Calcium CalculatorEstimate albumin-corrected total calcium using the Payne...
- Anion Gap CalculatorCalculate serum anion gap from sodium, chloride, and...
Body Composition
16 Calculators- Body Mass Index (BMI) CalculatorCalculate your Body Mass Index (BMI) from height and...
- Child BMI CalculatorCalculate BMI-for-age percentile for children and teens...
- Ideal Body Weight CalculatorCalculate ideal weight for your height using Devine,...
- Body Fat Percentage CalculatorCalculate your body fat to understand your fitness level...
- Waist-to-Height Ratio (WHtR) CalculatorCalculate waist-to-height ratio (WHtR) from waist and...
- Waist-to-Hip Ratio (WHR) Health Risk CalculatorCalculate waist-to-hip ratio (WHR) from waist and hip...
- Body Shape Calculator (Apple, Pear, Hourglass, Rectangle)Find your body shape from shoulder, bust, waist, and hip...
- Lean Body Mass (LBM) CalculatorEstimate lean body mass (fat-free mass) from weight,...
- FFMI Calculator (Fat-Free Mass Index)Calculate Fat-Free Mass Index from weight, height, and...
- Visceral Fat Risk CalculatorEstimate visceral (abdominal) fat risk using...
- Fatty Liver Risk CalculatorAssess NAFLD/MASLD fatty liver risk from BMI, waist,...
- Fatty Liver Severity CalculatorCalculate the Hepatic Steatosis Index (HSI) from ALT,...
- NAFLD Fibrosis Score (NFS) CalculatorCalculate the NAFLD Fibrosis Score from age, BMI,...
- FIB-4 Liver Fibrosis CalculatorCalculate the FIB-4 index from age, AST, ALT and platelet...
- Sarcopenia Risk CalculatorScreen sarcopenia with the validated SARC-F questionnaire...
- Osteoporosis Risk CalculatorScreen osteoporosis with validated OST, SCORE (women) and...
Fitness & Cardio
13 Calculators- Weight Loss Goal & Timeline CalculatorProject your weight loss timeline from current and goal...
- Daily Steps Target CalculatorGet a personalized daily step goal for weight loss,...
- Walking to Lose Weight CalculatorCalculate how much to walk to lose weight—daily steps,...
- Calories Burned During Exercise CalculatorEstimate calories burned during walking, running,...
- Rucking Calories CalculatorEstimate calories burned rucking with a weighted...
- VO2 Max & Longevity CalculatorEstimate your VO2 Max to assess cardiovascular fitness...
- Heart Rate Zone CalculatorCalculate five heart rate training zones with Zone 2...
- Zone 2 Cardio Training CalculatorZone 2 aerobic BPM targets, weekly volume by fitness...
- Recovery Heart Rate CalculatorMeasure post-exercise heart rate recovery—1- or 2-minute...
- HRV Recovery & Readiness CalculatorScore training readiness from morning HRV vs baseline,...
- Running Pace & Race Time CalculatorCalculate running pace per km and per mile, finish time,...
- One Rep Max (1RM) Strength CalculatorEstimate your one-rep max from weight and reps for bench...
- Push-Up Test CalculatorScore your push-up fitness by age and sex—with YMCA/ACSM...
Sleep & Circadian Health
6 Calculators- Sleep Debt CalculatorEstimate your sleep debt by comparing your actual sleep...
- Sleep Cycle CalculatorFind the best bedtime or wake-up time using 90-minute...
- Jet Lag Recovery CalculatorEstimate jet lag recovery days after time-zone...
- Sleep Efficiency CalculatorCalculate your sleep efficiency percentage from time in...
- Sleep Apnea Risk CalculatorScreen obstructive sleep apnea (OSA) risk with the...
- Blue Light Exposure CalculatorEstimate your daily blue light exposure based on screen...
Aging & Longevity
6 Calculators- Biological Age CalculatorEstimate your biological age based on lifestyle, health,...
- Metabolic Age CalculatorCalculate your metabolic age based on your BMR, body...
- Longevity Score CalculatorFree 0–100 longevity score from six lifestyle pillars:...
- Life Expectancy & Longevity Risk CalculatorEstimate your life expectancy based on your age, gender,...
- Frailty Index CalculatorCalculate your Rockwood Frailty Index with a 40-item...
- Fall Risk Assessment CalculatorScreen fall risk with CDC STEADI questions,...
Heart & Metabolic Health
23 Calculators- Heart Age CalculatorCalculate your heart's biological age based on...
- ASCVD 10-Year Risk CalculatorCalculate 10-year ASCVD risk using validated 2013 ACC/AHA...
- Framingham Risk Score CalculatorOfficial Framingham risk score with 2008 General CVD...
- Coronary Heart Disease Risk CalculatorCHD-focused 10-year risk calculator with Wilson 1998 Hard...
- Cardiovascular Risk CalculatorEstimate heart disease and stroke screening risk from...
- Type 2 Diabetes Risk Assessment CalculatorAssess type 2 diabetes risk using the Indian Diabetes...
- Insulin Resistance (HOMA-IR) CalculatorCalculate HOMA-IR from fasting glucose and fasting...
- HbA1c ↔ Average Blood Glucose CalculatorConvert HbA1c (%) to estimated average glucose (eAG) and...
- Kidney Function (eGFR) CalculatorEstimate your kidney function by calculating your...
- Creatinine Clearance (Cockcroft-Gault) CalculatorEstimate creatinine clearance (CrCl) using the...
- BUN/Creatinine Ratio CalculatorCalculate BUN/creatinine ratio from blood urea nitrogen...
- NLR (Neutrophil-to-Lymphocyte Ratio) CalculatorCalculate NLR from CBC absolute neutrophil and lymphocyte...
- Thyroid Disorder Risk Assessment CalculatorFree thyroid risk calculator & symptoms checker: weighted...
- Blood Pressure Interpreter & Risk CalculatorInterpret blood pressure with AHA/ACC 2017 categories,...
- Pulse Pressure CalculatorCalculate pulse pressure from systolic and diastolic BP.
- Mean Arterial Pressure (MAP) CalculatorCalculate MAP from systolic and diastolic BP.
- Cholesterol Level Interpreter & Heart Risk CalculatorInterpret cholesterol with AHA/ACC lipid thresholds,...
- Triglyceride/HDL Ratio CalculatorCalculate triglyceride/HDL ratio from fasting lipids for...
- LDL Cholesterol Calculator (Friedewald)Estimate LDL cholesterol from total cholesterol, HDL, and...
- Non-HDL Cholesterol CalculatorCalculate non-HDL cholesterol from total cholesterol and...
- Atherogenic Index of Plasma (AIP) CalculatorCalculate AIP (log₁₀ TG/HDL in mmol/L) from fasting...
- ApoB Heart Risk CalculatorInterpret ApoB (apolipoprotein B) for atherogenic...
- Metabolic Syndrome Risk CalculatorScreen metabolic syndrome with all 5 harmonized...
Mental Wellbeing
4 Calculators- Stress Load CalculatorEstimate your daily stress load based on your sleep, work...
- Mental Wellbeing & Burnout Risk CalculatorEvaluate your mental wellbeing, stress levels, and...
- Attention Deficit Hyperactivity Disorder (ADHD) Adult Screening CalculatorScreen adult Attention Deficit Hyperactivity Disorder...
- GAD-7 Anxiety Screening CalculatorScreen generalized anxiety with the validated GAD-7...
Women's Health
10 Calculators- Fertility & Ovulation CalculatorTrack your menstrual cycle to predict fertile days and...
- Period & Menstrual Cycle CalculatorEnter last period date, cycle length, and period...
- Cycle Syncing Workout & Nutrition CalculatorPhase-matched workouts and nutrition for menstrual,...
- Menopause Symptom CalculatorAssess menopause symptoms with the validated Menopause...
- Polycystic Ovary Syndrome Risk CalculatorScreen for polycystic ovary syndrome (PCOS) using cycle...
- Pregnancy Due Date CalculatorEstimate your due date (EDD) and gestational age from...
- Conception Date CalculatorEstimate when you conceived from LMP, due date,...
- Pregnancy Weight Gain CalculatorEnter pregnancy week, twins yes/no, height, weight before...
- Pregnancy Calorie Calculator (by Trimester)Enter gestational week, height, weight, activity—see...
- Postpartum Calorie & Nutrition CalculatorEstimate postpartum daily calories with breastfeeding...
Environment & Lifestyle
6 Calculators- Air Quality Exposure CalculatorEstimate your daily air quality exposure based on...
- Smoking Cost & Health Impact CalculatorCalculate daily, monthly & yearly cigarette spend in INR,...
- Pack-Year Smoking CalculatorCalculate clinical pack-years from cigarettes per day and...
- COPD (Chronic Obstructive Pulmonary Disease) Risk Assessment CalculatorScreen for COPD (Chronic Obstructive Pulmonary Disease)...
- Lung Age CalculatorCalculate spirometric lung age from FEV₁, height, age &...
- Alcohol Calories & Health Impact CalculatorCalculate weekly alcohol units vs WHO 14-unit safe limit,...