Health & Fitness Calculators110 calculators
Staying on top of your health and fitness goals gets a lot easier with the right tools. This collection covers everyday needs, from working out your BMI and calorie requirements to mapping out new exercise plans. These calculators break down common health questions and help you make sense of your numbers, whether you're developing a training regimen, tracking weight changes, or just curious about how daily habits add up. Take a look and see how managing your well-being can fit easily into your routine.
Alcohol
Blood Alcohol Content Calculator
Estimate your Blood Alcohol Content (BAC) using the Widmark formula based on drinks consumed, body weight, gender, and time elapsed.
Sobriety Calculator
Calculate your sober time in days, months, and years from your sobriety date. Track milestones and celebrate your progress.
Standard Drink Calculator
Calculate the number of standard drinks in any alcoholic beverage from its volume and ABV. One US standard drink contains 14 grams of pure alcohol.
Biology
Body Composition
BMI Calculator
Calculate your Body Mass Index (BMI) using weight and height with WHO classification.
BMI Prime Calculator
Calculate your BMI Prime, the ratio of your BMI to the upper limit of normal BMI (25), for a quick assessment of weight status.
Body Fat Percentage Calculator
Estimate your body fat percentage using the U.S. Navy method based on body circumference measurements.
Body Frame Size Calculator
Determine your body frame size (small, medium, or large) using elbow breadth and height measurements based on NHANES data.
Body Shape Calculator
Determine your body shape (apple, pear, hourglass, rectangle, inverted triangle) from bust, waist, and hip measurements using ratio-based classification.
Body Surface Area Calculator
Calculate your body surface area (BSA) using the Mosteller, DuBois, and Haycock formulas for medical dosing and physiological calculations.
Calories Burned by Activity Calculator
Calculate calories burned during various physical activities using MET values, your body weight, and exercise duration.
Child BMI Percentile Calculator
Calculate BMI-for-age percentile for children and teens aged 2-20 using CDC growth chart reference data.
Child Height Calculator
Predict your child's adult height using the mid-parental height method based on the heights of both biological parents.
FFMI Calculator
Calculate your Fat-Free Mass Index (FFMI) and adjusted FFMI to assess muscular development relative to height.
Ideal Body Weight Calculator
Calculate your ideal body weight using the Devine formula based on your height and gender.
Lean Body Mass Calculator
Calculate your lean body mass using the Boer, James, and Hume formulas based on gender, weight, and height.
Lose 5 Pounds in 2 Weeks Calculator
Plan a realistic 14-day calorie deficit to lose 5 pounds, with TDEE-based daily calorie targets, macro split, and exercise-burn estimates.
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR) to assess cardiometabolic health risk. Research shows WHtR is a stronger predictor than BMI for heart disease and diabetes.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) to assess abdominal obesity and cardiovascular disease risk based on WHO guidelines.
Weight Loss Calculator
Calculate how long it will take to reach your target weight based on your daily calorie deficit and current weight.
Weight Loss Percentage Calculator
Calculate the percentage of body weight you have lost and determine clinical significance of your weight loss.
Cardiovascular
ASCVD Risk Calculator
Calculate your 10-year atherosclerotic cardiovascular disease risk using the Pooled Cohort Equations. Factors include age, sex, race, cholesterol, blood pressure, diabetes, and smoking.
Blood Pressure Calculator
Classify your blood pressure reading according to the American Heart Association (AHA) and ACC/AHA 2017 guidelines.
Cardiac Output Calculator
Calculate cardiac output from heart rate and stroke volume. Also shows cardiac index when body surface area is provided.
CHA2DS2-VASc Calculator
Calculate CHA2DS2-VASc score to estimate annual stroke risk in patients with non-valvular atrial fibrillation and guide anticoagulation decisions.
Cholesterol Ratio Calculator
Calculate your cholesterol ratios (Total/HDL, LDL/HDL, Triglyceride/HDL) and cardiovascular risk assessment per AHA guidelines.
Corrected QT Calculator
Calculate corrected QT interval (QTc) using Bazett's and Fridericia's formulas from QT interval and heart rate measurements.
Framingham Cardiovascular Risk Calculator
Estimate your 10-year cardiovascular disease risk using the simplified Framingham Risk Score based on age, cholesterol, blood pressure, and risk factors.
Heart Rate Zone Calculator
Calculate your 5 heart rate training zones using the Karvonen formula with max HR and resting HR. Choose between age-based or custom max HR.
Heart Rate Zones Calculator
Calculate your target heart rate training zones using the Karvonen method based on age and resting heart rate.
Mean Arterial Pressure (MAP) Calculator
Calculate Mean Arterial Pressure from systolic and diastolic blood pressure readings with clinical interpretation.
PVR Calculator
Calculate Pulmonary Vascular Resistance from mean pulmonary artery pressure, wedge pressure, and cardiac output.
RCRI Calculator
Calculate Revised Cardiac Risk Index (Lee Index) to estimate perioperative cardiac risk for patients undergoing non-cardiac surgery.
Wells Score Calculator
Calculate the Wells Score for deep vein thrombosis (DVT) probability. Assess clinical criteria to determine low, moderate, or high risk of DVT.
Clinical
Berg Balance Test Calculator
Score the Berg Balance Scale (BBS) with all 14 items. Total score from 0 to 56 assesses fall risk in older adults and neurological patients.
Free Testosterone Calculator
Estimate free and bioavailable testosterone from total testosterone, SHBG, and albumin using the Vermeulen method.
GIR Calculator
Calculate Glucose Infusion Rate (GIR) for IV dextrose solutions. Used in neonatal, pediatric, and adult critical care for glucose delivery management.
Glasgow Coma Scale (GCS) Calculator
Calculate the Glasgow Coma Scale score to assess level of consciousness based on eye, verbal, and motor responses.
Ibuprofen Dosage Calculator
Calculate safe ibuprofen dosing by weight and age for adults and children, including tablet and liquid formulations.
MCA Calculator
Calculate middle cerebral artery peak systolic velocity (MCA-PSV) multiples of the median (MoM) for fetal anemia screening by gestational age.
Pack-Year Calculator
Calculate your smoking history in pack-years to quantify lifetime tobacco exposure and assess associated health risks.
TI-RADS Calculator
Calculate ACR TI-RADS score for thyroid nodule risk stratification based on ultrasound features including composition, echogenicity, shape, margin, and echogenic foci.
Tidal Volume Calculator
Calculate ideal tidal volume for mechanical ventilation based on ideal body weight and target mL/kg.
Tinetti Calculator
Score the Tinetti Balance and Gait Assessment (POMA) to evaluate fall risk in older adults. Scores range from 0-28.
Diabetes
Blood Sugar Converter
Convert blood sugar levels between mg/dL (US) and mmol/L (international) with fasting and post-meal classification ranges.
HbA1c Calculator
Convert HbA1c to estimated average blood glucose (eAG) and vice versa using the ADAG study formula, with diabetes classification.
HOMA-IR Calculator
Calculate Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) from fasting insulin and fasting glucose levels.
Insulin Dose Calculator
Calculate insulin correction and meal bolus doses based on blood glucose, target glucose, correction factor, and carbohydrate intake.
Digestive System
AST/ALT Ratio Calculator
Calculate the De Ritis ratio (AST/ALT) for liver disease differential diagnosis. Helps distinguish between alcoholic and non-alcoholic liver conditions.
FIB-4 Calculator
Calculate FIB-4 index for liver fibrosis staging using age, AST, ALT, and platelet count. Non-invasive alternative to liver biopsy.
MELD Score Calculator
Calculate the Model for End-Stage Liver Disease (MELD) score used for liver transplant prioritization. Uses bilirubin, INR, and creatinine lab values.
Dosage
Carboplatin Calculator
Calculate carboplatin dose using the Calvert formula based on target AUC and GFR. Also shows dose capped at GFR 125 mL/min per FDA guidance.
Drug Half-Life Calculator
Calculate how much medication remains in your body over time using drug half-life elimination kinetics.
Medication Dosage by Weight Calculator
Calculate weight-based medication dosages for adults and children using standard mg/kg dosing protocols.
MME Calculator
Calculate Morphine Milligram Equivalents (MME) for opioid prescriptions using CDC conversion factors. Convert between common opioids.
Peptide Dosage Calculator
Calculate reconstitution volume and injection dosing for research peptides. Given vial amount, water volume, and desired dose, find the injection volume in units and mL.
Tylenol (Acetaminophen) Dosage Calculator
Calculate safe acetaminophen (Tylenol) dosing by weight and age for adults and children, including tablet and liquid formulations.
Electrolytes & Fluids
Anion Gap Calculator
Calculate the serum anion gap and albumin-corrected anion gap from sodium, chloride, bicarbonate, and albumin lab values.
Corrected Calcium Calculator
Calculate albumin-corrected calcium levels to determine true calcium status in patients with low albumin.
IV Drip Rate Calculator
Calculate intravenous drip rate in drops per minute and mL per hour based on fluid volume, infusion time, and tubing drop factor.
Parkland Formula Calculator
Calculate burn fluid resuscitation requirements using the Parkland formula for thermal burn injuries.
Hematology
ANC Calculator
Calculate Absolute Neutrophil Count from white blood cell count and neutrophil differential to assess immune function and neutropenia risk.
Blood Type Calculator
Predict possible blood types for a child based on both parents' ABO blood types and Rh factors using Mendelian genetics.
Iron Deficiency Calculator
Calculate total iron deficit using the Ganzoni formula and estimate supplementation duration for iron deficiency anemia treatment.
Military Fitness
Air Force PT Calculator
Score the USAF Physical Fitness Assessment (PFA) for 1.5-mile run, push-ups, sit-ups, and waist measurement. Scoring by age group and gender.
APFT Calculator
Calculate your Army Physical Fitness Test score. Enter push-ups, sit-ups, and 2-mile run time by age group to get your total APFT score and pass/fail status.
Army Body Fat Calculator
Calculate your body fat percentage using the U.S. Army circumference-based method (AR 600-9) with neck, waist, and hip measurements.
Navy Body Fat Calculator
Calculate body fat percentage using the US Navy circumference method. Uses neck, waist, and hip measurements with the DoD standard formula.
Navy PRT Calculator
Score the Navy Physical Readiness Test (PRT) for push-ups, forearm plank, and 1.5-mile run or cardio alternative by age group and gender.
Nutrition
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation to find how many calories your body burns at rest.
Caffeine Intake Calculator
Track your daily caffeine intake from coffee, tea, energy drinks, and supplements. Check if you are within FDA safe limits.
Calorie Deficit Calculator
Calculate the daily caloric deficit needed for weight loss based on your current weight, goal weight, timeframe, and activity level.
Carbohydrate Calculator
Calculate your daily carbohydrate needs based on calorie intake, dietary goal, and activity level.
Daily Calorie Needs Calculator
Calculate your daily calorie requirements based on age, gender, weight, height, and activity level using the Mifflin-St Jeor equation.
Daily Protein Intake Calculator
Calculate your recommended daily protein intake based on body weight, activity level, and fitness goals.
Daily Water Intake Calculator
Calculate your recommended daily water intake based on body weight, activity level, and climate.
DRI Calculator
Calculate your Dietary Reference Intakes for key nutrients based on your age, sex, and life stage.
Fat Intake Calculator
Calculate your recommended daily fat intake in grams based on calorie consumption, dietary goal, and activity level.
Fiber Intake Calculator
Calculate your recommended daily fiber intake based on age, gender, and calorie consumption using IOM guidelines.
Keto Macro Calculator
Calculate your ketogenic diet macronutrient targets for fat, protein, and carbohydrates based on your TDEE and keto ratio preferences.
Macro Calculator
Calculate your daily macronutrient targets (protein, carbs, fat) based on your TDEE and diet type.
Maintenance Calorie Calculator
Calculate your daily maintenance calories (TDEE) with macronutrient breakdown using the Mifflin-St Jeor equation.
TDEE Calculator
Calculate your Total Daily Energy Expenditure based on BMR and activity level to find your daily calorie needs.
Vitamin D Intake Calculator
Calculate your recommended daily vitamin D intake based on age, current levels, sun exposure, and skin tone.
Weight Gain Calculator
Calculate the daily caloric surplus needed for healthy weight gain based on your body stats, goal weight, and timeframe.
Pediatric
Pregnancy/Reproductive
APGAR Score Calculator
Calculate the APGAR newborn assessment score based on heart rate, respiratory effort, muscle tone, reflex response, and skin color.
Bishop Score Calculator
Calculate the Bishop Score to assess cervical readiness for labor induction. Scores 5 factors: dilation, effacement, station, consistency, and position.
Breastfeeding Calorie Calculator
Calculate the extra calories needed while breastfeeding, estimated milk production, and hydration requirements for nursing mothers.
Conception Date Calculator
Estimate your conception date from your due date or last menstrual period, adjusted for your cycle length.
Gestational Age Calculator
Calculate gestational age and pregnancy milestones based on the number of days since your last menstrual period (LMP).
Implantation Calculator
Estimate when embryo implantation is most likely to occur based on your ovulation date or last menstrual period.
IVF Due Date Calculator
Calculate your estimated due date and current gestational age from your IVF embryo transfer date and embryo age.
Ovulation Calculator
Estimate your ovulation date and fertile window based on your menstrual cycle length and days since your last period.
Period/Menstrual Cycle Calculator
Track and predict your menstrual cycle phases, next period date, and fertile window based on your average cycle length and period duration.
Pregnancy Due Date Calculator
Estimate your pregnancy due date using Naegele's rule based on the first day of your last menstrual period.
Pregnancy Test Calculator
Calculate when to take a pregnancy test for the most accurate result based on your cycle length and last period date.
Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on pre-pregnancy BMI using IOM (Institute of Medicine) guidelines.
Reverse Due Date Calculator
Estimate your conception date from a known due date by working backward through Naegele's rule.
Sleep
Epworth Sleepiness Scale Calculator
Assess your daytime sleepiness level using the validated Epworth Sleepiness Scale questionnaire with clinical interpretation.
REM Sleep Calculator
Calculate ideal bedtime and wake-up times to maximize REM sleep cycles. REM sleep increases in later cycles, typically peaking in the 4th and 5th 90-minute cycles.
Sleep Calculator
Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles. Get recommendations for 4, 5, or 6 complete cycles.
Sleep Cycle Calculator
Calculate optimal bedtimes and wake times based on 90-minute sleep cycles to wake up feeling refreshed and avoid sleep inertia.
Sleep Debt Calculator
Calculate your accumulated sleep deficit based on your ideal and actual sleep hours, with recovery time estimates.
Urology & Nephrology
Adrenal Washout Calculator
Calculate absolute and relative adrenal washout percentages from CT attenuation values to help differentiate adenomas from non-adenomas.
BUN/Creatinine Ratio Calculator
Calculate the BUN-to-creatinine ratio to help distinguish prerenal azotemia from intrinsic renal causes of kidney injury.
Creatinine Clearance Calculator
Estimate creatinine clearance and kidney function using the Cockcroft-Gault equation based on age, weight, sex, and serum creatinine.
FENa Calculator
Calculate Fractional Excretion of Sodium to differentiate prerenal from intrinsic renal causes of acute kidney injury.
GFR Calculator
Calculate your estimated Glomerular Filtration Rate (eGFR) using the CKD-EPI 2021 equation to assess kidney function.