Browse our free collection of health tools
Calculate your Body Mass Index (BMI) using height and weight. Understand your BMI category and what it means for your health.
Calculate your ideal body weight using multiple formulas (Devine, Robinson, Miller, Hamwi). Find a healthy weight range based on your height and sex.
Calculate your body fat percentage using the U.S. Navy method. Enter your measurements to estimate body fat and understand your fitness category.
Calculate your waist-to-hip ratio (WHR) to assess cardiovascular disease risk. A simple measurement used by the WHO as a health indicator.
Calculate your body surface area using Du Bois, Mosteller, and Haycock formulas. BSA is used in clinical medicine for drug dosing and medical calculations.
Calculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Find out how many calories you burn per day based on your activity level.
Calculate your daily macronutrient needs (protein, carbs, fat) based on your TDEE and fitness goals. Get a balanced split for maintenance, cutting, or bulking.
Calculate your recommended daily water intake based on body weight and activity level. Stay properly hydrated with personalized recommendations.
Calculate estimated glomerular filtration rate (eGFR) using the CKD-EPI 2021 equation. Assess kidney function and CKD staging from serum creatinine.
Calculate creatinine clearance (CrCl) using the Cockcroft-Gault equation. Used for renal drug dosing adjustments based on kidney function.
Calculate corrected QT interval using Bazett, Fridericia, and Framingham formulas. Assess QT prolongation risk from ECG measurements.
Calculate the MELD and MELD-Na scores to assess liver disease severity and transplant priority. Uses bilirubin, INR, creatinine, and sodium.
Calculate the Child-Pugh score to classify the severity of chronic liver disease and estimate prognosis. Uses bilirubin, albumin, INR, ascites, and encephalopathy.
Calculate the anion gap and albumin-corrected anion gap to help evaluate metabolic acidosis. Essential for the ER and ICU workup.
Calculate the alveolar-arterial oxygen gradient to evaluate the cause of hypoxemia. Differentiates lung pathology from hypoventilation.
Calculate corrected calcium adjusted for albumin levels. Essential for accurate interpretation of total calcium in hypoalbuminemic patients.
Interpret arterial blood gas (ABG) results to identify acid-base disorders. Determines primary disorder and compensation status from pH, pCO₂, and HCO₃⁻.
Estimate PaO₂ from pulse oximetry SpO₂ readings using the oxygen-hemoglobin dissociation curve approximation.
Convert laboratory values between conventional (US) and SI (international) units. Covers 20 common lab tests.
Calculate your estimated one-rep max using Epley, Brzycki, and Lander formulas. Determine your maximum strength from submaximal lifts.
Calculate your personal heart rate training zones using the Karvonen method. Optimize your cardio training with zones based on age and resting heart rate.
Estimate your VO2 max from resting heart rate using the Uth method. Assess your cardiorespiratory fitness level and aerobic capacity.
Calculate the CHA₂DS₂-VASc score to estimate stroke risk in patients with atrial fibrillation and guide anticoagulation therapy decisions.
Calculate the HAS-BLED score to assess bleeding risk in patients on anticoagulation therapy. Balance stroke prevention against bleeding risk.
Calculate your 10-year risk of cardiovascular disease using the Framingham Risk Score. Based on the landmark Framingham Heart Study data.
Calculate the HEART Score to assess the risk of major adverse cardiac events (MACE) in patients presenting with chest pain.
Calculate the Wells Score to assess the clinical probability of deep vein thrombosis (DVT). Guide diagnostic workup and D-dimer testing.
Calculate the Wells Score to estimate the clinical probability of pulmonary embolism (PE). Guide decisions on CTPA and D-dimer testing.
Calculate the CURB-65 score to assess pneumonia severity and determine the need for hospitalization or ICU admission.
Calculate the Glasgow Coma Scale score to assess level of consciousness. Used worldwide in emergency medicine and trauma assessment.
Calculate the APACHE II score to predict ICU mortality risk. Uses acute physiological variables, age, and chronic health status.
Apply the PERC Rule to rule out pulmonary embolism in low-risk patients without D-dimer testing. Reduces unnecessary testing.
Calculate your estimated due date (EDD) from your last menstrual period using Naegele's rule. Track gestational age and trimester.
Calculate the Bishop Score to assess cervical favorability for labor induction. Predicts likelihood of successful vaginal delivery.
Calculate the Apgar Score to quickly assess newborn health at 1 and 5 minutes after birth. Evaluates appearance, pulse, grimace, activity, and respiration.
Calculate IV infusion rates in mL/hr and drops per minute. Essential nursing and pharmacy calculator for IV fluid administration.
Calculate morphine milligram equivalents (MME) for opioid medications. Assess overdose risk per CDC guidelines.
Calculate pediatric medication doses based on patient weight (mg/kg). Essential for safe pediatric prescribing.
Get warfarin dose adjustment guidance based on current INR and target range. Helps manage anticoagulation therapy.
Convert HbA1c values to estimated average blood glucose (eAG) in mg/dL and mmol/L. Assess glycemic control in diabetes management.
Calculate the insulin correction factor (sensitivity factor) using the 1800 and 1500 rules. Determine how much 1 unit of insulin lowers blood glucose.
Interpret TSH and free T4 values to assess thyroid function. Identifies hypothyroidism, hyperthyroidism, and subclinical conditions.