Health
BMI, BMR, body fat, calorie and pregnancy health calculators.
Free EER Calculator - Estimated Energy Requirement
Use our free EER Calculator online. Estimate your average dietary energy intake needed to maintain energy balance based on age, gender, weight, height, and physical activity level. Updated for 2026.
Free BBT Calculator | Basal Body Temperature
Use our free BBT Calculator online. Adjust your basal body temperature based on waking time differences. Calculate your adjusted temperature and temperature deviation for accurate fertility tracking. Updated for 2026.
Free How to Maintain Weight in Pregnancy Tool
Use our free How to Maintain Weight in Pregnancy tool online. Track your pregnancy weight gain against BMI-based recommendations and get personalized guidance for a healthy pregnancy. Supports metric and imperial units.
Free Net Carbs Calculator
Use our free Net Carbs Calculator online. Calculate net carbohydrates from total carbs, fiber, and sugar alcohols for your keto or low-carb diet. Get calories from net carbs instantly. Updated for 2026.
Free Fielding Percentage Calculator
Use our free Fielding Percentage Calculator online. Calculate baseball fielding percentage (FPCT) from putouts, assists, and errors. Get instant results with total chances and successful plays. Updated for 2026.
Free Frailty Index Calculator
Use our free Frailty Index Calculator online. Calculate the frailty index (FI) from health deficits present and measured to assess frailty risk in geriatric patients. Updated for 2026.
Free Goalie Save Percentage Calculator
Use our free Goalie Save Percentage Calculator online. Calculate the percentage of saves a goaltender makes relative to total shots faced. Perfect for hockey coaches, players, and fans evaluating NHL goalie performance. Updated for 2026.
Free Calories Burned Standing Calculator
Use our free Calories Burned Standing Calculator online. Calculate how many calories you burn by standing based on your weight and duration. Compare standing vs sitting. Updated for 2026.
Free Bike Cadence and Speed Calculator
Use our free Bike Cadence and Speed Calculator online. Calculate cycling speed from cadence or cadence from speed with wheel size, tire size, and gear ratio. Updated for 2026.
Free Fiber Calculator
Use our free Fiber Calculator online. Find out how much dietary fiber you need per day based on your calorie intake. Get your recommended daily fiber intake instantly with the 14g per 1,000 kcal formula.
Free Gorlin Formula Calculator - AVA Calculator
Use our free Gorlin Formula calculator online. Calculate aortic valve area (AVA) from cardiac output, heart rate, systolic ejection period, and mean pressure gradient. Updated for 2026.
Free Morse Fall Scale Calculator
Use our free Morse Fall Scale Calculator online. Evaluate a patient's fall risk based on history of falling, secondary diagnosis, ambulatory aid, IV therapy, gait, and mental status. Updated for 2026.
Free RFM Calculator
Use our free RFM Calculator online. Calculate your Relative Fat Mass using only height and waist circumference. Get instant body fat percentage estimate with interpretation chart. More accurate than BMI for body fat estimation. Updated for 2026.
Free Vaccine Immunity Calculator
Use our free Vaccine Immunity Calculator online. Find out when you will reach full immunity after your vaccination. Calculate your personalized protection timeline for all major vaccine brands. Updated for 2026.
Free NEDOCS Calculator
Use our free NEDOCS Calculator online. Calculate the National Emergency Department Overcrowding Score for your ED with 7 clinical variables. Identify overcrowding levels instantly. Updated for 2026.
Free Reverse Due Date Calculator
Use our free Reverse Due Date Calculator online. Calculate conception date from due date or due date from conception date. Adjustable pregnancy length with weeks or days. Get intercourse window estimates. Updated for 2026.
Free 4Ts Score Calculator
Use our free 4Ts Score Calculator online. Assess the probability of heparin-induced thrombocytopenia (HIT) based on four clinical criteria: thrombocytopenia, timing, thrombosis, and other possible causes. Updated for 2026.
Free BAC Calculator
Use our free BAC Calculator online. Calculate your blood alcohol concentration instantly. Estimate time until sober and legal driving limit. Uses Widmark formula. Updated for 2026.
Free Pokemon Go Weight Loss Calculator
Use our free Pokemon Go Weight Loss Calculator online. Calculate calories burned and weight lost while hatching eggs and walking in Pokemon GO. Supports metric and imperial units. Updated for 2026.
Free AHI Calculator | Apnea-Hypopnea Index
Use our free AHI Calculator online. Calculate your Apnea-Hypopnea Index (AHI) score based on apnea episodes, hypopnea episodes, and sleep time. Assess obstructive sleep apnea (OSA) severity with the AHI scale. Updated for 2026.
Free Local Anesthetic Calculator
Use our free local anesthetic calculator online. Determine the maximum allowable subcutaneous dose of amide-type local anesthetic (bupivacaine, lidocaine, mepivacaine, ropivacaine) without epinephrine based on weight and concentration. Updated for 2026.
Free Passer Rating Calculator
Use our free Passer Rating Calculator online. Compute NFL/CFL quarterback rating (0-158.3 scale) and NCAA passing efficiency for any quarterback's passing stats. Updated for 2026.
Free On Base Percentage Calculator
Calculate OBP with our free On Base Percentage Calculator. Enter hits, walks, HBP, at bats and sacrifice flies to see how often a batter reaches base. Updated for 2026.
Free Arrow FOC Calculator
Use our free Arrow FOC Calculator online. Calculate the front-of-center (FOC) of your arrows instantly. Supports mm, cm, in, ft. Get accurate arrow balance for better archery performance, updated for 2026.
Free Addiction Calculator
Use our free Addiction Calculator online. Estimate how substance use may affect your life expectancy with data-backed insights for alcohol, cigarettes, cocaine, methamphetamine, heroin, and methadone. Updated for 2026.
Free AST ALT Ratio Calculator
Use our free AST ALT Ratio calculator online to quickly assess your liver enzyme ratio. Enter AST and ALT levels from your blood test to get instant results and clinical interpretation. Updated for 2026.
BASDAI Score Calculator
Use our free BASDAI Calculator online. Calculate the Bath Ankylosing Spondylitis Disease Activity Index to assess AS disease activity. Fast, validated, and clinically relevant. Updated for 2026.
Free Anaerobic Threshold Calculator
Use our free Anaerobic Threshold Calculator online. Calculate your anaerobic heart rate based on age using multiple max heart rate formulas. Get your anaerobic threshold zone (80-90% of max HR) and optimize your exercise training intensity. Updated for 2026.
Free INR Calculator
Use our free INR Calculator online. Calculate the International Normalized Ratio from prothrombin time (PT) to assess blood coagulation. Get INR interpretation and normal ranges. Updated for 2026.
Free Hand Sanitizer Calculator
Use our free Hand Sanitizer Calculator online. Calculate how much hand sanitizer your household needs or how long your supplies will last. Fast and accurate. Updated for 2026.
Free Prescription Refill Calculator
Use our free Prescription Refill Calculator online. Calculate your next refill date and days supply for tablets or liquid medications. Plan your pharmacy refills with ease. Updated for 2026.
Free HEART Score Calculator
Use our free HEART Score Calculator online. Assess 6-week MACE risk based on History, ECG, Age, Risk Factors, and Troponin. Fast and accurate cardiac risk stratification for chest pain patients. Updated for 2026.
Free Pack Years Calculator
Use our free Pack Years Calculator online. Calculate your smoking pack years - the standard measure of smoking intensity used by clinicians for lung cancer screening eligibility. Supports custom pack sizes. Updated for 2026.
Free ANC Calculator
Use our free ANC Calculator online. Calculate absolute neutrophil count (ANC) from WBC and differential to assess infection risk and diagnose neutropenia. Updated for 2026.
Free Lung Cancer Risk Calculator for Smokers
Use our free lung cancer risk calculator for smokers online. Estimate your chance of developing lung cancer based on age, smoking history, BMI, daily cough, and smoke exposure. Based on the validated HUNT study (2018). Updated for 2026.
Free Incidence Rate Calculator
Use our free Incidence Rate Calculator online. Calculate disease incidence rates per 1,000, 10,000, 100,000 or 1,000,000 population using the standard incidence rate formula. Updated for 2026.
Free GRACE Calculator
Use our free GRACE Calculator online. Calculate the GRACE risk score and mortality risk for acute coronary syndrome patients using age, vital signs, and clinical parameters. Updated for 2026.
Free Pearl Index Calculator
Use our free Pearl Index Calculator online. Calculate the birth control failure rate and contraceptive effectiveness using the Pearl Index formula based on study size, duration, and pregnancies. Updated for 2026.
Free Calories Burned Calculator
Use our free Calories Burned Calculator online. Calculate calories burned during walking, running, cycling, swimming, and more. Track weight loss from exercise and optimize your fitness routine. Updated for 2026.
Free Bowling Average Calculator
Use our free Bowling Average Calculator online. Calculate cricket bowling performance instantly by entering runs conceded and wickets taken. Get accurate results. Updated for 2026.
Free Implantation Calculator
Use our free Implantation Calculator online to discover your implantation date for natural conception or IVF. Calculate when implantation occurs based on ovulation date or LMP. Updated for 2026.
Free Parkland Formula Calculator
Use our free Parkland formula calculator online to calculate IV fluid requirements for burn patients using the rule of nines. Updated for 2026.
Free Centor Score Calculator
Use our free Centor Score Calculator online. Quickly evaluate the probability of streptococcal pharyngitis based on 5 clinical criteria: fever, tonsillar exudates, lymphadenopathy, cough, and age. Updated for 2026.
Free Cigarette Calculator
Use our free Cigarette Calculator online. Estimate the total number of cigarettes you have smoked in your lifetime based on your daily smoking habits and duration. Track your smoking history and get insights. Updated for 2026.
Free HOMA-IR Calculator
Use our free HOMA-IR Calculator online. Calculate your HOMA-IR and QUICKI indexes from fasting glucose and insulin levels. Assess insulin resistance risk instantly. Updated for 2026.
Free Medicine 3 Times a Day Calculator
Use our free Medicine 3 Times a Day Calculator online. Calculate evenly spaced dosing schedules for 2, 3, or 4 daily doses based on your first dose time. Perfect for prescription timing. Updated for 2026.
Free Protein Calculator
Use our free Protein Calculator online. Calculate your optimal daily protein intake based on body weight, activity level, and fitness goals. Get personalized protein recommendations for muscle gain, weight loss, or general health. Updated for 2026.
Free Geriatric BMI Calculator
Use our free Geriatric BMI Calculator online. Calculate BMI for seniors aged 65+ using specialized geriatric BMI categories. Get healthy weight ranges for elderly adults. Updated for 2026.
Free Osteoporosis Risk Score Calculator
Use our free Osteoporosis Risk Score Calculator online. Calculate your OST, SCORE, and MORES risk scores for osteoporosis with age, weight, and clinical risk factors. Updated for 2026.
Free 5k Pace Calculator
Use our free 5k Pace Calculator online. Calculate your running pace per kilometer or per mile based on your race time and distance. Updated for 2026.
Free BMI in Pregnancy Calculator
Use our free BMI in Pregnancy Calculator online. Calculate your pre-pregnancy BMI and learn the recommended pregnancy weight gain range based on your BMI category. Supports metric and imperial units.
Free Mean Arterial Pressure Calculator
Use our free Mean Arterial Pressure (MAP) calculator online. Calculate MAP from systolic and diastolic blood pressure instantly. Get normal MAP ranges, pulse pressure, and clinical insights for 2026. Updated for 2026.
Free Bladder Volume Calculator
Use our free Bladder Volume Calculator online. Estimate urinary bladder capacity and post-void residual volume from ultrasound dimensions. Supports multiple bladder shapes and unit systems. Updated for 2026.
Free IVF Due Date Calculator
Use our free IVF Due Date Calculator online. Calculate your estimated due date after embryo transfer for Day-3, Day-5, or own egg IVF. Get pregnancy weeks and trimester info. Updated for 2026.
Free Breast Cancer Recurrence Risk Calculator
Use our free breast cancer recurrence risk calculator online. Estimate local recurrence risk based on tumor grade, lymph node status, and lymphatic or vascular invasion. Updated for 2026.
Free Drug Half-Life Calculator
Use our free Drug Half-Life Calculator online. Calculate how long a medication stays in your system using the elimination half-life formula. See remaining dosage and concentration for each half-life cycle. Updated for 2026.
Free Magic Number Calculator
Use our free Magic Number Calculator online. Calculate how many games your baseball team needs to win or the opponent needs to lose to secure the division title or playoff spot. Updated for 2026.
Free MCA Calculator
Use our free MCA Calculator online. Assess the risk of fetal anemia in single and twin pregnancies using MCA peak systolic velocity and gestational age. Updated for 2026.
Free Adrenal Washout Calculator
Use our free Adrenal Washout Calculator online. Calculate absolute and relative adrenal washout from CT Hounsfield units to diagnose adrenal adenoma. Fast CT washout analysis. Updated for 2026.
Free Fundal Height Calculator
Use our free Fundal Height Calculator online. Calculate fundal height percentile by week, estimate gestational age from SFH, or predict fetal birth weight using Johnson's formula. Supports cm, mm, and inch units.
Free Baby's Milk Intake Calculator
Use our free baby's milk intake calculator online. Calculate how much milk your baby needs per day and per feeding based on weight, age group, and feeding frequency. Updated for 2026.
Free DRI Calculator
Use our free DRI Calculator online to compute your daily recommended intake of vitamins, macronutrients, and micronutrients based on age, sex, height, weight, and activity level. Updated for 2026.
Free Ponderal Index Calculator
Use our free Ponderal Index Calculator online. Calculate your Rohrer Index (PI) instantly with metric units. Get healthy PI ranges, weight categories and body composition insights. Updated for 2026.
Free Ibuprofen Dosage Calculator
Use our free Ibuprofen Dosage Calculator online. Calculate the maximum safe single and daily dose of ibuprofen for your child based on their weight. Supports kg and lb. Updated for 2026.
Free CURB-65 Calculator | Pneumonia Severity Score
Use our free CURB-65 Calculator online. Calculate the CURB-65 score for community-acquired pneumonia (CAP) severity based on confusion, blood urea nitrogen, respiratory rate, blood pressure, and age. Assess mortality risk and hospital admission recommendations. Updated for 2026.
Free QTc Calculator
Use our free QTc Calculator online. Calculate corrected QT interval using Bazett, Fridericia, Framingham, and Hodges formulas from QT interval and heart rate. Updated for 2026.
Free Overweight Calculator
Use our free Overweight Calculator online. Calculate your BMI and Ponderal Index instantly to see if you are underweight, normal, overweight, or obese. Updated for 2026.
Free Cholesterol Ratio Calculator
Use our free Cholesterol Ratio Calculator online. Calculate your TC/HDL, LDL/HDL, and triglyceride/HDL ratios from your blood test results instantly. Updated for 2026.
Free Oxygenation Index Calculator
Use our free Oxygenation Index Calculator online. Calculate OI and PaO₂/FiO₂ ratio to assess lung function and ARDS severity with clinical interpretation. Updated for 2026.
Free Lidocaine Dose Calculator
Use our free Lidocaine Dose Calculator online. Calculate the maximum allowable subcutaneous dose of lidocaine based on weight and concentration. Supports kg, lb, oz, stones. Updated for 2026.
Free Metastatic Prostate Cancer Prognosis Calculator
Use our free metastatic prostate cancer prognosis calculator online. Estimate life expectancy and 5-year survival based on Gleason score, metastases, health status, and smoking history. Updated for 2026.
Free Draw Length Calculator
Use our free draw length calculator online. Determine your ideal archery draw length from your wingspan measurement. Get the perfect bow fit for improved accuracy and performance. Updated for 2026.
Free Swimming Calorie Calculator
Use our free Swimming Calorie Calculator online. Calculate calories burned swimming with 14+ strokes including butterfly, breaststroke, freestyle, backstroke, and water aerobics. Get MET-based results for your weight and duration. Updated for 2026.
Free Blood Donor Calculator
Use our free Blood Donor Calculator online. Check blood and plasma compatibility for donating and receiving. Find out who you can donate to or receive from with our instant blood type compatibility checker.
Free Cycling Power Zones Calculator
Use our free Cycling Power Zones Calculator online. Calculate your cycling training zones based on your Functional Threshold Power (FTP). Get your personalized 3-zone, 5-zone, or 7-zone power chart for effective training. Updated for 2026.
Free IV Flow Rate Calculator
Use our free IV Flow Rate Calculator online. Calculate intravenous drip rate and infusion flow rate instantly. Supports drop factor, volume, and time settings. Updated for 2026.
Free Bruce Protocol METs Calculator | Treadmill Stress Test
Use our free Bruce Protocol METs Calculator online. Calculate your METs max, VO2 max, and maximum heart rate based on the Bruce protocol stress test. Interpret your treadmill test results for cardiovascular fitness assessment. Updated for 2026.
Free Simple Calorie Intake Calculator
Use our free Simple Calorie Intake Calculator online. Estimate your daily calorie needs based on your age, gender, height, weight, and activity level. Updated for 2026.
Free RBC Indices Calculator
Use our free RBC Indices Calculator online. Calculate MCV, MCH, and MCHC from hemoglobin, hematocrit, and RBC count. Get instant blood test interpretations with normal range comparisons. Updated for 2026.
Free Air Force PT Calculator
Use our free Air Force PT Calculator online. Calculate your AF PT score including body composition, push-ups, sit-ups, and 1.5-mile run performance. Get your composite score, component scores, and performance level instantly. Updated for 2026.
Free MME Calculator
Use our free MME Calculator online. Convert opioid doses to morphine milligram equivalents (morphine equivalent dose) with our MED calculator supporting 12 opioid drugs. Updated for 2026.
Arterial Blood pH Calculator
Use our free Arterial Blood pH Calculator online. Estimate arterial blood pH from bicarbonate (HCO₃) and PaCO₂ levels using the Henderson-Hasselbalch equation. Instant results for acidosis and alkalosis assessment. Updated for 2026.
Free Sepsis Calculator
Use our free Sepsis Calculator online. Screen for sepsis risk using the qSOFA criteria: altered mental status, systolic blood pressure, and respiratory rate. Get instant risk stratification based on Sepsis-3 Consensus Definitions. Updated for 2026.
Free Gut Microbiome Score Calculator
Use our free Gut Microbiome Score Calculator online. Assess your diet and lifestyle habits to get a personalized gut health score with actionable tips for improving your microbiome. Updated for 2026.
Free Bicarbonate Deficit Calculator
Use our free Bicarbonate Deficit Calculator online. Calculate bicarbonate deficit using the standard formula for metabolic acidosis assessment. Supports kg, lb, and stone weight units. Updated for 2026.
Free NIH Stroke Scale Calculator (NIHSS)
Use our free NIH Stroke Scale (NIHSS) calculator online. Objectively assess stroke-related impairment with the 15-item NIH Stroke Scale. Updated for 2026.
Free Melatonin Dosage Calculator
Use our free Melatonin Dosage Calculator online. Find the right melatonin dosage for your indication including trouble falling asleep, jet lag, insomnia in blind people, beta-blockers insomnia, and endometriosis. Updated for 2026.
Free Dosage Calculator
Use our free Dosage Calculator online. Calculate the appropriate dose of any medication based on your weight, prescribed dosage, and medicine concentration. Updated for 2026.
Free Keto Calculator
Use our free Keto Calculator online. Calculate your optimal keto macros for the ketogenic diet - fat, protein, and carbs based on your body stats and fitness goals. Updated for 2026.
Free RSBI Calculator
Use our free RSBI Calculator (Rapid Shallow Breathing Index) online. Calculate the Yang-Tobin Index to predict successful weaning from mechanical ventilation. Get instant results with clinical interpretation. Updated for 2026.
Free Finnegan NAS Score Calculator
Use our free Finnegan NAS Score Calculator online. Assess neonatal abstinence syndrome symptoms across CNS, metabolic, and GI categories. Get the total Finnegan score and treatment recommendation instantly. Updated for 2026.
Free FIB-4 Calculator
Use our free FIB-4 Calculator online. Calculate your liver fibrosis score and APRI ratio using AST, ALT, age, and platelet count. A non-invasive NAFLD assessment tool. Updated for 2026.
Free SAAG Calculator
Use our free SAAG Calculator online. Quickly calculate the serum-ascites albumin gradient to differentiate portal hypertension from other causes of ascites. Updated for 2026.
Free FEV1/FVC Ratio Calculator
Use our free FEV1/FVC Ratio Calculator online. Calculate Tiffeneau index, assess airway obstruction, and check COPD severity. Updated for 2026.
Free ABSI Calculator
Use our free ABSI Calculator (A Body Shape Index) online. Calculate your ABSI score and ABSI z-score to assess premature mortality risk based on age, sex, height, weight, and waist circumference. Get instant results with risk classification. Updated for 2026.
Free Sleep Time Calculator
Use our free Sleep Time Calculator online. Find the best bedtime based on your wake-up time and 90-minute sleep cycles. Wake up refreshed with optimal sleep cycle timing. Updated for 2026.
Free IVIG Dose Calculator
Use our free IVIG Dose Calculator online. Calculate IVIG dose based on weight and BMI using the Devine formula. Supports both immunoglobulin and RhIG dosing modes. Updated for 2026.
Free Back to Normal Life Calculator
Use our free Back to Normal Life calculator online. Simulate infectious disease spread with the SIR model, adjust social distancing and mask usage to see impact on outbreak dynamics. Updated for 2026.
Free Peptide Dosage Calculator
Use our free peptide dosage calculator online. Calculate syringe pull volume for BPC 157, AOD 9604, and other peptides. Supports weight-based dosing and cycle planning. Updated for 2026.
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