Health
Free health calculators: BMI, calories, body fat, heart rate, and more.
Allergy Season Calculator
Check expected pollen levels by region and month. Get prevention tips and allergy management suggestions.
Blood Type Compatibility Calculator
Find out who you can donate blood to and receive blood from based on your blood type. Includes Rh factor compatibility.
BMI Goal Weight Calculator
Find your target weight range for a healthy BMI. Enter your height and desired BMI to see the weight you should aim for.
Calcium Intake Calculator
Find your recommended daily calcium intake based on age and gender. Includes food sources to help you meet your calcium needs.
Daily Calorie Need
Quick estimate of your daily calorie needs based on age, gender, and activity level.
Glasses Prescription Converter
Convert glasses prescription between plus and minus cylinder notation.
Intermittent Fasting Timer Calculator
Calculate your eating window based on your last meal time and fasting protocol. Supports 16:8, 18:6, 20:4, and OMAD.
Menstrual Cycle / Period Tracker Calculator
Estimate your next period date, PMS window, and fertile window based on your last period and cycle length. A simple planning tool.
Pace Converter Calculator
Convert running pace between min/km, min/mile, km/h, and mph. Enter any pace format and get all conversions instantly.
Posture Break Reminder Calculator
Calculate your optimal break schedule based on work hours and desk type. Get exercise suggestions for each break.
Screen Viewing Distance Calculator
Find the ideal viewing distance for your TV, monitor, or phone based on screen size and type. Reduce eye strain with proper positioning.
Shoe Replacement Calculator
Estimate when your running or walking shoes need replacing based on your weekly mileage and shoe type.
Sleep Debt Calculator
Calculate your accumulated sleep debt based on hours slept vs recommended. Get a recovery plan to catch up.
Standing Desk Timer Calculator
Plan your ideal sit-stand schedule at work. Enter your hours and preferred ratio to get a standing desk routine that reduces fatigue.
Step Length Calculator
Estimate your step and stride length based on height and gender. Useful for pedometer calibration and distance tracking.
Steps to Miles/Km
Convert your step count to distance walked in miles or kilometers.
Stretching Routine Calculator
Generate a stretching plan based on your target body areas and available time. Get hold times and stretch counts.
Supplement Cost per Day Calculator
Calculate the true daily and monthly cost of your supplements. Compare brands and find the best value per serving.
TDEE by Activity Calculator
Calculate your Total Daily Energy Expenditure separately for rest days and training days. Tailored calorie targets for each.
Vitamin C Daily Need Calculator
Find your recommended daily Vitamin C intake based on age, gender, and smoking status. Backed by NIH guidelines.
Water Bottle Refills Calculator
Calculate how many times you need to refill your water bottle each day to meet your hydration goal. Works with any bottle size.
20-20-20 Rule Timer Calculator
Calculate your break schedule using the 20-20-20 rule to reduce eye strain from screen time.
A1C to Blood Sugar Calculator
Convert your A1C percentage to estimated average glucose (eAG) in mg/dL and mmol/L. Understand what your A1C results mean.
Adjusted Body Weight Calculator
Calculate adjusted body weight (ABW) for drug dosing in obese patients. Used in anesthesia and pharmacology for accurate medication calculations.
Alcohol Units Calculator
Calculate alcohol units in your drinks and compare against recommended weekly limits. Track your consumption easily.
Antibiotic Schedule Calculator
Generate a complete antibiotic dosing schedule with times and end date based on doses per day, start time, and course length.
BAC (Blood Alcohol Content) Calculator
Estimate your blood alcohol content based on weight, gender, number of drinks, and time spent drinking. Always drink responsibly.
Blood Pressure Checker
Enter your systolic and diastolic blood pressure readings to find out your category: normal, elevated, high stage 1, stage 2, or hypertensive crisis.
Blood Sugar Converter
Convert blood sugar levels between mg/dL and mmol/L. Includes reference ranges for fasting, post-meal, and A1C equivalents.
BMI Calculator
Calculate your Body Mass Index (BMI). Supports both metric (kg/cm) and imperial (lbs/inches) units.
Body Fat Calculator (US Navy Method)
Estimate your body fat percentage using the US Navy method. Calculates fat mass, lean mass, and body fat category.
Body Frame Size Calculator
Determine your body frame size (small, medium, or large) using wrist circumference and height. Helps interpret ideal weight ranges.
Body Surface Area (BSA) Calculator
Calculate Body Surface Area using the Mosteller formula. Supports metric and imperial units. Used for medication dosing and clinical assessments.
Breast Milk Storage Duration Calculator
Find safe storage times for expressed breast milk at room temperature, in the refrigerator, or in the freezer based on CDC guidelines.
Caffeine Half-Life Calculator
Calculate how much caffeine remains in your body after a given time and get a bedtime recommendation.
Calorie Calculator (TDEE)
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation. Find calories to maintain, lose, or gain weight.
Calorie Deficit Calculator
Calculate the daily calorie deficit needed to reach your target weight in your desired timeline. Safe and sustainable weight loss planning.
Calories Burned Walking Calculator
Calculate calories burned while walking based on your weight, distance, and speed. Accurate MET-based calculation.
Carb Counter Calculator
Calculate total carbs, fiber, and net carbs for common foods by serving size. Useful for low-carb and keto diets.
Cholesterol Ratio Calculator
Calculate your cholesterol ratios including Total/HDL, LDL/HDL, and triglyceride ratios for cardiovascular risk assessment.
Corrected Calcium Calculator
Calculate corrected calcium for low albumin levels. Enter total serum calcium and albumin to get the adjusted calcium value.
Creatinine Clearance Calculator (Cockcroft-Gault)
Calculate creatinine clearance using the Cockcroft-Gault equation. Estimates kidney function for medication dosing. Supports metric and imperial units.
Daily Fiber Intake Calculator
Find your recommended daily fiber intake based on age and gender, and calculate your fiber deficit.
Daily Iron Intake Calculator
Find your recommended daily iron intake based on age, gender, and diet type with food source suggestions.
Daily Steps to Distance Calculator
Convert your daily step count to distance walked in kilometers or miles based on your height and stride length.
Daily Water Intake Calculator
Calculate how much water you should drink daily based on your weight, activity level, and climate. Shows results in liters and glasses.
GFR Calculator (Kidney Function)
Estimate glomerular filtration rate (eGFR) using the CKD-EPI equation. Enter age, serum creatinine, and sex to assess kidney function stage.
Healthy Weight Range Calculator
Find your healthy weight range based on height using BMI guidelines (18.5–24.9). Supports imperial and metric units.
Hearing Frequency by Age Calculator
Estimate your expected maximum hearing frequency based on age. Understand age-related hearing loss (presbycusis).
Hydration Check Calculator
Check your hydration status based on urine color, activity level, and temperature, with personalized recommendations.
Ideal Weight Calculator
Calculate your ideal body weight range using the Devine, Robinson, and Miller formulas. Supports both metric and imperial units.
Infant Growth Percentile Tracker
Estimate your baby"s growth percentile based on birth weight, current weight, and age. Uses simplified WHO growth chart data.
IV Drip Rate Calculator
Calculate intravenous drip rate in drops per minute. Supports different drop factors for macro and micro drip sets.
IVF Due Date Calculator
Estimate your due date after IVF embryo transfer. Supports both Day 3 and Day 5 (blastocyst) transfers.
Lean Body Mass Calculator
Calculate your lean body mass using the Boer formula. Supports metric and imperial units for both men and women.
Macro Calculator
Calculate your daily macronutrient targets for protein, carbs, and fat based on your TDEE, goal, and preferred diet type.
Medical Unit Converter
Convert between mg/dL and mmol/L for blood glucose, cholesterol, and other common lab values. Essential for understanding international medical reports.
Medication Dosage by Weight Calculator
Calculate the correct medication dosage based on body weight. Supports mg/kg dosing for adults and children.
Medication Reminder Calculator
Calculate an evenly spaced medication schedule based on doses per day and first dose time. Never miss a dose again.
Metabolic Age Estimator
Estimate your metabolic age based on your basal metabolic rate, actual age, and activity level.
Ovulation Calculator
Estimate your fertile window, ovulation day, and next period based on your last period date and cycle length.
Pediatric Dose Calculator
Calculate pediatric medication doses using Clark"s Rule and Young"s Rule. Enter adult dose and child"s weight or age for accurate dosing.
Pre-Pregnancy BMI & Weight Gain Calculator
Calculate your pre-pregnancy BMI and see the recommended weight gain range during pregnancy based on IOM guidelines.
Pregnancy Due Date Calculator
Estimate your pregnancy due date based on your last menstrual period or conception date. See your current week and trimester.
Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on your pre-pregnancy BMI and current week of pregnancy.
Protein Need Calculator
Calculate your daily protein requirements based on your weight, activity level, and fitness goals.
Running Heart Rate Zones Calculator
Calculate your 5 training heart rate zones using the Karvonen formula. Enter max and resting heart rate for personalized zones.
Senior BMI Calculator
Calculate BMI for adults 65+ with age-adjusted healthy ranges. Standard BMI charts don't apply to seniors — this calculator uses the recommended 22-27 range.
Sick Day Fluid Intake Calculator
Calculate how much fluid you need when sick based on your weight and fever status. Stay properly hydrated during illness.
Sleep Need Calculator
Find out how much sleep you need based on your age group. Get recommended sleep hours from the National Sleep Foundation.
Smoking Cost Calculator
Calculate how much you spend on cigarettes daily, monthly, and yearly. See your potential savings over 10 years if you quit.
Sodium Intake Tracker
Track your daily sodium intake and compare it to the recommended 2,300mg limit. See your health tier and get practical tips to reduce sodium.
SpO2 Oxygen Saturation Guide
Enter your pulse oximeter SpO2 reading to understand if it's normal, concerning, or requires emergency action.
Steps Goal Calculator
Calculate the daily step increase needed to reach your target steps within a set number of days. Track your walking progress.
Sunscreen Amount Calculator
Calculate how much sunscreen you need per application based on body area and SPF. Includes reapplication schedule.
Target Heart Rate Calculator
Calculate your maximum heart rate and target heart rate zones for fat burn, cardio, and peak training. Uses the Karvonen method when resting heart rate is provided.
Teen BMI Percentile Calculator
Calculate BMI percentile for teenagers aged 13-19. Uses CDC growth charts to determine healthy weight status by age and gender.
Time to Sober Calculator
Estimate how many hours until your blood alcohol content (BAC) reaches 0.00 based on your current estimated BAC level.
Vision Prescription Converter
Convert your spectacle (glasses) prescription to contact lens prescription. Accounts for vertex distance adjustment.
Vitamin D Calculator
Estimate your recommended daily Vitamin D intake (IU) based on your weight, skin tone, latitude, and time of year.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and assess health risk. Supports inches and centimeters.
Walking Speed Estimator
Calculate your walking speed from distance and time. Get a fitness assessment based on your pace in mph or km/h.