Health Calculators

Browse 114 free health tools. All tools are free, instant, and require no signup.

Monitor your health with BMI, BMR, body fat, calorie, and fitness calculators. Track pregnancy due dates, ideal weight, heart rate zones, and nutritional needs for better health decisions.

All Health Tools

• A1C to Blood Sugar Converter - Convert A1C percentage to estimated average blood glucose (eAG) in mg/dL or mmol/L. Essential tool for diabetes management.
• Adjusted Body Weight Calculator - Calculate ideal and adjusted body weight for dosing decisions using height, sex, and a configurable factor.
• AI Energy Penalty Forecaster - AI-powered tool that input late-night caffeine or alcohol intake and timing. Calculates the exact quantitative impact on tomorrow's deep sleep and baseline energy levels.
• Air Force PT Test Calculator - Estimate Air Force PT scores from run time, push-ups, and sit-ups by age and sex.
• Alcohol Unit Calculator - Calculate alcohol units consumed from drink type, volume, and ABV%. Track against weekly guidelines.
• Army Body Fat Calculator - Estimate body fat percentage using the U.S. Army/Navy tape measure method (Neck, Waist, and Hip).
• Army Fitness Test Calculator - Estimate Army Combat Fitness Test (ACFT) scores across all six events.
• Baby Growth Percentile Calculator - Approximate baby growth percentiles for weight, length, and head circumference (0–24 months).
• BAC Calculator - Estimate your Blood Alcohol Content (BAC) based on consumption, body weight, and time elapsed.
• Bench Press Calculator - Estimate bench press 1RM and training loads using Epley and Brzycki formulas.
• Blood Alcohol Content (BAC) Calculator - Estimate blood alcohol concentration based on drinks consumed, body weight, sex, and time elapsed.
• BMI Calculator - Calculate Body Mass Index from height and weight with health category classification
• BMI Calculator for Kids - Calculate Body Mass Index for children (2-12 years) using growth chart principles for age-appropriate weight tracking.
• BMI Calculator for Men - Check your body mass index with standard weight classifications tailored for adult men.
• BMI Calculator for Teens - Growth-adjusted BMI calculator specifically designed for teenagers (13-19) to track development during puberty.
• BMI Calculator for Women - Check your body mass index with standard weight classifications tailored for adult women.
• BMI Calculator Pro - Instant Body Mass Index check with standard healthy weight ranges.
• BMI in Pregnancy - IOM-standardized weight gain recommendations based on pre-pregnancy BMI for a healthy pregnancy.
• BMI Percentile Calculator - Compare your BMI against population averages to see where you stand relative to others (simulated population data).
• BMI Weight Loss Calculator - Estimate calories and time needed to reach a 'Normal' target BMI from your current weight.
• BMR Calculator - Calculate your Basal Metabolic Rate—the calories your body needs to function at rest—using the accurate Mifflin-St Jeor formula.
• Body Fat Calculator - Calculate body fat percentage and lean mass using US Navy method
• Body Fat Percentage - Estimate your body fat percentage using the US Navy tape measure method for a clear view of your body composition.
• Body Shape Calculator - Determine your body shape category based on bust, waist, and hip measurements.
• Body Surface Area (BSA) - Calculate your Body Surface Area using the Mosteller formula for precise health and clinical metrics.
• Body Surface Area Calculator - Calculate body surface area (BSA) using height and weight with standard medical formulas.
• Body Type Calculator - Determine your body type (ectomorph, mesomorph, endomorph) based on measurements and physical characteristics
• Braces Cost Calculator - Estimate orthodontic braces costs by type (metal, ceramic, lingual), treatment duration, and location. Shows monthly payment options, insurance coverage, and comparison to alternatives.
• Breast Augmentation Cost Calculator - Estimate breast augmentation costs by implant type (silicone vs saline), surgeon experience, and location. Shows total cost breakdown including surgery, anesthesia, and follow-up. Uses AI for current pricing.
• Breathing Exercise - Guided breathing exercises for relaxation with animated visual guide and multiple techniques
• Calorie Deficit Calculator - Calculate your daily calorie needs and optimal deficit for safe, sustainable weight loss.
• Calorie Density Calculator - Calculate the calorie density of foods by dividing total calories by weight or volume.
• Calorie Intake Calculator - Calculate daily calorie needs to maintain, lose, or gain weight
• Calories Burned - Estimate energy expenditure during various activities using Metabolic Equivalent of Task (MET) values.
• Calories Burned Biking Calculator - Calculate calories burned while biking based on weight, intensity, and duration
• Calories Burned Calculator - Calculate calories burned for any physical activity based on weight, activity type, and duration
• Calories Burned Hiking Calculator - Calculate calories burned while hiking based on weight, terrain difficulty, backpack weight, and duration
• Calories Burned Jumping Rope Calculator - Calculate calories burned while jumping rope based on weight, intensity, and duration
• Calories Burned Swimming Calculator - Calculate calories burned while swimming based on weight, swim stroke, intensity, and duration
• Calories Burned Walking Calculator - Calculate calories burned while walking based on weight, speed, incline, and duration
• Calories Burned Weight Lifting Calculator - Calculate calories burned during weight lifting based on body weight, workout intensity, and duration
• Carb Calculator - Calculate recommended daily carbohydrate intake based on calorie needs and dietary goals.
• Child & Teen BMI Calculator - Calculate BMI percentile for children and teens based on age, sex, height, and weight.
• Child Height Percentile Calculator - Calculate a child's height percentile based on age, sex, and height.
• Child Weight Percentile Calculator - Calculate a child's weight percentile based on age, sex, and weight.
• Conception Date Calculator - Estimate likely conception dates based on due date or last period.
• Daily Calorie Needs - Calculate your Total Daily Energy Expenditure (TDEE) to understand exactly how many calories you burn per day.
• Daily Water Intake Calculator - Calculate your recommended daily water intake based on weight, activity level, and climate.
• Dental Veneers Cost Calculator - Estimate dental veneer costs by material (porcelain vs composite), number of teeth, and location. Shows per-tooth pricing, full-smile packages, and longevity comparison.
• Dog Food Calculator - Calculate daily feeding amounts by breed, weight, age, activity level, and food type (dry/wet/raw). Show calorie needs and portion sizes.
• Due Date Calculator - Calculate your baby's due date based on last menstrual period, conception date, or ultrasound date
• Exercise Equivalent Calculator - Convert exercise to equivalent activities and see what foods your workout burns off
• Fertility Treatment Cost Estimator - Estimate IVF, IUI, egg freezing, and other fertility treatment costs including medications, cycles, and insurance coverage.
• German Shepherd Feeding Calculator - Calculate how much to feed your German Shepherd by age, weight, and activity level. Shows daily calories, cups of food, and feeding schedule for puppy, adult, and senior German Shepherd dogs.
• GFR Calculator - Calculate estimated Glomerular Filtration Rate (eGFR) to assess kidney function using CKD-EPI equation
• Hair Transplant Cost Calculator - Estimate hair transplant costs by procedure type (FUE vs FUT), graft count, and location. Shows price ranges and financing options.
• Health Calculator - Calculate your Body Mass Index (BMI) and Basal Metabolic Rate (BMR) with Metric and Imperial support.
• Healthy Weight Calculator - Calculate your healthy weight range based on height, age, gender, and body frame size using multiple scientific methods
• Height Calculator - Convert height instantly between feet/inches and centimeters
• Height Comparison Chart - Enter heights in feet/inches or centimeters and see them ordered with differences highlighted.
• Ideal Body Weight Calculator - Find your ideal weight using proven medical formulas
• Ideal Weight Calculator - Determine your ideal healthy weight range based on established medical formulas like Devine and Robinson.
• Intermittent Fasting Window Calculator - Calculate your eating and fasting windows for popular IF schedules like 16:8, 18:6, and 20:4
• Invisalign Cost Calculator - Estimate Invisalign clear aligner costs by case complexity, treatment duration, and location. Compare to traditional braces and see insurance coverage options.
• IVF Cost Calculator - Estimate IVF treatment costs by cycle count, medication protocol, and location. Shows per-cycle costs, add-on procedures (PGT, ICSI, FET), and cumulative cost over multiple rounds.
• Keto Calculator - Calculate daily calorie and macronutrient targets for ketogenic diet
• Labrador Retriever Feeding Calculator - Calculate how much to feed your Labrador Retriever by age, weight, and activity level. Shows daily calories, cups of food, and feeding schedule for puppy, adult, and senior Labrador Retriever dogs.
• LASIK Surgery Cost Calculator - Estimate LASIK and PRK eye surgery costs by procedure type, technology, and city or region.
• Lean Body Mass - Calculate your lean mass vs. fat mass to better understand your physical health and fitness goals.
• Lifting Strength Calculator - Estimate one-rep max and strength levels for common lifts
• Liposuction Cost Calculator - Estimate liposuction costs by treatment area, technique, and location. Shows per-area pricing, combination discounts, and recovery costs.
• Macro Calculator - Calculate your optimal daily protein, carbohydrate, and fat intake for your fitness goals.
• Maintenance Calorie Calculator - Calculate the daily calories needed to maintain your current weight based on your age, sex, height, weight, and activity level.
• Medicare Part D Plan Comparison - Compare Medicare Part D prescription drug plans to find the lowest total annual cost based on your medications
• Medication Dose Calculator - Calculate weight-based medication dosages. Enter the prescribed dose per kg and patient weight to find the correct dose.
• Mifflin St. Jeor Calculator - Calculate basal metabolic rate using the Mifflin-St Jeor equation
• Navy Body Fat Calculator - Calculate body fat percentage using U.S. Navy method
• Navy PRT Calculator - Calculate Navy Physical Readiness Test scores
• Net Carb Calculator - Calculate net carbs by subtracting fiber and sugar alcohols
• One-Rep Max Calculator - Calculate your estimated one-rep max from any weight and rep count
• Overweight & Ponderal Index - Determine weight category using both BMI and Ponderal Index (kg/m³) for a more accurate mass-to-height ratio.
• Ovulation Calculator - Estimate your most fertile window based on your last menstrual period and cycle length.
• Pace and Distance Calculator - Calculate pace, distance, or time for running and walking
• Period Calculator - Track and predict your menstrual cycle with period start dates, ovulation window, and fertile days
• Pet Longevity & Life-Stage Wellness Planner - Predicts health milestones and expected maintenance costs for dog or cat breeds as they age
• Pregnancy Calculator - Calculate pregnancy milestones, trimester dates, and track weeks based on last menstrual period or due date
• Pregnancy Conception Calculator - Calculate the estimated conception date based on due date or last menstrual period with cycle length adjustment
• Pregnancy Due Date - Estimate your baby's due date based on the date of your last period.
• Pregnancy Due Date Calculator - Calculate your expected due date based on your last menstrual period using Naegele's Rule.
• Pregnancy Weight Gain Calculator - Calculate recommended pregnancy weight gain based on pre-pregnancy BMI and track healthy targets by trimester
• Prescription Drug Cost Comparison - Compare branded vs generic drug costs across pharmacies. Show savings from generics, mail-order, and discount programs like GoodRx.
• Protein Calculator - Calculate daily protein requirements based on body weight, activity level, and fitness goals
• Push-Ups Calorie Calculator - Calculate calories burned doing push-ups based on reps and body weight
• Resting Heart Rate Tracker - Assess your cardiovascular fitness by measuring your resting BPM and comparing it against health benchmarks.
• Rhinoplasty Cost Calculator - Estimate nose job costs by procedure type (cosmetic vs functional), complexity, and location. Shows surgeon fees, anesthesia, facility costs, and recovery timeline. Uses AI for current pricing.
• RMR Calculator - Calculate your Resting Metabolic Rate and daily calorie needs
• Sleep Calculator - Find your ideal bedtime or wake time based on 90-minute sleep cycles for better rest.
• Sleep Debt Calculator - Calculate your cumulative sleep deficit over the last week to better manage your recovery and alertness.
• Social Battery Projection Tool - Plan your day by tracking energy drain and recharge from social activities.
• Social Battery Tracker - Visualize your energy levels across the week by tracking social events and their intensity
• Social Recoup Estimator - Calculate how long it takes to recoup social time investments
• Squat Max Calculator - Calculate your estimated squat one-rep max and strength level
• Step Goal Calculator - Calculate exactly how many steps you need to take each day to hit your target calorie burn or distance goals.
• Target Heart Rate Calculator - Calculate target heart rate zones for exercise based on age and resting heart rate
• TDEE Calculator - Calculate total daily energy expenditure and BMR instantly
• USMC PFT/CFT Calculator - Calculate U.S. Marine Corps Physical Fitness Test and Combat Fitness Test scores
• Waist-to-Height Ratio - Assess your risk of obesity-related diseases. A simple ratio of waist size to height is a powerful indicator of metabolic health.
• Waist-to-Hip Ratio - Assess your distribution of body fat and identify potential health risks associated with abdominal obesity.
• Water Intake Calculator - Determine your daily optimal hydration goals based on weight, activity, and climate conditions.
• Weight Gain Calculator - Calculate daily calorie intake needed to gain weight based on your goals and activity level
• Weight Loss Calculator - Estimate the daily calorie deficit needed to lose weight. Shows required caloric intake and expected weekly weight loss.
• Weight Loss Percentage Calculator - Calculate the percentage of body weight lost based on starting and current weight
• Weight Watcher Points Calculator - Calculate SmartPoints and PointsPlus values for foods based on calories, saturated fat, sugar, and protein content
• Zone 2 Heart Rate Calculator - Calculate your Zone 2 heart rate range for optimal fat-burning and endurance training