Free Health Calculators
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Pregnancy, heart health, metabolic health, nutrition, fitness, dental, skin, and baby care — 100+ free tools built on WHO, CDC, AHA, NHS, NIH, and other medical-standard formulas.
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Our Calculators
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All calculators work instantly in your browser. No data is stored or shared.
Popular
Pregnancy Calculator
Find your due date, current week, and trimester instantly from your last period date.
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Pregnancy Weight Gain Calculator
Track your healthy weight gain range by week using IOM guidelines, with a shareable milestone card.
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New
Conception Date Calculator
Estimate your likely conception date based on due date, last period, or ultrasound date.
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Baby Height Predictor Calculator
Predict your child's likely adult height from both parents' heights, with a US/UK comparison.
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Breast Milk Storage Calculator
Know exactly when your pumped or thawed breast milk expires, based on CDC guidelines, with a printable PDF fridge guide.
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New
Baby Formula Intake Calculator
Find how much formula your baby needs per feeding and per day based on age and weight.
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Child BMI Percentile Calculator
Check your child's BMI percentile against CDC growth charts for ages 2-19.
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Child Growth Spurt Predictor
Find out which growth spurt stage your child is likely in, with typical growth velocity by age.
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Period Calculator
Predict your next period date, ovulation window, and fertile days based on your cycle history.
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Ovulation Calculator
Pinpoint your most fertile days and ovulation date to help plan or prevent pregnancy.
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Baby Weight Percentile
Check if your baby is on track using CDC growth chart percentiles by age and gender.
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Blood Pressure Checker
Check if your blood pressure reading is normal, elevated, or high based on WHO and AHA guidelines.
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Blood Sugar Checker & Converter
Check your glucose category, estimate A1C, and convert instantly between mg/dL and mmol/L.
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Cholesterol Level Checker
Check your Total, LDL, HDL and Triglycerides, plus your 10-year heart disease risk score.
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Framingham vs QRISK3 Comparison
Calculate your Framingham heart risk and see how it compares to the UK's QRISK3 model.
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Pulse Pressure Calculator
Calculate your pulse pressure from your blood pressure reading and understand what it means for your heart.
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Mean Arterial Pressure (MAP) Calculator
Calculate your MAP from systolic and diastolic readings, a key clinical perfusion indicator.
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Diabetes Risk Score Calculator
Check your risk of developing type 2 diabetes using a validated risk-factor screening score.
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Heart Rate Calculator
Find your fat-burning, cardio, and peak heart rate zones by age for smarter workouts.
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Recovery Heart Rate Calculator
Check how quickly your heart rate drops after exercise — a strong fitness and health indicator.
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HOMA-IR Insulin Resistance Calculator
Calculate your insulin resistance score from fasting glucose and insulin, with QUICKI cross-reference.
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eGFR Kidney Function Calculator
Estimate your kidney function using the CKD-EPI 2021 race-free equation from your creatinine level.
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New
Corrected Calcium Calculator
Adjust total calcium for albumin using the Payne formula to check for hypo/hypercalcemia.
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Anion Gap Calculator
Calculate your anion gap from sodium, chloride, and bicarbonate lab values.
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Biological Age Calculator
Estimate your biological age from lifestyle factors, or use the advanced PhenoAge blood biomarker formula.
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Fitness Age Calculator
Find out if your body is fitter or older than your actual age based on cardio fitness markers.
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Blood Type Compatibility Calculator
Check blood type compatibility for donation, transfusion, or predicting a baby's possible blood type.
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Corrected Sodium, Deficiency & Intake
Correct serum sodium for hyperglycemia using both Katz and Hillier formulas side-by-side.
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BMI Calculator
Calculate your Body Mass Index and healthy weight range using WHO standards.
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Ideal Weight Calculator
Find your ideal weight using 4 medical formulas (Devine, Robinson, Miller, Hamwi) plus healthy BMI range.
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New
Frame Size Calculator (Wrist Method)
Find out if you have a small, medium, or large body frame using your wrist circumference.
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Weight Loss / Gain Calculator
Get your exact calorie deficit or surplus, weekly timeline, and macro split for your goal.
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Body Fat Calculator
Calculate your body fat percentage and lean mass to set realistic fitness goals.
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VO2 Max Calculator
Estimate your cardiovascular fitness 4 ways, with your fitness age and ACSM category.
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Waist-to-Height Ratio
Check your central fat risk score using the Ashwell waist-to-height ratio chart.
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Waist-to-Hip Ratio Calculator
Find your WHR and body shape classification (apple vs pear) and what it means for your health.
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Body Shape Calculator
Discover your body shape (hourglass, pear, apple, rectangle) for both health and fashion insights.
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Steps to Calories
Convert your daily step count into calories burned based on your weight and pace.
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Calorie Burned Calculator
See exactly how many calories you burned in 25+ activities using verified MET values.
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Jump Rope Calorie Calculator
Find exactly how many calories you burn jumping rope by weight, time, and pace.
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Running Pace Calculator
Find your pace, time, or distance instantly, plus a race time predictor for 5K, 10K, half and full marathon.
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One Rep Max Calculator
Estimate your 1RM using 4 proven strength formulas, plus a full percentage-based training table.
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New
Wilks Score Calculator
Compare your powerlifting total fairly across bodyweights using the 2020 Wilks formula.
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DOTS Score Calculator
Compare your powerlifting total fairly across bodyweights using the modern DOTS formula, with a Wilks comparison.
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New
Strength Standards Calculator
See how your squat, bench, deadlift, or overhead press compares to lifters of your bodyweight, Beginner to Elite.
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New
Hair Growth Rate Calculator
Find out exactly how long it will take to reach your goal hair length, with a personalized timeline.
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Calorie Calculator
Get your daily calorie needs, BMR, TDEE, and macro split based on your activity level.
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Sugar Intake Calculator
See your daily added sugar limit compared across AHA, WHO, and NHS guidelines, with a PDF report.
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Fiber Intake Calculator
Find your daily fiber target and see how your current intake compares to recommendations.
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Sodium Intake Calculator
Check your daily sodium limit against AHA and NHS guidelines to support healthy blood pressure.
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New
Potassium Calculator
Find your daily potassium target or check your serum potassium lab result, with CKD-aware guidance.
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New
Daily Vitamin Intake Calculator
Get your personalized daily RDA for all 13 essential vitamins at once, by age, gender, and life stage.
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Vitamin C Deficiency Calculator
Find your daily Vitamin C target and scurvy risk factors, with a US vs UK guideline comparison.
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Magnesium Intake & Deficiency Calculator
Find your daily magnesium target and safe upper limit, plus an elemental magnesium supplement converter.
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New
Zinc Deficiency & Intake Calculator
Find your daily zinc target, vegetarian-adjusted needs, and the zinc-copper safety interaction.
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New
Calcium + Vitamin D Deficiency Calculator
Get both bone-health nutrient targets together, and understand why they work as a team.
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Calcium Intake Calculator
Find your daily calcium target by age and life stage to support bone health.
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Iron Intake Calculator
Find your daily iron target by age, gender, and diet type, especially useful for vegetarians.
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Omega-3 Intake Calculator
Find your daily EPA/DHA/ALA targets, plus an advanced Omega-3 Index blood test estimator.
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Vitamin D Calculator
Estimate your daily Vitamin D needs based on sun exposure, skin tone, and location.
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Vitamin A Calculator
Find your daily Vitamin A target and safe upper limit, with pregnancy-safe guidance.
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Vitamin E Calculator
Find your daily target and safe upper limit, plus a natural-vs-synthetic mg/IU converter.
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Vitamin K Deficiency Calculator
Check your Vitamin K intake and deficiency risk factors for healthy blood clotting and bones.
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Vitamin B Complex Calculator
Find your daily targets for B12, folate, B6, and other B vitamins by age and life stage.
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Macro Calculator
Get your exact daily protein, carbs, and fat targets based on your goal.
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Keto Macro Calculator
Get personalized fat, protein and net carb targets for the ketogenic diet, with a full research guide.
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Protein Intake Calculator
Find your ideal daily protein intake for muscle building, fat loss, or general health.
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Desi Food Calorie Calculator
Find calories, macros, and health scores in 90+ Pakistani & Indian foods, with a vegetarian filter.
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Water Intake Calculator
Find exactly how much water you should drink daily based on your weight and activity.
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New
Urine Color Hydration Checker
Use the 8-level urine color chart to quickly check your hydration status.
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New
Alcohol Units & Calories Calculator
Convert your drinks into UK units and calories, and compare against weekly guidelines.
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Sleep Calculator
Discover the best bedtime or wake-up time based on 90-minute sleep cycles.
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New
Sleep Debt Calculator
Track your weekly sleep debt against your age-based sleep need, with a trend chart.
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New
Caffeine Half-Life Tracker
Track your caffeine levels through the day and see how much is left by bedtime.
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New
Screen Time Guidelines by Age
Find recommended screen time for your child's age based on AAP, WHO, and UK RCPCH guidance.
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Stress Level Calculator
Check your stress score with a 10-question assessment, plus a built-in guided breathing exercise.
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New
Intermittent Fasting Timer
Track your fasting window live for 16:8, 18:6, 20:4, and OMAD, with a real-time stage tracker.
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Burnout Test Score Calculator
Check your burnout score across work exhaustion, cynicism, and efficacy, with practical next steps.
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New
Life Expectancy Calculator
See how modifiable lifestyle factors relate to life expectancy research — not a prediction.
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Age Calculator
Calculate your exact age in years, months, and days, plus days until your next birthday.
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Sister Site
Desi Food Calculator (Kitchen Edition)
The original Daily Health Kitchen version of our Desi food calorie tool, with recipe pairings.
Visit Daily Health Kitchen →
New
Liver Function (AST/ALT Ratio) Checker
Check your AST/ALT (De Ritis) ratio and what it may suggest about liver health.
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New
Thyroid TSH Reference Range Checker
See if your TSH falls in range for adults or by pregnancy trimester.
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New
Free Testosterone Calculator
Calculate free & bioavailable testosterone using the Vermeulen equation.
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New
Fracture Risk Awareness Checklist
Review the same risk factors used by the FRAX tool, with a link to the official calculator.
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IVF Due Date Calculator
Estimate your due date from your embryo transfer date, Day 3, 5, or 6.
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New
PCOS Symptom Awareness Checklist
Understand the Rotterdam criteria categories used in PCOS evaluation.
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Menopause Stage Estimator
Estimate your stage in the menopause transition using the STRAW+10 framework.
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Hair Loss Stage Checker
Identify your Norwood-Hamilton stage for male pattern baldness.
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New
Digital Eye Strain Timer
Live 20-20-20 rule break reminders to protect your eyes from screen strain.
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New
Noise Exposure & Hearing Damage
Find your safe daily listening time using NIOSH and OSHA standards.
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Blood Donation Eligibility Checker
See if you meet the basic requirements to donate blood.
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Sunscreen SPF & Burn Time Calculator
Estimate safe sun exposure time by skin type and UV index.
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New
ABCDE Mole Check Awareness Tool
Review the ABCDE warning signs dermatologists use to spot early melanoma.
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New
Acne Severity Awareness Tool
Understand where your acne falls on the mild-to-severe spectrum.
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Skin Type Identifier
Find your Fitzpatrick skin type based on how your skin reacts to sun.
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New
Enamel Erosion Risk Calculator
Check your risk factors for acid-related tooth enamel erosion.
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Tooth Brushing Timer
Live 2-minute, 4-quadrant guided brushing timer based on ADA guidelines.
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New
Gum Disease Risk Checklist
Check your warning signs and risk factors for gingivitis and periodontitis.
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New
Bad Breath Cause Checklist
Identify likely causes of your bad breath based on published research.
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New
Altitude Sickness (AMS) Risk Checker
Score your symptoms using the validated Lake Louise Score.
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Built for Real People
No fluff, no fees, no sign-ups. Just fast, accurate health answers.
Science-Based
Every formula is sourced from WHO, CDC, AHA, NHS, NIH, IOM, and peer-reviewed medical research.
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All calculations happen in your browser. We never store your health data.
Mobile Friendly
Works perfectly on any device — phone, tablet, or desktop.
Instant Results
No waiting, no loading screens. Get your answer in under 3 seconds.
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Our Sister Site
Healthy Eating Starts in the Kitchen
Pair your health calculations with science-based nutrition recipes and kitchen tips.
Sister Site
Daily Health Kitchen
Healthy recipes, nutrition tips, and science-based meal plans to complement your health journey.
Visit dailyhealthkitchen.com →
Start With Our Most Popular Tool 🤰
The Pregnancy Calculator is our #1 used tool — find your due date in seconds.
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