Daily Health Tools — Free Online Health Calculators
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🍽️ Also Visit: Daily Health Kitchen
Free Health Calculators
Built on Real Science
Pregnancy, heart health, cholesterol, keto, stress, running pace, baby growth, and 30+ more free tools — built on WHO, CDC, AHA, and other medical-standard formulas.
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Our Calculators
All 31 Health Tools
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.
Calculate now →
New
Pregnancy Weight Gain Calculator
Track your healthy weight gain range by week using IOM guidelines, with a full trajectory chart and a shareable milestone card.
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New
Baby Height Predictor Calculator
Predict your child's likely adult height from both parents' heights, with a US/UK comparison and a shareable card.
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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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Top Searched
Blood Pressure Checker
Check if your blood pressure reading is normal, elevated, or high based on WHO and AHA guidelines.
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Top Searched
Blood Sugar Checker & Converter
Check your glucose category, estimate A1C, and convert instantly between mg/dL and mmol/L.
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New
Cholesterol Level Checker
Check your Total, LDL, HDL and Triglycerides, plus your 10-year heart disease risk score — with a shareable card.
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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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Top Searched
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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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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Waist-to-Height Ratio
Check your central fat risk score using the Ashwell waist-to-height ratio chart.
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New
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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New
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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New
One Rep Max Calculator
Estimate your 1RM using 4 proven strength formulas, plus a full percentage-based training table.
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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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Macro Calculator
Get your exact daily protein, carbs, and fat targets based on your goal.
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New
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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New
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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Sleep Calculator
Discover the best bedtime or wake-up time based on 90-minute sleep cycles.
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New
Stress Level Calculator
Check your stress score with a 10-question assessment, plus a built-in guided breathing exercise.
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New
Burnout Test Score Calculator
Check your burnout score across work exhaustion, cynicism, and efficacy, with practical next steps.
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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 →
Coming Soon
Intermittent Fasting Timer
Track your fasting window and eating periods for 16:8, 18:6, and other IF protocols.
Coming soon
Coming Soon
Vitamin D Calculator
Estimate your daily Vitamin D needs based on sun exposure, skin tone, and location.
Coming soon
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Why Daily Health Tools
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, IOM, and peer-reviewed medical research.
100% Private
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.
Popular Searches
What People Are Looking For
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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