Health & Wellness Calculators
Science-backed tools for sleep, burnout, hydration, and everyday body health — free, instant, and peer-reviewed.
Health and wellness calculators built on peer-reviewed science — not guesswork. Every tool in this category has been checked for accuracy and cites its sources. Use these calculators to understand your body, optimise your sleep, track your hydration, assess burnout risk, and make better daily health decisions. All tools are free, private, and instant.
Popular Health & Wellness Calculators
All Health & Wellness Tools
10 carefully crafted calculators and tools to help you with health & wellness
BMI Calculator
Calculate your Body Mass Index (BMI) from your height and weight in metric or imperial units, see your WHO weight category, and find the healthy weight range for your height.
BMR Calculator
Calculate your basal metabolic rate (BMR) — the calories your body burns at complete rest — using the Mifflin-St Jeor and Harris-Benedict equations, with daily calorie estimates for different activity levels.
Burnout Risk Calculator
Answer 10 science-backed questions about your work, sleep, and stress to get your burnout risk score and a personalised recovery plan.
Calorie Deficit Calculator
Calculate your calorie deficit in three steps. Get your TDEE, daily calorie target, macro breakdown, and a week-by-week weight-loss projection that adjusts for the drop in metabolism as you lose weight.
Daily Hydration Schedule
Get a personalised hourly drinking schedule based on your weight, wake time, and activity level. Stop guessing about hydration. Get a science-backed hourly plan for today.
Ideal Weight Calculator
Estimate your ideal body weight using the Robinson, Miller, Devine, and Hamwi formulas, alongside the healthy weight range from BMI. Based on your height and sex.
Ovulation Calculator
Estimate your ovulation day and fertile window from your last period and cycle length. Shows your most fertile days and when your next period is expected.
Pregnancy Due Date Calculator
Estimate your pregnancy due date from your last menstrual period or conception date, with your current gestational age in weeks and days and your trimester. Uses Naegele's rule.
Sleep Calculator
Calculate the best time to sleep or wake up based on 90-minute sleep cycles, an exact custom duration, or your own age group. Never wake up groggy again.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and see your WHO health-risk category. A simple screening measure of how body fat is distributed, which matters more than weight alone.
Your health decisions deserve better than guesswork. Every calculator in this category is built on peer-reviewed research and reviewed before publication. Whether you need to find your optimal bedtime based on sleep cycle science, assess your burnout risk using the Maslach Burnout Inventory framework, or build a personalised hourly hydration schedule — you will find a free, accurate tool here. No signup. No personal data stored. All calculations run entirely in your browser.
Why Use CalcPool Health Tools?
Peer-reviewed methodology
Every tool cites the scientific studies behind its calculations. We link directly to the source research so you can verify the methodology yourself.
Personalised to you
These are not population-average tools. Every result is calculated from your specific inputs — your weight, your wake time, your work situation.
Not medical advice
Our tools provide scientifically grounded information to support your decisions. They do not replace a doctor, therapist, or registered dietitian. Every tool includes a clear disclaimer about this.
Frequently Asked Questions
Common questions about health & wellness calculators and tools
Q.Are these health calculators scientifically accurate?
All CalcPool health tools are built on peer-reviewed research. The Sleep Calculator uses established 90-minute sleep cycle science (Walker, 2017). The Burnout Risk Calculator uses the Maslach Burnout Inventory (MBI) framework and WHO ICD-11 classification. Each tool page lists its sources.
Q.Do you store my health data?
No. All calculations run entirely in your browser. We never receive, store, or transmit your personal health inputs. Your data stays on your device.
Q.Can I use these tools if I have a medical condition?
Our tools provide general health information for healthy adults. If you have a medical condition, please consult a qualified healthcare professional before making health decisions based on any calculator output.
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