Health & Fitness Calculators
Health, fitness and clinical reference calculators built on published, citable formulas, with the source shown next to each result. They help you understand numbers — they do not diagnose or replace a doctor.
All 48 health tools
Grouped by what they do.
Body measurements
8 toolsMeasures of body size and composition.
- BMI Calculator (WHO & Asian Cut-offs) Your BMI on WHO, Asian and Indian scales, with your healthy weight range.
- Ideal Body Weight Calculator Devine, Robinson, Miller and Hamwi side by side, with your healthy BMI weight range.
- Body Fat Calculator (Navy, Skinfold, BMI) Body-fat % four ways, with fat mass, lean mass and the healthy range for your age.
- Child & Teen BMI Percentile Calculator BMI-for-age percentile and weight status for ages 2–19, plotted on a CDC growth chart.
- FFMI Calculator (Fat-Free Mass Index) Fat-free mass index from your body-fat %, compared with adults of your age and sex.
- Waist-to-Hip Ratio Calculator Your waist-to-hip ratio and waist size against WHO and IDF cut-offs.
- Waist-to-Height Ratio & Body Roundness Index Is your waist less than half your height? Plus Body Roundness Index and ABSI.
- Child Adult Height Predictor How tall might your child be? A family target range and a growth-chart projection.
Calories & nutrition
11 toolsEnergy, food and drink.
- BMR Calculator (Mifflin-St Jeor, Harris-Benedict) Your basal metabolic rate from eight published equations, in kcal and kJ.
- Food Nutrition Facts Lookup Calories and 40 nutrients with % Daily Value for 13,500 USDA foods, searched on-device.
- Protein Intake Calculator How much protein you need a day and per meal, from the IOM, ICMR-NIN, ISSN and PROT-AGE.
- TDEE & Daily Calorie Calculator Calories a day to maintain, lose or gain weight — two methods, kcal or kJ.
- Calorie Deficit & Weight Loss Planner Daily calories to reach your goal weight, from the NIH body-weight model.
- Daily Water Intake Calculator Your daily water from EFSA and IOM reference intakes, plus exercise — and a glass counter.
Show all 11 Show fewer Calories & nutrition tools
- Macro Calculator (Protein, Carbs, Fat) Daily and per-meal grams of protein, carbs and fat for your calorie target.
- Recipe Nutrition Calculator Calories and nutrients of a whole recipe per serving and per 100 g, from USDA data.
- Nutrition Facts Label Generator FDA, FSSAI and EU nutrition labels with each regulation’s rounding — SVG, PNG and PDF. Pro tool
- Vitamin & Mineral RDA Calculator Your daily vitamin and mineral needs and upper limits, from NASEM, ICMR-NIN or EFSA.
- Intermittent Fasting Calculator & Timer Your eating window for 16:8, 5:2 and more, plus a fasting timer with history.
Fitness & training
11 toolsTraining, performance and exercise.
- Heart Rate Zone Calculator (Karvonen) Your maximum heart rate and training zones in bpm, by Karvonen or % of max.
- One-Rep Max (1RM) Calculator Your estimated 1RM from a submaximal set, with training loads by percentage and rep max.
- Calories Burned Calculator (MET) Calories for any activity from published METs, and your week against the WHO guideline.
- Running Pace Calculator Pace, time or distance for any run, with splits, track laps and a printable pace band.
- Steps to Km/Miles & Calories Calculator Steps to distance and back, with walking time, calories and what research found on steps.
- Interval Timer Work and rest intervals, rounds and sets, with beeps, voice cues and a big colour display.
Show all 11 Show fewer Fitness & training tools
- Race Time Predictor Equivalent race times from one result, a marathon reality check and five training paces.
- VO2 Max Calculator (Fitness Tests) Your VO₂ max from five field tests, with METs and how it compares for your age and sex.
- Powerlifting Score Calculator (IPF GL, DOTS, Wilks) Compare lifters of any bodyweight with IPF GL points, DOTS, Wilks and Wilks2.
- Barbell Plate Calculator Plates per side for any target, with the plates you actually have.
- HIIT & Tabata Interval Timer Intervals, circuits, EMOM and AMRAP with beeps and voice cues — it works offline.
Pregnancy, periods & baby
7 toolsCycles, pregnancy and the first years.
- Pregnancy Week Calculator & Timeline Weeks pregnant, trimester and every antenatal check — dated for you.
- Period Tracker & Calculator (Private) Track your cycle on your own device — predictions, cycle checks, no account, no upload.
- Ovulation & Fertile Window Calculator Your fertile window, ovulation day and test dates for the next six cycles.
- Pregnancy Due Date Calculator Your estimated due date, how far along you are and the key dates ahead.
- Conception Date Calculator Work back from a due date, birth date, last period or IVF transfer to the conception date.
- Pregnancy Weight Gain Calculator Your pregnancy weight gain against the IOM ranges for your BMI, tracked week by week.
- hCG Doubling Time Calculator Doubling time and 48-hour change from two or more beta-hCG blood results.
Clinical calculators
4 toolsScores and lab values for healthcare professionals.
- Blood Pressure Checker & Log What your blood pressure numbers mean — and a home log your doctor can use.
- HbA1c to Average Glucose Calculator (eAG) Turn an HbA1c result into the average glucose it reflects — and back.
- Blood Sugar Converter (mg/dL ↔ mmol/L) Convert glucose readings and see which range they fall in — test by test.
- eGFR Calculator (CKD-EPI 2021) Your eGFR from a creatinine result, with the KDIGO stage and risk colour.
Mental health & lifestyle
7 toolsMental health screens and lifestyle numbers.
- Sleep Cycle Calculator (Bedtime & Wake-up) Bedtimes and wake-up times that fit whole sleep cycles, plus how much sleep you need.
- Smoking Cost & Pack-Year Calculator Cost, pack-years and screening check — plus a quit tracker, craving diary and pledge card.
- Breathing Exercise Timer (Box, 4-7-8, Coherent) Follow the circle: box, 4-7-8, coherent breathing or a cyclic sigh, with gentle cues.
- Blood Alcohol (BAC) Estimator Estimated BAC now, at its peak and back to zero — never a guide to whether you can drive.
- Life Expectancy Calculator (UN Life Tables) Average years ahead for your age, sex and country, from UN life tables.
- Caffeine Intake & Half-Life Calculator Today’s caffeine against EFSA and FDA guidance, and how much is left at bedtime.
- Alcohol Units & Standard Drinks Calculator UK units, standard drinks, grams and calories for any drink, and a weekly check.
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Choose “Anything” in one of the filters, or look across every category on All tools.
Health tools A–Z
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- Barbell Plate Calculator
- Blood Alcohol (BAC) Estimator
- Blood Pressure Checker & Log
- Blood Sugar Converter (mg/dL ↔ mmol/L)
- BMI Calculator (WHO & Asian Cut-offs)
- BMR Calculator (Mifflin-St Jeor, Harris-Benedict)
- Body Fat Calculator (Navy, Skinfold, BMI)
- Breathing Exercise Timer (Box, 4-7-8, Coherent)
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Collections with health tools
All collections →Good to know
- All 48 tools run in your browser: what you open or paste is not uploaded.
- 47 of 48 keep working without a connection once loaded.
- Food Nutrition Facts Lookup: Downloads the food tables from this site in small pieces as you search; what you type is matched on your device and never sent.
- Life Expectancy Calculator (UN Life Tables): Downloads the UN life tables (about 170 KB) from MySmartCoPilot once; your age, sex and country stay in your browser.
- Results are estimates for planning and learning, not medical or legal advice. Check the method and assumptions on each tool’s page.
Other categories
All tools →- 132 tools Developer Format, validate, encode, decode.
- 40 tools Data CSV, Excel, tables, charts.
- 95 tools Text Count, clean, sort, compare.
- 92 tools Image Compress, resize, convert, crop.
- 55 tools PDF Merge, split, extract, convert.
- 35 tools Audio & Video Convert, trim, compress media.
- 56 tools Design Colours, gradients, CSS.
- 36 tools SEO Meta tags, sitemaps, schema.
- 27 tools Social Media Captions, previews, limits.
- 94 tools Finance Loans, savings, interest, tax.
- 78 tools Business Invoices, quotes, margins.
- 39 tools Legal Templates and legal maths.
- 51 tools Math Calculators and solvers.
- 45 tools Science Physics, chemistry, astronomy.
- 31 tools Engineering Electronics, electrical, mechanical.
- 29 tools Construction Materials, area, home costs.
- 80 tools Education Grades, citations, study.
- 36 tools Network DNS, headers, IPs, subnets.
- 35 tools Security Passwords, encryption, keys.
- 33 tools Converters Every unit, exact factors.
- 75 tools Utility Convert, count down, randomise.