GALAXY OF TOOLS

HEALTH SECTOR · 87 TOOLS

Free Health & Fitness Calculators

BMI, calories, body fat, pregnancy and sleep calculators. 87 free tools, no sign-up.

BMI CalculatorFind your body mass index in cm/kg or ft/lb, with WHO or Asian categories and your healthy weight range.Health & FitnessCalorie CalculatorMaintenance calories (TDEE), a calorie deficit or surplus of your choice, and weeks to your goal weight.Health & FitnessPregnancy Due Date CalculatorDue date from your last period, conception, IVF, scan (CRL) or due date — with week and month views.Health & FitnessCalories Burned CalculatorEstimate calories burned walking, running, cycling, swimming, yoga, sports and chores from your weight and time.Health & FitnessWeight Loss CalculatorWhen will you reach your goal weight, or what daily calories get you there by a date? With safe-rate checks.Health & FitnessFood Calorie CalculatorLook up calories, protein, carbs and fat for 300 foods by grams, ounces or cups, and keep a free day log.Health & FitnessSleep CalculatorFind the best time to sleep or wake up using 90-minute sleep cycles, plus nap timings and hours by age.Health & FitnessBMR CalculatorEstimate the calories your body burns at rest with Mifflin-St Jeor, Harris-Benedict and Katch-McArdle.Health & FitnessWater Intake CalculatorWork out how much water to drink each day from your weight, exercise, climate and pregnancy or breastfeeding.Health & FitnessFever Temperature CheckerIs it a fever? Check a thermometer reading in °C or °F by method and age, with when-to-call-a-doctor guidance.Health & FitnessBody Fat CalculatorEstimate your body fat percentage from a few tape measurements, with ACE categories, fat mass and lean mass.Health & FitnessIdeal Weight CalculatorRobinson, Miller, Devine and Hamwi ideal weight, the healthy BMI range, plus adjusted and predicted body weight.Health & FitnessPeriod CalculatorPredict your next six periods with a countdown and calendar, and log past cycles to learn your real average.Health & FitnessPosture & Break ReminderDesk reminders for the 20-20-20 eye rule, posture checks and stretch breaks, with notifications and simple stretches.Health & FitnessRecipe Nutrition CalculatorAdd your ingredients and servings to get calories, macros, sodium, sugars and more per serving — USDA data.Health & FitnessSteps to Km ConverterTurn steps into kilometres or miles (and back) from your stride length, with a calorie estimate and goal progress.Health & FitnessSugar Intake CalculatorYour daily free-sugar limit from WHO, NHS and AHA guidance, plus a log of sugar in today’s drinks and snacks.Health & FitnessMeal Plan GeneratorGenerate a 7-day meal plan for your calories and diet — Indian or Western, with a shopping list to print.Health & FitnessMacro CalculatorTurn your calorie target into daily and per-meal grams of protein, carbs and fat — balanced, low-carb, keto or custom.Health & FitnessProtein CalculatorGet your daily protein target in grams, then look up protein per 100 g and per portion in over 300 foods.Health & FitnessBAC CalculatorEstimate blood alcohol over time from your drinks, weight and sex with the Widmark formula — an estimate only.Health & FitnessBreathing Exercise TimerGuided box, 4-7-8, coherent and physiological-sigh breathing or your own pattern, with visual and sound cues.Health & FitnessBlood Pressure LogCheck a reading on a blood pressure chart (ACC/AHA, ESC, ESH, NICE), log readings, see averages and print a report.Health & FitnessAlcohol Unit CalculatorCount UK alcohol units, US and Australian standard drinks and grams of alcohol, and compare with the 14-unit guide.Health & FitnessCaffeine CalculatorAdd up your coffee, tea and energy drinks, compare with the 400 mg guide and see how much is left at bedtime.Health & FitnessFiber Intake CalculatorFind your recommended daily fibre by age and sex, then log foods to see how much fibre you actually eat.Health & FitnessOvulation CalculatorFind your fertile window, ovulation day, next period and test date for up to six cycles ahead.Health & FitnessDiet Chart MakerBuild a printable one-day diet chart with meal times, portions, calories and a water goal — in your browser.Health & FitnessOnline MagnifierTurn your phone camera into a magnifying glass: zoom, freeze, high contrast and the torch for small print.Health & FitnessWaist-to-Hip Ratio CalculatorWaist-to-hip ratio against WHO cut-offs, or waist-to-height ratio with NICE bands, plus apple or pear shape.Health & FitnessHeart Age CalculatorYour heart age and 10-year heart risk from age, blood pressure, BMI or cholesterol, smoking and diabetes.Health & FitnessCholesterol Ratio CalculatorWork out your total-to-HDL cholesterol ratio, LDL/HDL, triglyceride/HDL and non-HDL, in mg/dL or mmol/L.Health & FitnessMedication Schedule MakerTurn your medicines into a timetable, a tick chart, a medication list, a wallet card and pill reminders.Health & FitnessVaccination ScheduleEnter a date of birth to get every vaccine due date (India UIP, IAP 2023 or WHO), tick doses done and print a card.Health & FitnessIntermittent Fasting CalculatorWork out your eating window for 16:8, 18:6, 20:4, OMAD, 5:2 or alternate-day fasting, and time your fast.Health & FitnessTabata TimerTabata, HIIT, EMOM or your own rounds and sets — a big countdown with beeps, voice cues and screen wake lock.Health & FitnessNet Carbs CalculatorNet carbs from any nutrition label — US or UK style — with the sugar alcohol rules, plus a food lookup and day total.Health & FitnessDog Age CalculatorConvert dog years to human years by size, with the DNA-based formula, the old 7× rule, life stage and a chart.Health & Fitnessmg/dL to mmol/L ConverterBlood test results between mg/dL and mmol/L or µmol/L: glucose, cholesterol, creatinine and more.Health & FitnessPace CalculatorWork out running pace, finish time or distance in km or miles, with splits and race-time predictions.Health & FitnessHeart Rate Zone CalculatorCompare five max heart rate formulas by age, then get five training zones by % of max HR or Karvonen reserve.Health & FitnessBlood Sugar LogBlood sugar chart with ADA 2026 ranges, plus a glucose log in mg/dL or mmol/L with targets, time in range and A1c.Health & FitnessChild Growth Percentile CalculatorFind a child’s weight, height, head and BMI percentiles on the CDC growth charts and plot growth over time.Health & FitnessPace ConverterConvert running pace between minutes per km and per mile, km/h, mph, m/s and a 400 m lap, with a chart.Health & FitnessCat Age CalculatorConvert your cat’s age to human years with the vets’ feline life-stage chart, and see which life stage it is in.Health & FitnessVO2 Max CalculatorEstimate VO2 max from the Cooper 12-minute run, a 1.5-mile run, the Rockport walk, heart rate or cycling power.Health & FitnessRace Time PredictorPredict your 5K, 10K, half marathon or marathon time from a recent race, with the Riegel formula shown.Health & FitnessTreadmill Pace CalculatorConvert treadmill speed in km/h or mph to pace per km and mile, with race times and an incline-adjusted pace.Health & FitnessLeague Table & Goal Difference CalculatorType match results to get a league table with points, goal difference and your own tie-breaker order.Health & FitnessPregnancy Weight Gain CalculatorRecommended pregnancy weight gain by pre-pregnancy BMI, week by week, for one baby or twins (IOM 2009).Health & FitnessTournament Bracket GeneratorSingle or double elimination brackets with seeding and byes, or a round robin — click to advance, print as PDF.Health & FitnessOne Rep Max CalculatorEstimate your one-rep max from a set of 1–12 reps with seven formulas, plus a percentage chart and an RPE chart.Health & FitnessA1C CalculatorConvert HbA1c % to estimated average glucose in mg/dL and mmol/L, and to IFCC mmol/mol — or back again.Health & FitnessMarathon Pace ChartTurn a target finish time into pace per km and mile, 5 km or mile splits and a printable goal-time table.Health & FitnessLarge Print MakerTurn any text into a clear large-print PDF (18 pt and up), or print a large-print word search or calendar.Health & FitnessConception Date CalculatorWork out when conception probably happened from a due date, last period or date of birth, with the fertile window.Health & FitnessBarbell Plate CalculatorWhich plates to load on each side for any target weight, from the plates your gym actually has — kg or lb.Health & FitnessBatting Average CalculatorCricket batting average with not outs, or baseball and softball AVG, OBP, SLG and OPS from a stat line.Health & FitnessBowling Score CalculatorScore ten-pin bowling frame by frame with strikes, spares and the 10th frame, for up to six players.Health & FitnessMedical ID Card MakerMake a wallet-size medical ID and emergency contact card to print, plus a phone lock-screen image — on your device.Health & FitnessBasketball Stat Sheet & TrackerTrack points, rebounds, assists and fouls live with undo, get FG%, eFG% and TS%, or print a blank stat sheet.Health & FitnessBike Size CalculatorFind your road, mountain or hybrid frame size from your inseam or height, plus kids bike wheel size and saddle height.Health & FitnessGlasses Prescription ReaderRead SPH, CYL, AXIS, ADD, PD and prism, transpose plus and minus cylinder, and get the spherical equivalent.Health & FitnessCricket Run Rate CalculatorCurrent and required run rate with overs counted as balls, a projected total, plus an annual business run rate.Health & FitnessCricket Strike Rate & Economy CalculatorBatting strike rate, bowling strike rate, economy rate and averages from runs, balls, overs and wickets.Health & FitnessGlycemic Load CalculatorGlycemic load of a food or meal from published GI values and your portion’s carbs, with low/medium/high bands.Health & FitnessSwim Pace CalculatorFind your swim pace per 100 m or 100 yards, a race time for any distance, and your critical swim speed.Health & FitnessFantasy Points CalculatorTurn stat lines into fantasy points with your own scoring table for cricket, football, NFL, NBA or AFL.Health & FitnessBeep Test (Multi-Stage Fitness Test)Play the 20 m multi-stage fitness test with beeps by level, then convert your level and shuttle into a VO2 max estimate.Health & FitnessContact Lens Power CalculatorConvert a glasses prescription to contact lens power with the vertex distance formula, including astigmatism.Health & FitnessNet Run Rate CalculatorCricket NRR by the ICC method, with the all-out rule, a full points table and a “what margin do we need” solver.Health & FitnessHearing Test (Tone Screening)Play pure tones from 250 Hz to 8 kHz in each ear, mark the quietest you hear and get a rough, uncalibrated audiogram.Health & FitnessGolf Handicap CalculatorScore differentials, Handicap Index (best 8 of 20) and Course Handicap by the World Handicap System, with 9-hole rounds.Health & FitnessBig Text DisplayType a message and see it as large as your screen allows, full screen, scrolling or mirrored.Health & FitnessColour Vision TestDot-pattern number plates and a hue-ordering test that screen for red-green and blue-yellow colour vision deficiency.Health & FitnessCycling Power Zones & W/kg CalculatorTurn your FTP or a 20-minute test into seven Coggan power zones in watts, with zone 2 and watts per kg.Health & FitnessMedicine Dose Calculator (mg/kg)Turn a prescribed mg/kg dose, a weight and a liquid’s strength into mg and mL per dose, with your own maximum cap.Health & FitnessPack-Year CalculatorWork out pack-years from cigarettes, bidis or cigars per day and years smoked, with several periods.Health & FitnessEye Test ChartTrue-size Snellen, LogMAR and tumbling-E charts for any distance, on a calibrated screen or printed at 100%.Health & FitnessNutrition Label GeneratorMake a printable US FDA Nutrition Facts label or an India FSSAI nutrition table, with the official rounding.Health & FitnessDLS Target EstimatorEstimate a rain-revised cricket target and par scores with the Duckworth–Lewis method, for ODI or T20.Health & FitnessFFMI CalculatorFat-free mass index from height, weight and body fat %, height-normalised as in the 1995 Kouri study.Health & FitnessWilks / DOTS / IPF GL Points CalculatorScore your squat, bench and deadlift total against body weight with Wilks 2020, DOTS and IPF GL points.Health & FitnessInsulin-to-Carb Ratio & Correction Factor CalculatorRule-of-thumb carb ratio and correction factor from your own total daily insulin dose — never a dose.Health & FitnessACFT CalculatorScore the Army Fitness Test that replaced the ACFT — points per event, total and pass/fail by standard.Health & FitnessChinese Gender PredictorThe traditional Chinese baby gender chart, read with real lunar dates. A folk chart for fun — no scientific basis.Health & FitnesshCG Doubling Time CalculatorWork out the doubling time and percentage rise of beta-hCG from two or three blood test results.Health & Fitness

Health calculators for weight, food, fitness and cycles

Small numbers help with big health goals. Knowing your BMI, the calories you burn in a day or the protein you need makes it easier to plan meals, set a realistic target and notice progress. These free health and fitness calculators turn a few measurements into clear results: the BMI calculator with WHO and Asian cut-offs, the calorie calculator for maintenance and weight-loss targets, the BMR calculator for the energy you burn at rest, and the body fat calculator that works from a tape measure.

For training there are heart rate zones, a one-rep max estimator for strength work and a pace calculator for runners. For daily habits there are water intake and sleep cycle calculators. For women’s health there are a period calculator, an ovulation calculator and a pregnancy due date calculator with milestone dates. Each tool names the method it uses, such as the Mifflin-St Jeor equation or the US Navy body fat formula, and the body measurement tools accept metric or imperial units.

Your height, weight and cycle dates are personal, so every calculation runs in your browser and nothing is sent to a server. The results are estimates based on population formulas, not medical advice or a diagnosis; talk to a doctor, dietitian or midwife before making major changes to your diet, training or medication. Used with that in mind, they are a useful way to understand your body and to track progress over months rather than days.

BMI, body fat or waist-to-hip ratio?

Each measure tells you something different, and they work best together.

  • BMI compares weight with height. It is quick and widely used for screening, but it cannot tell muscle from fat, so a muscular athlete can score “overweight” while being lean.
  • Body fat percentage estimates how much of your weight is fat. The tape-measure method is less precise than a clinical scan, but it is good for tracking change over months.
  • Waist-to-hip ratio looks at where fat is stored. Fat carried around the waist is linked with higher health risk, which is why the waist-to-hip ratio calculator uses WHO cut-offs.
  • Ideal weight formulas such as Devine and Robinson give a single reference figure for your height, and the ideal weight calculator compares them with the healthy BMI range.

From calories to a plan you can follow

The nutrition tools build on each other. BMR is the energy your body uses at rest; multiply it by an activity factor and you get TDEE, your maintenance calories. Eating somewhat below TDEE leads to gradual weight loss, and the macro calculator then splits your target into grams of protein, carbohydrate and fat. A few practical tips:

  • Weigh and measure at the same time of day, ideally in the morning, so changes reflect progress rather than meals and water.
  • Recalculate after every few kilograms of change, because your calorie needs fall as you get lighter.
  • Treat calories burned during exercise as a rough guide and judge by the trend in your weight over several weeks.
  • Cycle predictions assume regular cycles. If yours vary, log several months in the period calculator so it can learn your real average.
  • Switching between kg and stone, or feet and centimetres? The unit converters handle body measurements too.

Health & Fitness: frequently asked questions

What is a healthy BMI?

For most adults the WHO healthy range is 18.5 to 24.9. Guidance used in India and other Asian countries sets lower cut-offs, with overweight starting at 23, because health risks rise at a lower BMI in Asian populations.

What is the difference between BMR and TDEE?

BMR is the calories your body burns at complete rest just to keep you alive. TDEE adds everything you do on top, from walking to workouts, and is the number to use when setting a daily calorie target.

How accurate is the body fat calculator?

It gives a reasonable estimate for most people, but it is less precise than a DEXA scan or other clinical methods. Measure carefully at the same spots each time and focus on the trend rather than a single reading.

How is a pregnancy due date calculated?

The standard method, Naegele’s rule, adds 280 days (40 weeks) to the first day of your last menstrual period. Your doctor or midwife may adjust the date after an early ultrasound scan.

How much water should I drink a day?

Needs vary with body size, activity, climate and health, so there is no single number for everyone. The water intake calculator starts from your weight and adds allowances for exercise, hot weather and pregnancy or breastfeeding.

Why does the sleep calculator use 90-minute cycles?

Sleep moves through light, deep and REM stages in cycles that last roughly 90 minutes on average. Waking at the end of a cycle rather than from deep sleep can help you feel less groggy.