Body Index
7BMI CalculatorEnter height in cm and weight in kg to get your Body Mass Index via the Quetelet formula, with underweight-to-obese categories and your healthy weight range.Body Fat CalculatorPick gender and enter age, height, weight plus waist, neck and hip to estimate body fat with the US Navy method and the Deurenberg formula side by side.Ideal Weight CalculatorEnter gender and height to compare the classic Devine, Robinson and Miller formulas side by side, plus the healthy BMI weight range for your height.Waist-to-Hip & Waist-to-Height Ratio CalculatorEnter waist, hip and height in cm plus gender to get WHR (waist-to-hip ratio) and WHtR (waist-to-height ratio) with apple/pear body-shape classification — WHR ≥ 0.90 for men / 0.85 for women indicates central (apple) fat distribution, WHtR uses 0.5 as a simple health threshold.Body Surface Area (BSA) CalculatorEnter height in cm and weight in kg to compute body surface area with the Mosteller, Du Bois or Haycock formulas — BSA in m² is widely used to dose chemotherapy and to express cardiac index; the calculator can show all three formulas side by side for comparison.Child Growth Percentile Calculator (WHO)Enter age in months, gender, height in cm and weight in kg to see where a 0–5 year-old child falls on WHO weight-for-age, height-for-age and BMI-for-age percentiles — P3/P15/P50/P85/P97 bands are shown with a plain-language note; the tool interpolates between WHO reference points.Skinfold Body Fat Calculator (Jackson-Pollock)Enter gender, age and three skinfold thicknesses in mm (chest/abdomen/thigh for men, triceps/suprailiac/thigh for women) to estimate body density and body-fat percentage with the Jackson-Pollock 3-site formula — reference ranges and measurement tips are included.
Energy & Metabolism
6Calorie CalculatorType in grams of protein, carbs and fat to convert them to kilocalories with the 4-4-9 Atwater rule, plus a quick reference table of food calories per 100 g.BMR CalculatorEnter gender, age, height and weight to compute your basal metabolic rate with the Mifflin-St Jeor formula, then your daily burn at light, moderate and high activity.Exercise Calorie Burn Calculator (MET)Enter your weight, exercise duration and tick any number of activities from a 60+ MET table to estimate calories burned per activity and in total — kcal = MET × 3.5 × weight kg ÷ 200 × minutes, the standard metabolic-equivalent formula.TDEE Daily Total Energy Expenditure CalculatorEnter gender, age, height, weight, activity level and goal to compute BMR (Mifflin-St Jeor), TDEE and your target daily calories with protein/carb/fat grams — sedentary ×1.2 up to very active ×1.9.Food Calorie Counter & Nutrition CalculatorSearch and pick from 200+ common foods with per-100g calories, protein, carbs and fat; enter the portion in grams to get calories and macros — add several foods to accumulate a running total for a whole meal.Daily Reference Intake Checker (Salt, Sugar, Fiber)Pick a food and its intake in grams to see how its sodium, added sugar and dietary fibre contribute toward the adult daily reference intakes — sodium < 2000 mg, added sugar < 50 g (25 g better), fibre 25–30 g per day.
Sleep Health
6Sleep Cycle CalculatorEnter your wake-up time and get bedtimes for 4 to 6 full 90-minute sleep cycles, minus 15 minutes to fall asleep, so you wake at the end of a cycle and avoid sleep inertia.Best Sleep & Wake Time Calculator (90-min Cycles)Enter your target wake time (or planned bedtime) and this tool walks back / forward in 90-minute sleep cycles to give you 3–4 schedules — about 4.5 h, 6 h, 7.5 h or 9 h of sleep — so you wake between cycles feeling less groggy.Caffeine Window Calculator (Half-life Timing)Enter when you had caffeine, the dose in mg, its half-life (4/5/6 h) and your planned bedtime — the tool estimates the latest safe intake time so that less than 50% remains at bedtime, plus the estimated remaining % when you go to sleep.Nap Guide — Best Nap Duration & TimingPick a nap length (10 / 20 / 30 / 60 / 90 minutes) and optionally your wake time: get a plain-language explanation of what each duration does, the recommended midday window (about 12:30–14:00) and the latest suggested start.Sleep Debt Tracker — Log & AccumulateLog last night’s actual sleep in hours with your recommended target (7 / 8 / 9 h): the tool computes tonight’s difference (debt or surplus), the running accumulated debt since the first record and your average sleep — all kept in your browser.Sleep Self-Assessment Quiz (10 Questions)Answer 10 simple questions about your sleep (each 0–3 points): falling-asleep time, night awakenings, early waking, daytime sleepiness, snoring, satisfaction, daytime energy, pre-sleep state, routine regularity and morning recovery. Total 0–30 gives a reference band.
Daily Health
5Water Intake CalculatorEstimate how many millilitres of water an adult should drink each day from weight, activity level and hot-weather factor, split into morning, noon and evening sips.Quit Smoking Savings & Health Benefits CalculatorEnter cigarettes per day, price per pack (20 cigs) and days since quitting to see money saved and cigarettes not smoked, plus a body-recovery milestone timeline — after 20 minutes blood pressure drops, after 1 year coronary risk is roughly halved.20-20-20 Eye Rest & Sit-Break ReminderA timer that reminds you every 20 minutes (adjustable 10/20/30) to look 6 metres away for 20 seconds, plus an optional hourly sit-break reminder — with a gentle page banner and optional beep. The 20-20-20 rule reduces digital eye strain.Daily Medication Schedule PlannerEnter the medicine name, times per day (1–4), before/after meals and start date to get a suggested daily dosing timetable — 2 times: 08:00/20:00, 3 times: 08:00/14:00/20:00, 4 times: 08:00/12:00/16:00/20:00 — plus a 7-day sample plan.Health Checkup Checklist by Age & GenderPick your age group (20+/30+/40+/50+/60+) and gender to get a suggested checkup item list — blood routine, urine, blood pressure, BMI as base; 40+ adds lipids, glucose, liver/kidney, abdominal ultrasound; 50+ adds tumor markers, bone density, eye fundus; 60+ adds carotid ultrasound and cognitive screening; women add breast ultrasound and cervical screening, men add prostate items.
Health Records
3Blood Pressure Tracker & Trend ChartLog systolic and diastolic blood pressure with date, optional heart rate and note; the record is classified against the reference ranges (<120/80 normal, 120-139/80-89 normal high, 140-159/90-99 grade 1, ≥160/100 grade 2) and plotted on a trend chart. History stays in your browser only.Blood Glucose Log & Trend ChartLog fasting or 2-hour post-meal blood glucose (mmol/L) with date and optional note; readings are classified against the reference ranges (fasting 3.9–6.1, post-meal 2h under 7.8) and plotted on a trend chart. History stays in your browser only.Weight & Body Fat Tracker with Trend ChartLog weight (kg) and optional body fat percentage (%) with date; the change since your last entry, averages and a dual-series trend chart are computed automatically. History stays in your browser only.
Baby & Maternal
6Baby Growth Percentile Calculator (0–24 Months)Enter your baby’s gender, age in months (0–24) and a weight, length or head-circumference reading to check its WHO 0–2 year growth percentile band — e.g. a 6-month-old boy weighing 8.2 kg falls around P50–P85.Child Vaccination Schedule Checker (0–6 Years)Enter your baby’s current age in months (0–84) to list each routine vaccine dose with its due status — e.g. at 6 months the 3rd HepB and 1st MenA doses are due, with overdue-dose reminders.Pregnancy Weight Gain Calculator (Pre-pregnancy BMI & IOM Range)Enter pre-pregnancy height and weight to get your pre-pregnancy BMI and the IOM recommended total weight gain — e.g. a woman with BMI 22 should gain 11.5–16 kg in pregnancy; add current week and weight to see progress.Baby Complementary Food Timeline (Starting at 6 Months)Enter your baby’s current age in months (0–36) to see the matching complementary-feeding stage — e.g. 7–9 months means varied purees and minced foods, 10–12 months means finger foods and self-feeding practice.Period & Ovulation Forecast CalculatorEnter your average cycle length, period length and the first day of your last period; the tool forecasts the next 6 periods, ovulation windows and safe-day hints, and renders a highlighted 3-month calendar. All computing stays in your browser.Menstrual Cycle Log & Trend AnalysisRecord each period start date, its length (days) and symptoms; the tool computes your average cycle, average period length and a forecast of the next period. History stays in your browser only.
