Health Calculators
Free web tools to monitor health metrics. Calculate BMI, body fat percentage, calorie requirements, macro splits, and track ovulation or period cycles. All computations and utility operations are processed **100% client-side** inside your web browser. No document or data is ever uploaded to a server.
BMI Calculator
Free Online BMI Calculator. Calculate your Body Mass Index (BMI) using metric or imperial units. Includes WHO weight classifications, an interactive visual gauge, and healthy weight range calculation.
Body Fat Calculator
Calculate your body fat percentage using the US Navy circumference method or BMI method. Get fat mass, lean mass, and health categories.
Calorie Calculator
Free Online Calorie Calculator. Estimate your daily calorie requirements using the Mifflin-St Jeor formula. Includes activity multipliers, weight loss, and weight gain projections.
Drug Dose Calculator
Calculate medication doses based on body weight for child and adult over-the-counter formulas. Free reference tool for paracetamol, ibuprofen, amoxicillin, and more.
Ideal Weight Calculator
Calculate your ideal body weight free using Devine, Robinson, Miller, and Hamwi formulas. Compare against healthy BMI ranges and get custom weight targets.
Intermittent Fasting Timer
Use our intermittent fasting timer to track fasting windows for 16:8, 18:6, 20:4, and OMAD schedules. Get live countdowns, progress bars, and benefits.
Macro Calculator
Calculate your daily macronutrient targets. Customize your protein, carbohydrate, and fat splits for weight loss, maintenance, or muscle gain.
Ovulation Calculator
Calculate your ovulation date, fertile window, and next expected period. Plan the best days to conceive with our interactive fertility calendar.
Period Tracker
Track your menstrual cycle, estimate future periods, and calculate fertile windows for the next 3 months. Simple, private, and 100% free period tracker.
Pregnancy Due Date Calculator
Calculate your pregnancy due date free. Enter your last period date and get EDD, trimester dates, and key milestones.
Sleep Cycle Calculator
Calculate the best bedtime and wake up times based on sleep cycles. Avoid grogginess by waking up at the end of a natural 90-minute sleep cycle.
Water Intake Calculator
Calculate your daily water intake requirements. Enter your weight, activity level, climate, and conditions to find your exact hydration goals.