❤️Health & Fitness
Free health and fitness calculators: BMI, BMR, daily calories, body fat, ideal weight and more. Private and instant.
⚖️ BMI Calculator Free BMI calculator for adults. Enter your height and weight in metric or imperial units to find your Body Mass Index and weight category instantly. ⚖️ Adjusted Body Weight Calculator Free adjusted body weight calculator. Enter sex, height and weight to get ideal body weight (Devine) and adjusted body weight from the standard ABW formula. 🍺 Alcohol Units Calculator Free alcohol units calculator: enter your drink volume and ABV to get UK alcohol units, US standard drinks, grams of pure alcohol, and an estimate of drinks. 🎖️ Army Body Fat Calculator Free US Army body fat calculator using the AR 600-9 tape test. Enter waist, neck, height and hip to estimate body fat and check it against Army limits. 🍺 Blood Alcohol Calculator Free blood alcohol calculator: estimate your BAC from sex, body weight, standard drinks, and the hours since your first drink using the Widmark formula. 🩺 Blood Pressure Category Free blood pressure category checker: enter your systolic and diastolic numbers to see if your BP is normal, elevated, stage 1, stage 2 or crisis per ACC/AHA. 🔥 BMR Calculator Free BMR calculator using the Mifflin-St Jeor equation. Enter sex, age, height and weight in metric or imperial to find your basal metabolic rate in kcal/day. 📏 Body Fat Calculator Free body fat calculator using the US Navy method. Enter height, neck, waist (and hip for women) to estimate your body fat percentage in metric or imperial. 📏 Body Frame Size Calculator Free body frame size calculator. Enter your sex, height and wrist size to find if you have a small, medium or large frame from the height-to-wrist ratio. 🧮 Body Surface Area Calculator Free body surface area calculator using the Mosteller formula. Enter height and weight in metric or imperial units to get your BSA in square meters fast. ☕ Caffeine Calculator Free caffeine calculator: enter your caffeine dose and hours elapsed to see how much caffeine stays in your system over time, based on a 5-hour half-life. 📉 Calorie Deficit Calculator Free calorie deficit calculator: enter your maintenance calories and a weekly weight loss goal to get the daily deficit and calorie target for losing weight. 🔥 Calories Burned Calculator Free calories burned calculator using MET values. Pick an activity, enter your weight and the minutes, and see how many calories you burned in exercise. 🐱 Cat Age Calculator Free cat age calculator: convert your cat years to human years instantly. Enter age in years and months to see the human equivalent and your cat life stage. 📏 Child Height Predictor Predict your child's adult height with the mid-parental method. Enter the sex plus mother and father height in cm or feet to get an estimate and range. 🫀 Cholesterol Ratio Calculator Free cholesterol ratio calculator. Enter total, HDL and LDL cholesterol to get your total-to-HDL and LDL-to-HDL ratios with a general risk band in seconds. 🤰 Conception Date Calculator Free conception date calculator: estimate when you conceived from your last period (LMP) or due date, with a likely conception window. Quick and private. 💪 Creatine Dosage Calculator Free creatine dosage calculator. Enter your body weight to get your daily loading dose split into four servings plus your maintenance dose, all in grams. 🚴 Cycling Calories Calculator Free cycling calories calculator. Enter your weight, ride duration and intensity to see calories burned cycling using research-based MET values for each pace. 🐕 Dog Age Calculator Free dog age calculator: convert your dog age to human years with the modern AVMA-style method, adjusted for small, medium, or large breed size in seconds. 🤰 Pregnancy Due Date Calculator Free pregnancy due date calculator using the Naegele rule: enter your last period date and cycle length to get your estimated due date, week, and trimester. 🌾 Fiber Intake Calculator Free fiber intake calculator: find how much fiber you need per day by age, sex or calories. Get your daily fiber target in grams from trusted health guidelines. ⚖️ Ideal Weight Calculator Free ideal weight calculator: enter sex and height (metric or imperial) to get a Devine-formula weight plus a healthy BMI-based range for your height. ⏱️ Intermittent Fasting Calculator Free intermittent fasting calculator: pick 16:8, 18:6, 20:4 or OMAD, set your start time, and get your fasting window end and eating window schedule instantly. 🥑 Keto Macros Calculator Free keto macros calculator: turn your daily calorie target into grams of fat, protein and net carbs using standard keto ratios or a custom net carb cap. 💪 Lean Body Mass Calculator Free lean body mass calculator using the Boer formula. Enter sex, weight and height in metric or imperial to find your LBM and body fat mass instantly. 🥗 Macro Calculator Free macro calculator: enter your daily calories and pick a goal to split them into grams of protein, carbs and fat. Balanced, low-carb or high-protein presets. ❤️ Max Heart Rate Calculator Free max heart rate calculator. Enter your age to estimate your maximum heart rate using both the classic 220 minus age and the Tanaka 208 - 0.7 x age formulas. 🏋️ One Rep Max Calculator Free one rep max calculator. Enter the weight and reps you lifted to estimate your 1RM with the Epley and Brzycki formulas, plus a training percentage table. 🌸 Ovulation Calculator Free ovulation calculator: enter your last period date and cycle length to estimate your ovulation day and fertile window so you can plan or track conception. 🏃 Pace Calculator Free running pace calculator: enter any two of distance, time, and pace to get the third, plus your speed in km/h and mph and finish times for 5K to marathon. 🩸 Period Calculator Free period calculator: enter your last period and cycle length to predict your next period dates, ovulation day and estimated fertile window in seconds. 📏 Ponderal Index Calculator Free ponderal index calculator. Enter weight and height in metric or imperial units to get your corpulence index in kg/m³, a BMI alternative for tall people. 🤰 Pregnancy Trimester Calculator Free pregnancy trimester calculator: find out what trimester you are in, how many weeks pregnant you are, and the date range of each trimester from your LMP. 🤰 Pregnancy Weight Gain Calculator Free pregnancy weight gain calculator: enter your pre-pregnancy height, weight and current week to see the IOM recommended healthy weight gain range by BMI. 🍗 Protein Intake Calculator Protein intake calculator: enter body weight and goal to estimate daily protein needs in grams, and see how much protein you need to maintain or build muscle. 🏃 Race Time Predictor Predict your race time at a new distance with the Riegel formula. Enter a recent result and a target distance to get a predicted finish time and pace per km. 🏃 Running Calories Calculator Free running calories calculator. Enter your weight and distance, add a pace if you like, and see calories burned running and the calories per mile instantly. 😴 Sleep Calculator Free sleep calculator using 90-minute cycles. Enter your wake time to find the best bedtimes, or your bedtime to find ideal wake-up times for rested mornings. 🚭 Smoking Cost Calculator Free smoking cost calculator: enter cigarettes per day, pack size and price to see the daily, monthly, yearly and 10-year cost, plus what quitting saves. 👟 Steps to Calories Calculator Free steps to calories calculator. Convert your step count into calories burned from weight, height and walking pace. See how many calories 10,000 steps burn. 🍬 Sugar Intake Calculator Free daily sugar intake calculator. Find your recommended added sugar limit in grams and teaspoons from your calories or sex, using WHO and AHA guidance. 🏊 Swimming Calories Calculator Free swimming calories calculator: pick your stroke and intensity, enter weight and minutes, and see calories burned swimming using the validated MET formula. ❤️ Target Heart Rate Calculator Free target heart rate calculator. Enter your age (and resting pulse) to get your max heart rate and training zones from 50 to 85% using the Karvonen method. 🔥 TDEE Calculator Free TDEE calculator: enter sex, age, height, weight and activity level to find your maintenance calories plus rough cut and bulk targets. Uses Mifflin-St Jeor. 🫁 VO2 Max Calculator Free VO2 max calculator. Estimate your aerobic fitness from resting and maximum heart rate using the Uth formula, then read off your VO2 max rating band. 📏 Waist to Hip Ratio Calculator Free waist to hip ratio calculator: enter your waist, hip and sex to instantly get your WHR plus the WHO health risk band, whether low, moderate or high. 📐 Waist to Height Ratio Calculator Free waist-to-height ratio calculator. Enter your waist and height in cm or inches to get your WHtR instantly, with a clear healthy or high-risk band. 💧 Water Intake Calculator Free water intake calculator. Enter your body weight and exercise minutes to estimate how much water to drink each day in litres, US cups and fluid ounces. ⏱️ Weight Loss Timeline Calculator Free weight loss timeline calculator: enter your current and goal weight plus a weekly rate to see how many weeks to lose it and your estimated goal date.
Understanding your body starts with a few simple measurements. Our health calculators turn your height, weight and activity into useful screens like BMI and daily calorie needs, with plain-language notes on what the numbers do, and do not, tell you.
These tools are for general information, not medical diagnosis. Speak to a healthcare professional before making decisions about your health. Your inputs stay on your device.