Body indicators, calories and nutrition, fitness and running, sleep, water, and pregnancy age. Everything you need in one place, from everyday math to specialist tools.
All tools are grouped into sections so you can find what you need quickly.
BMI and adult reference ranges, body fat, waist-to-height and waist-to-hip ratios, body surface area, and reference weight.
Calculate your body mass index and healthy weight range for your height.
Open calculatorSee the weight ranges for each BMI category at your height, using WHO or Asia-Pacific cut-offs.
Open calculatorEstimate body fat percentage with the US Navy circumference method, plus fat mass and lean mass.
Open calculatorCalculate waist-to-height ratio and see where it falls, plus the approximate waist limit at half your height.
Open calculatorCalculate waist-to-hip ratio and compare it with approximate WHO adult thresholds.
Open calculatorCompare several published reference-weight formulas by height and sex, with a clear note on their limits.
Open calculatorCalculate body surface area with the Mosteller and Du Bois formulas from height and weight.
Open calculatorBasal metabolism, total daily energy expenditure, daily calorie targets, macros, meal calories, protein, water, fiber, and nutrition labels.
Calculate total daily energy expenditure from basal metabolic rate and activity level.
Open calculatorEstimate a daily calorie target for maintenance or gradual change, with a protective floor and a warning against aggressive restriction.
Open calculatorCalculate basal metabolic rate with Mifflin-St Jeor, the energy your body needs at complete rest.
Open calculatorAdd up calories for common foods by weight using approximate reference nutrition values.
Open calculatorEstimate a daily fluid range from weight, exercise duration and climate, with a caution against overdrinking.
Open calculatorSplit daily calories across protein, carbohydrates and fat and get grams for each.
Open calculatorEstimate a daily protein range from your weight and activity level, with an approximate amount per meal.
Open calculatorEstimate a daily fiber target by age and sex, with meal distribution and food examples.
Open calculatorCalculate calories from carbohydrates, protein, fat and alcohol using Atwater factors.
Open calculatorConvert per-serving label values into the amount you ate and the whole package, with approximate daily values.
Open calculatorWalking and running speed, pace and distance, splits, race time prediction, calories burned, training heart rate, and training load.
Estimate calories burned during an activity from weight, duration and intensity using MET values.
Open calculatorCalculate running pace per kilometer or mile from distance and time, with average speed.
Open calculatorCalculate speed from distance and time in km/h, mph and m/s, with pace.
Open calculatorEstimate an adult training heart-rate range using percent-of-max or Karvonen.
Open calculatorFind the time needed for a distance at a given pace, or the distance covered in a given time.
Open calculatorPredict a race time from a previous distance and time using the Riegel formula, with clear limits.
Open calculatorPlan even, negative or positive race splits with per-split and half-race times.
Open calculatorCombine up to three splits or laps to calculate average speed, pace and your fastest and slowest split.
Open calculatorEstimate session and weekly training load from perceived exertion, duration and sessions.
Open calculatorEstimated pregnancy age, weekly sleep average, sleep duration between two times, and hydration target coverage.
Calculate gestational age in weeks and days from a reference date, with trimester, progress and days remaining.
Open calculatorCalculate sleep duration from bedtime to wake time, with optional naps and approximate sleep cycles.
Open calculatorEnter sleep hours for seven nights and get the average, total and number of short nights.
Open calculatorCompare the fluids you drank with an estimated target from weight, activity and climate, without claiming a medical hydration measurement.
Open calculatorArithmetic, percentages, algebra, geometry and advanced math.
View allLength and distance, weight and mass, area, volume, temperature and pressure, speed, energy, and data.
View allAge, date differences, Gregorian and Hijri calendars, time zones, and event planning.
View allTaxes, discounts, loans and interest.
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