Health & Fitness
Body measures, nutrition, training, pregnancy, and wellness estimates.
Army Body Fat Calculator
Check the current U.S. Army waist-to-height standard and optionally calculate the legacy 2023 one-site body-fat estimate.
BAC Calculator
Estimate blood alcohol concentration from detailed beer, wine, spirit, and custom beverage amounts using a Widmark-style model.
Bench Press Calculator
Estimate your Bench Press 1RM and generate a pyramid training routine.
BMI Calculator
Calculate BMI, BMI Prime, ponderal index, adult category, and the corresponding healthy-weight range in metric or imperial units.
BMR Calculator
Estimate basal metabolic rate with Mifflin–St Jeor, revised Harris–Benedict, or Katch–McArdle and view activity-adjusted daily energy needs.
Body Fat Calculator
Estimate body-fat percentage with the U.S. Navy circumference method and compare it with a BMI-based estimate.
Body Surface Area Calculator
Calculate body surface area with Mosteller, Du Bois, Haycock, Gehan–George, Boyd, and Schlich formulas.
Body Type Calculator
Classify seven female fashion-industry body-shape categories from bust, waist, high-hip, and hip measurements and calculate waist-to-hip ratio.
Calorie Calculator
Estimate BMR, total daily energy expenditure, a goal-adjusted calorie target, and a seven-day calorie-cycling schedule.
Calorie Needs Calculator
Estimate daily maintenance calories and apply an optional daily adjustment.
Calories Burned Calculator
Estimate activity calories from body weight, duration, and metabolic equivalent (MET), with a time-projection table.
Carbohydrate Calculator
Estimate daily calorie needs and convert a selected carbohydrate share into grams, with a 45–65% reference interval and 130-gram adult comparison.
Conception Calculator
Plan estimated fertile windows, highest-probability days, and possible due dates across upcoming menstrual cycles.
Due Date Calculator
Estimate a pregnancy due date from the last menstrual period, conception, ultrasound dating, or IVF embryo transfer.
Earned Run Average (ERA) Calculator
Calculate baseball earned run average from earned runs and innings pitched.
Fat Intake Calculator
Estimate daily fat grams from total energy needs, show a 20–35% reference interval, and calculate a less-than-10% saturated-fat comparison.
Gestation Calculator
Estimate an animal due date or breeding date from a typical gestation period.
GFR Calculator
Estimate race-free kidney filtration with the 2021 CKD-EPI creatinine equation for adults or the CKiD U25 creatinine equation for ages 1–25.
Healthy Weight Calculator
Calculate the adult weight interval corresponding to BMI 18.5 through 24.9 and compare adjacent BMI categories.
Ideal Weight Calculator
Compare the Robinson, Miller, Devine, and Hamwi ideal-body-weight formulas and the healthy BMI weight range.
Lean Body Mass Calculator
Estimate lean body mass with Boer, James, and Hume adult equations or the Peters pediatric equation.
Low BMI Screening Calculator
Calculate adult BMI and show low-BMI screening ranges without diagnosing an eating disorder.
Macro Calculator
Estimate a goal-adjusted calorie target and translate a balanced, high-protein, lower-carb, very-low-carb, or custom split into daily grams.
One Rep Max Calculator
Estimate one-repetition maximum with seven established formulas or their average and generate a percentage-based training table.
Overweight Calculator
Calculate how much weight you need to lose to reach a normal BMI range.
Ovulation Calculator
Estimate ovulation dates and fertile windows for multiple cycles from the last period, average cycle length, and luteal phase.
Pace Calculator
Calculate pace, elapsed time, or distance and generate cumulative split estimates in kilometers, miles, meters, or yards.
Period Calculator
Forecast period start and end dates, estimated ovulation, and fertile windows for multiple cycles.
Pregnancy Calculator
Estimate due date, conception date, gestational age, trimester, term window, and pregnancy milestones from five dating methods.
Pregnancy Conception Calculator
Back-calculate an estimated conception date and possible intercourse window from a due date, LMP, ultrasound, conception record, or IVF transfer.
Pregnancy Weight Gain Calculator
Compare current pregnancy weight gain with BMI- and pregnancy-type-based total and week-by-week reference ranges.
Protein Calculator
Estimate a weight-based daily protein range for general adult, older-adult, endurance, strength, calorie-deficit, or pregnancy contexts.
Sleep Calculator
Calculate the best bedtimes to wake up feeling refreshed.
Target Heart Rate Calculator
Estimate maximum heart rate and five training zones with percentage-of-maximum or Karvonen heart-rate-reserve calculations.
TDEE Calculator
Estimate basal metabolic rate and total daily energy expenditure with multiple BMR equations and six activity levels.
Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
Weight Watcher Points Calculator
Calculate an unofficial nutrient-based points estimate for educational comparison.
WHIP Calculator
Calculate baseball walks plus hits per inning pitched.
Wilks Calculator
Calculate your Wilks Score to compare strength across different body weights.