Fitness and Health Calculators
Body mass index, caloric intake, body fat, pregnancy timelines, macros, and metabolic rates.
Fitness
BMI, daily calorie targets, body fat percentage, BMR, ideal body weight, pace, and heart rate zones.
BMI Calculator
Calculate Body Mass Index (BMI) for adults, identify WHO weight category, and determine healthy weight range.
Calorie Calculator
Calculate daily calorie requirements for weight maintenance, mild weight loss, weight loss, or weight gain.
Body Fat Calculator
Estimate body fat percentage, fat mass, and lean mass using the US Navy tape measure circumference method.
BMR Calculator
Calculate Basal Metabolic Rate (BMR) — the minimum energy burned at rest — using Mifflin-St Jeor and Harris-Benedict formulas.
Ideal Weight Calculator
Compare ideal body weight estimates based on Devine, Robinson, Miller, and Hamwi medical equations.
Pace Calculator
Calculate running pace (minutes/mile or minutes/km), speed (mph/kph), and split finish times for 5K, 10K, Half, and Marathon.
Army Body Fat Calculator
Official US Army tape test body fat calculator and maximum allowable screening standard pass/fail threshold.
Lean Body Mass Calculator
Calculate Lean Body Mass (LBM) — muscle, bone, and organs weight excluding fat — using Boer, James, and Hume formulas.
Healthy Weight Calculator
Find the optimal healthy weight range for your height according to WHO BMI 18.5 to 24.9 guidelines.
Calories Burned Calculator
Calculate total calories burned during running, cycling, swimming, lifting, walking, and sports using MET activity values.
One Rep Max (1RM) Calculator
Calculate your 1-rep maximum lift capacity and training percentage loads (50% to 95%) using Brzycki and Epley equations.
Target Heart Rate Calculator
Calculate training heart rate zones (Zone 1 Recovery to Zone 5 VO2 Max) using the Karvonen formula with resting heart rate.
Pregnancy
Due date calculations, conception dates, pregnancy weight gain, ovulation, and fertile windows.
Pregnancy Calculator
Track gestational age, current trimester, weeks/days pregnant, and important fetal development milestones.
Pregnancy Weight Gain Calculator
Calculate recommended cumulative weight gain targets by week of pregnancy based on Institute of Medicine (IOM) BMI guidelines.
Pregnancy Conception Calculator
Estimate the probable date range when conception occurred based on your estimated due date or ultrasound.
Due Date Calculator
Calculate Estimated Due Date (EDD) using Naegele's rule from first day of last menstrual period (LMP) or IVF transfer date.
Ovulation Calculator
Find your most fertile days, ovulation day, and optimal conception window for this cycle and future months.
Conception Calculator
Determine the exact date of conception and corresponding fertile window from your LMP or delivery date.
Period Calculator
Predict your next 3 menstrual cycle start dates, period durations, and PMS symptom windows.
Other Health
Macronutrient splits, carbohydrate/protein/fat intake, TDEE, GFR, BSA, and BAC blood alcohol content.
Macro Calculator
Calculate daily protein, carbohydrate, and fat gram targets tailored for fat loss, maintenance, or muscle building.
Carbohydrate Calculator
Calculate optimal daily carbohydrate gram recommendations for endurance athletes, strength training, and keto diets.
Protein Calculator
Calculate daily dietary protein requirements based on body weight, activity level, and muscle hypertrophy goals.
Fat Intake Calculator
Determine healthy dietary fat intake in grams and percentage of total daily caloric consumption.
TDEE Calculator
Calculate Total Daily Energy Expenditure (TDEE) — the total calories your body burns in a 24-hour day.
GFR Calculator
Calculate Glomerular Filtration Rate (eGFR) to assess kidney function using the CKD-EPI 2021 creatinine equation.
Body Type Calculator
Determine your female body shape (Hourglass, Pear, Apple, Rectangle, Inverted Triangle) from bust, waist, and hip ratios.
Body Surface Area (BSA) Calculator
Calculate total human body surface area in square meters (m²) using Mosteller and Du Bois formulas.
BAC (Blood Alcohol Content) Calculator
Estimate Blood Alcohol Concentration (BAC) and time until sobriety using the Widmark metabolic formula.