Health & Fitness Calculators
BMI, BMR, TDEE, Calorie Needs, & Heart Rate Zones.
General
2Body Metrics
12BMI Prime Calculator
Calculate BMI Prime ratio comparing body mass index to upper normal limit (25.0).
Body Fat Percentage Calculator
Estimate body fat percentage using the U.S. Navy circumference method.
Ideal Weight Calculator
Calculate estimated ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.
BMR Calculator
Calculate Basal Metabolic Rate (BMR) using Mifflin-St Jeor and Harris-Benedict equations.
TDEE Calculator
Calculate Total Daily Energy Expenditure (TDEE) based on activity level.
Lean Body Mass Calculator
Calculate Lean Body Mass (LBM) and fat mass from weight and body fat percentage.
Body Surface Area Calculator
Calculate Body Surface Area (BSA) using the Mosteller formula.
Waist-to-Height Ratio Calculator
Calculate Waist-to-Height Ratio (WHtR) to assess central adiposity.
Waist-to-Hip Ratio Calculator
Calculate Waist-to-Hip Ratio (WHR) to assess fat distribution pattern.
Calorie Deficit Calculator
Calculate daily intake targets and theoretical weekly fat loss based on calorie deficit.
Macro Calculator
Calculate daily protein, carbohydrate, and fat gram targets.
Protein Intake Calculator
Calculate daily protein requirements based on body weight and activity level.
Pregnancy
6Pregnancy Due Date Calculator
Estimate pregnancy due date using Naegele’s rule from Last Menstrual Period (LMP).
Pregnancy Week Calculator
Calculate current gestational age in weeks and days and identify trimester.
Conception Date Calculator
Estimate conception date from due date or last menstrual period.
Ovulation Calculator
Estimate ovulation date and fertile days based on menstrual cycle length.
Fertile Window Calculator
Calculate the 6-day fertile window for conception planning.
Pregnancy Weight Gain Calculator
Calculate Institute of Medicine (IOM) recommended pregnancy weight gain ranges.
Fitness
13Calorie Burn Calculator
Estimate calories burned during physical activities using MET values.
Running Pace Calculator
Calculate running pace per kilometer and per mile from time and distance.
Running Speed Calculator
Calculate average running speed in km/h and mph.
Running Time Calculator
Estimate total running time from distance and target pace.
1RM Strength Calculator
Calculate One-Rep Max (1RM) using Epley and Brzycki strength formulas.
VO2 Max Calculator
Estimate aerobic capacity (VO2 Max) using Cooper or Rockport field tests.
Water Intake Calculator
Calculate daily fluid hydration targets based on body weight and exercise activity.
Heart Rate Zone Calculator
Calculate 5 training heart rate zones using Tanaka and Karvonen formulas.
Target Heart Rate Calculator
Calculate target heart rate for specific exercise intensity percentages.
Steps to Distance Calculator
Convert daily step counts to kilometers and miles based on stride length.
Walking Pace Calculator
Calculate walking pace per kilometer and per mile.
Cycling Calories Calculator
Calculate calories burned during outdoor cycling or stationary biking.
Swimming Calories Calculator
Calculate calories burned swimming freestyle, breaststroke, butterfly, or leisure laps.