Health & Fitness
BMI, calorie, heart rate, and wellness calculators
BMI Calculator
Calculate Body Mass Index with detailed categories and healthy weight range.
Open Tool →BMR Calculator
Calculate Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict equations.
Open Tool →TDEE Calculator
Calculate Total Daily Energy Expenditure based on BMR and activity level.
Open Tool →Calorie Intake Calculator
Estimate daily calorie needs for weight loss, maintenance, or gain.
Open Tool →Macro Nutrient Calculator
Calculate daily protein, carbs, and fat targets based on your goals.
Open Tool →Water Intake Calculator
Estimate how much water you should drink daily based on weight and activity.
Open Tool →Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy method.
Open Tool →Ideal Body Weight Calculator
Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.
Open Tool →Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio and assess health risk category.
Open Tool →Heart Rate Zone Calculator
Calculate heart rate training zones based on max heart rate.
Open Tool →Max Heart Rate Calculator
Estimate maximum heart rate using multiple formulas.
Open Tool →VO2 Max Estimator
Estimate VO2 max from running or cycling performance data.
Open Tool →One-Rep Max Calculator
Estimate your one-rep max from submaximal lifts using multiple formulas.
Open Tool →Plate Loading Calculator
Calculate which plates to load on a barbell for a target weight.
Open Tool →Running Pace Calculator
Calculate pace, distance, or time for running workouts.
Open Tool →Cycling Speed / Power Calculator
Estimate cycling speed from power or power needed for a target speed.
Open Tool →Swimming Pace Calculator
Calculate swimming pace per 100m, split times, and total time.
Open Tool →Steps to Distance Converter
Convert step count to distance based on stride length.
Open Tool →Calories Burned Estimator
Estimate calories burned by activity type, duration, and body weight.
Open Tool →Pregnancy Due Date Calculator
Estimate due date from last menstrual period or conception date.
Open Tool →Ovulation Calculator
Estimate ovulation date and fertile window from cycle data.
Open Tool →Baby Growth Percentile Calculator
Plot baby weight and length against WHO growth percentile charts.
Open Tool →Sleep Cycle Calculator
Calculate optimal bedtime or wake time based on 90-minute sleep cycles.
Open Tool →BAC Estimator
Estimate Blood Alcohol Content based on drinks, weight, and time.
Open Tool →Medication Dosage Calculator
Calculate weight-based medication dosage for common formulations.
Open Tool →IV Drip Rate Calculator
Calculate IV drip rate in drops/min or mL/hr from volume and time.
Open Tool →Visual Acuity Chart Generator
Generate a Snellen eye chart for visual acuity screening.
Open Tool →Color Vision Test
Ishihara-style color vision test with pseudoisochromatic plates.
Open Tool →Workout Rep / Set Logger
Log workout exercises, sets, and reps with localStorage persistence.
Open Tool →Intermittent Fasting Timer
Track fasting windows with countdown timer and fasting history.
Open Tool →