VivMetric – Free Health Data Calculators
Formula-based body metrics, calorie, hydration and sleep calculations. References: CDC, WHO, NIH public health standards.
17 calculators for body composition, metabolism, activity energy, daily routines and schedule reference.
All calculations run locally in your browser. No data upload, no registration, no medical advice.
Standard reference ranges, calculation formulas and public data sources labeled on each page.
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Body Composition Calculators
Adult BMI Calculator
Calculate Body Mass Index using height and weight with CDC/WHO standard BMI categories reference.
Teen BMI Calculator
BMI percentile estimation for ages 2-19 using CDC pediatric growth chart age and gender ranges.
Body Fat Calculator
Estimate body fat percentage using universal formula methods (BMI-based, Navy, skinfold references).
BMR Calculator
Basal Metabolic Rate calculation using Mifflin-St Jeor and revised Harris-Benedict formulas.
Standard Weight Chart
Reference table of height-corresponding weight ranges based on BMI 18.5–24.9 standard intervals.
Height-Weight Ratio Tool
Height to weight proportional ratio comparison and population percentile reference display.
Metabolism & Calorie Calculators
TDEE Calculator
Total Daily Energy Expenditure: multiply BMR by activity factor levels from sedentary to very active.
Calorie Gap Calculator
Calculate the difference between daily calorie intake and TDEE. Numerical gap display only.
Exercise Calorie Burn
MET-based calorie expenditure for running, swimming, cycling, strength and home activities.
Food Calorie Table
USDA public food calorie and macronutrient reference tables for common food categories.
Weekly/Monthly Calorie Budget
Aggregate daily calorie numbers into weekly (×7) and monthly (×30) reference budgets.
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Hydration, Sleep & Daily Routine Tools
Daily Water Intake
Calculate daily water reference amount based on body weight, air temperature and activity level.
Sleep Cycle Calculator
Calculate optimal bedtime or wake-up time based on 90-minute sleep cycle theory.
Sleep Duration Guide
NIH/National Sleep Foundation age-group sleep duration standard reference ranges only.
Sedentary Time Tracker
Local session-based continuous sitting timer and elapsed duration statistics reference.
Daily Routine Planner
Time interval allocator for meals, hydration reminders, movement breaks and sleep windows.