Free health and nutrition calculators from MyOrganicBD. Enter a few numbers and get an instant estimate, with no sign-up. Results are estimates for general guidance, not medical advice.

Weight and body size

BMI CalculatorCheck your BMI with standard and Asian cut-offs, waist-to-height ratio and child percentiles.

Lean Body Mass CalculatorCompare four lean body mass formulas or use your body fat %, with FFMI and resting calories.

FFMI CalculatorYour fat-free mass index from body fat % or a tape measure, compared with adults and college athletes.

Body Fat CalculatorCompare the Navy tape, skinfold, relative fat mass and BMI methods side by side, with healthy ranges for your age.

Army Body Fat CalculatorCheck the 2026 Army waist-to-height standard, your maximum waist for your height and other services.

Calories and energy

Calorie CalculatorDaily calories to maintain, lose or gain weight, from the 2023 National Academies equations.

TDEE CalculatorFind how many calories you burn a day, compare five formulas and check it against your own weight log.

Calories Burned CalculatorCalories for 60 activities, treadmill speed and incline, or your heart rate, adjusted to your body.

BMR CalculatorFind out how many calories your body burns at rest.

Nutrition

Nutrition CalculatorPaste a recipe or add foods to get a Nutrition Facts label per serving from USDA data.

Macro CalculatorSplit your daily calories into protein, carbs and fat.

DRI CalculatorSee your daily nutrient needs based on the Dietary Reference Intakes.

Sugar Intake CalculatorFind a sensible daily limit for added sugar.

Caffeine and sleep

Caffeine CalculatorSee how much caffeine is left at bedtime and the latest time for one more cup.

Hydration

Water Intake CalculatorGet your daily water goal by weight, activity and climate, with a sweat test and tracker.

Meal timing

Intermittent Fasting CalculatorFind your eating window for 16:8, 18:6, OMAD or 5:2, with a live timer and calendar file.

Fitness

Steps to Calories and Miles CalculatorTurn steps into miles and calories burned walking or running, by height, pace and incline.

VO2 Max CalculatorEstimate your VO2 max four ways and see your percentile and fitness age.

One Rep Max CalculatorEstimate your 1RM for any lift from one set, with all 7 formulas, a percentage chart and plates per side.

Heart Rate Zone CalculatorFind your max heart rate with 5 formulas and your 5 training zones, zone 2 and target heart rate by age.

Protein Intake CalculatorHow much protein you need a day for health, weight loss or muscle, with per-meal targets and foods.

Healthy aging

Biological Age CalculatorEstimate your biological age from 9 routine blood tests, or score your heart-health habits.

Free quizzes

Want to know your Ayurvedic body type? Take our free dosha quiz, or browse all health quizzes.

Calculators