Nutrition — Health and fitness
This directory groups nutrition tools within Health and fitness. These health and fitness tools present formula-based estimates, not diagnoses or individualized treatment plans. The collection separates body measurements, nutrition, training, pregnancy timing and clinical relationships so that the purpose of a result is clear before you enter personal values. A reference interval can describe a population without identifying the right target for a particular person. Measurement method, age, life stage and the assumptions of the formula all matter.
Start with these tools
BMR Calculator
Estimate basal metabolic rate with Mifflin–St Jeor, revised Harris–Benedict, or Katch–McArdle and view activity-adjusted daily energy needs.
Calorie Calculator
Estimate BMR, total daily energy expenditure, a goal-adjusted calorie target, and a seven-day calorie-cycling schedule.
Estimate Maintenance Energy Needs
Estimate maintenance energy using the selected Mifflin–St Jeor constant and activity factor, rather than a weight-loss plan.
Calories Burned Calculator
Estimate activity calories from body weight, duration, and metabolic equivalent (MET), with a time-projection table.
Carbohydrate Calculator
Estimate daily calorie needs and convert a selected carbohydrate share into grams, with a 45–65% reference interval and 130-gram adult comparison.
Read each tool’s limitations and confirm the units before using an estimate. Pregnancy dates are approximate and do not establish an exact conception day. Body-size screening measures do not capture every aspect of health or body composition. Nutrition examples illustrate an equation rather than prescribing an intake. A qualified clinician can interpret a result alongside information that a browser tool does not have. Calculations run locally, but shared URLs, downloaded reports and browser history can contain the values you enter. Use the available privacy controls, avoid sending sensitive input sets to other people unintentionally, and seek professional guidance for decisions about your care.
nutrition
BMR Calculator
Estimate basal metabolic rate with Mifflin–St Jeor, revised Harris–Benedict, or Katch–McArdle and view activity-adjusted daily energy needs.
Calorie Calculator
Estimate BMR, total daily energy expenditure, a goal-adjusted calorie target, and a seven-day calorie-cycling schedule.
Estimate Maintenance Energy Needs
Estimate maintenance energy using the selected Mifflin–St Jeor constant and activity factor, rather than a weight-loss plan.
Calories Burned Calculator
Estimate activity calories from body weight, duration, and metabolic equivalent (MET), with a time-projection table.
Carbohydrate Calculator
Estimate daily calorie needs and convert a selected carbohydrate share into grams, with a 45–65% reference interval and 130-gram adult comparison.
Fat Intake Calculator
Estimate daily fat grams from total energy needs, show a 20–35% reference interval, and calculate a less-than-10% saturated-fat comparison.
Macro Calculator
Estimate a goal-adjusted calorie target and translate a balanced, high-protein, lower-carb, very-low-carb, or custom split into daily grams.
Protein Calculator
Estimate a weight-based daily protein range for general adult, older-adult, endurance, strength, calorie-deficit, or pregnancy contexts.
TDEE Calculator
Estimate basal metabolic rate and total daily energy expenditure with multiple BMR equations and six activity levels.
Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
Weight Watcher Points Calculator
Calculate an unofficial nutrient-based points estimate for educational comparison.
Frequently asked questions
How do I choose a tool from Nutrition — Health and fitness?
Start with the quantity you need to solve for, then compare the required inputs and assumptions before entering values.
Are results in Nutrition — Health and fitness guaranteed?
No. Read the formula, limitations and reference information on the individual calculator. Entered example rates are not current offers or professional advice.
Can I save a calculation from Nutrition — Health and fitness?
The calculator pages support browser-local project and share controls. Shared links and exported files may contain your inputs.