NomiDaily calorie needs vary. A practical starting estimate uses resting energy expenditure and an activity factor, then compares that estimate with real trends. Medical conditions, pregnancy, growth and eating-disorder history need individualized professional care.
There is no universal calorie number
Two people can have different energy needs at the same body weight because height, age, sex, body composition, movement and physiology differ. A calculator is a starting hypothesis. It is not a metabolic measurement and cannot know how much you move outside formal exercise.
Maintenance calories describe an intake that may keep body weight broadly stable over time. Daily scale changes include water, glycogen, digestion and hormones, so several weeks tell you more than one morning.
How an estimate is built
The Mifflin-St Jeor equation estimates resting energy expenditure from weight, height, age and sex. An activity multiplier then estimates total daily energy expenditure. The calculation is widely used, but every multiplier compresses a complex week into one category.
Choose activity conservatively. A desk job with three workouts may still include many sedentary hours. Start with the estimate, keep intake and routine reasonably consistent, and compare average weight over time before making a small adjustment.
Maintenance, deficit and surplus
Eating below actual energy expenditure creates a deficit; eating above it creates a surplus. The size and result are not perfectly linear. As body weight and behavior change, expenditure can change too. Aggressive targets can make hunger, fatigue and adherence worse.
A modest adjustment is easier to evaluate. Keep protein, fiber and food quality in view rather than treating calories as the only nutritional concern. Athletes, older adults and people with health conditions may need specialized targets.
Use the calculator as a starting point
Nomi’s maintenance calculator runs entirely in the browser. It shows estimated BMR and TDEE in metric or imperial units, explains the formula and links to primary sources. Nothing you enter is saved or sent.
After calculating, you can use Nomi to log food and compare the estimate with real patterns. Avoid changing the target in response to a few noisy days. A trend and how you feel are both relevant.
When to seek individual advice
Do not rely on a general calculator for pregnancy, breastfeeding, childhood, an eating disorder, significant illness, medication-related weight change or a therapeutic diet. A doctor or registered dietitian can account for information a public form cannot.
If calorie tracking increases fear, guilt or compulsive behavior, stop and seek support. Health is broader than a target number, and an app should serve your wellbeing rather than control it.
Medical disclaimer
This article is general education, not medical advice, diagnosis or treatment. Nutrition estimates and calculators cannot account for every person. Talk to a doctor or registered dietitian before a major dietary change or when a health condition is involved.