# Calorie Calculator

> Estimate how many calories a day your body uses with the Mifflin-St Jeor equation. For adults age 18 and older. General information only, not medical advice.

Source: https://livingplusrx.com/calorie-calculator/
Publisher: Living+ Rx (livingplusrx.com)
Last updated: 2026-11-09

# Calorie calculator

Estimate how many calories a day your body uses, based on your size, age, and activity. For adults age 18 and older.

Age (18 or older)

Height (ft)

Height (in)

Weight (lb)

Sex (used in the formula)

Female

Male

Activity level

Choose…

Sedentary: little or no exercise

Lightly active: light exercise 1 to 3 days a week

Moderately active: moderate exercise 3 to 5 days a week

Very active: hard exercise 6 to 7 days a week

Extra active: very hard exercise or a physical job

Estimate my calories

## Important information

This calculator is for general educational purposes only. It gives an estimate and is not medical advice, a diagnosis, or a treatment recommendation. It does not determine whether you qualify for any medication or treatment, and using it does not create a patient-provider relationship with Living+ Rx or any provider.

Actual calorie needs vary from person to person, and this estimate is not a diet plan or a calorie target. It is not intended for anyone under 18, anyone who is pregnant or breastfeeding, or anyone who has or is recovering from an eating disorder. If you take medication that affects your appetite, weight, or blood sugar, ask your clinician how much you should eat.

Talk with a licensed health care professional before changing your diet, exercise, or medication. If you think you are having a medical emergency, call 911.

Your entries stay in your browser. They are not saved or sent to Living+ Rx. Formula: Mifflin-St Jeor equation (1990), with commonly used activity multipliers. See our [Terms of Service](https://livingplusrx.com/terms-of-service/).

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