How the Calorie Calculator works.
TDEE = BMR × activity factorCalorie Calculator example using the starting values.
This Calorie Calculator example uses the starting inputs: Weight (kg): 70, Height (cm): 175, Age: 30, Sex: male, Activity factor: 1.55.
Result: 2556 kcal/day
Estimated maintenance energy, not a prescription.
BMR: 1649 kcal/day
What the result means
Estimate Mifflin–St Jeor needs with activity. The Calorie Calculator result describes only the measurements and method shown; it is not a diagnosis or an individualized target.
Enter a consistent scenario
Use Calorie Calculator with values from one clearly defined scenario. The visible inputs are weight (kg), height (cm), age, sex, activity factor. Daily energy is estimated by multiplying Mifflin–St Jeor resting energy by the selected activity factor. It is not a meal plan and does not account for clinical conditions, pregnancy, medications, or changing training load. Check the unit, period, and meaning of each value before calculating; combining records from different dates can produce a precise-looking but unhelpful answer.
Follow the method
This page applies TDEE = BMR × activity factor. Daily energy is estimated by multiplying Mifflin–St Jeor resting energy by the selected activity factor. It is not a meal plan and does not account for clinical conditions, pregnancy, medications, or changing training load. First identify what each entered value represents, convert a percentage to the form required by the displayed formula, and retain intermediate precision. Then make a rough mental check of direction and size. Estimate Mifflin–St Jeor needs with activity. The worked result is transparent arithmetic rather than an unshown lookup.
Use the result carefully
Read the output as an answer to the narrow question described by the fields, not as a prediction of every real-world outcome. Daily energy is estimated by multiplying Mifflin–St Jeor resting energy by the selected activity factor. It is not a meal plan and does not account for clinical conditions, pregnancy, medications, or changing training load. For Calorie Calculator, compare results only when the measurement basis, time period, currency denomination, or grading convention is the same. This is general information, not a diagnosis, treatment target, or substitute for individual clinical care. Discuss symptoms, pregnancy dating, nutrition, exercise, or a concerning result with a qualified clinician.
Assumptions and boundaries
Before relying on Calorie Calculator, identify what its formula—TDEE = BMR × activity factor—holds constant and what it does not observe. Daily energy is estimated by multiplying Mifflin–St Jeor resting energy by the selected activity factor. It is not a meal plan and does not account for clinical conditions, pregnancy, medications, or changing training load. Its entries (weight (kg), height (cm), age, sex, activity factor) define the full scope of this particular result. Do not turn a rounded display into more certainty than the entered data supports; use the official record or provider documentation where it controls.
Common mistakes and next steps
For Calorie Calculator, begin a review by comparing the displayed weight (kg), height (cm), age, sex, activity factor against the source record. Daily energy is estimated by multiplying Mifflin–St Jeor resting energy by the selected activity factor. It is not a meal plan and does not account for clinical conditions, pregnancy, medications, or changing training load. Typical mistakes are entering a percent as a decimal or vice versa, using an amount from the wrong time period, rounding before the final step, and treating an estimate as an official determination. Record the inputs and result if you need to compare scenarios later.
What the Calorie Calculator does not include.
This Calorie Calculator result is an estimate, not a diagnosis or treatment plan. Seek urgent care for concerning symptoms and discuss pregnancy, diet, sleep, or activity decisions with a qualified clinician.
Official context and guidance.
Calorie Calculator questions.
What does the Calorie Calculator calculate?
Estimate Mifflin–St Jeor needs with activity.
Which inputs does the Calorie Calculator use?
It uses only the fields shown on this page: TDEE = BMR × activity factor.
How should I use my Calorie Calculator result?
Use the Calorie Calculator result as a planning estimate, not a diagnosis or treatment recommendation. Discuss symptoms, pregnancy care, or changes to diet, sleep, or activity with a qualified clinician.
Why might another Calorie Calculator result differ?
Another Calorie Calculator may use a different method, input scope, or rounding convention than TDEE = BMR × activity factor.