From BMR to daily calories
Daily need ≈ Mifflin–St Jeor BMR × activity factor × goal adjustmentThe activity factor is usually the least certain input, so a cautious selection and observation of the real weight trend are important.
← All calculators
FAMILY, CHILDREN AND HEALTH
Calorie and macronutrient needs
Calories, protein, fat and carbohydrates
CalcuPop…
A CLEANER SITE, WITH YOUR HELP
Was it useful? Support CalcuPop.
Even a small voluntary contribution helps us keep these calculators free, clear and free from aggressive advertising.
Who’s behind CalcuPopSupport CalcuPopCard via Stripe or PayPalStripe or PayPal handles your payment. CalcuPop never sees or stores your card details.
Share this calculator
Send the calculator, or prepare a controlled snapshot of the result.
DOES THE RESULT LOOK WRONG?
Help us improve this calculator.
HOW IT WORKS
A result to understand, not just read.
The estimate starts with Mifflin–St Jeor resting metabolism, applies an activity factor and then adjusts for the selected maintenance, gradual loss or gradual gain goal.
OFFICIAL SOURCES
pubmed.ncbi.nlm.nih.gov↗FREQUENTLY ASKED QUESTIONS
Why can actual calorie needs differ?+
Activity estimates, body composition, medication, health conditions and unrecorded movement can all change real energy expenditure.
Is the macro split a personalised diet?+
No. It is an organisational estimate and not a meal plan or clinical nutrition prescription.
RESULT GUIDE
How maintenance calories and macros are estimated
Resting energy is multiplied by an activity factor and goal adjustment. Protein is set from the selected grams per kilogram, fat receives 30% of calories and carbohydrate uses the remainder.
Example using the calculator defaults
- man, age 40, 75 kg, 175 cm
- light activity: factor 1.375
- goal: maintain weight
A weight trend observed over several weeks is more useful than a single theoretical result when refining the estimate.
How to interpret the result
- BMR is estimated energy at rest, not a normal full-day food target.
- The macro figures are a practical starting point rather than a medical diet.
What the estimate does not include
- Not intended for minors, pregnancy, breastfeeding, eating disorders or clinical nutrition goals.
- Large calorie deficits or therapeutic plans require a qualified health professional.
A CLEANER SITE, WITH YOUR HELP
Was it useful? Support CalcuPop.
We try to avoid intrusive banners, autoplay videos, aggressive advertising links and misleading patterns. If this service helped you, you can support it with a voluntary contribution that helps cover its costs, improve it and keep it available to everyone.
Who’s behind CalcuPopSupport CalcuPopCard via Stripe or PayPalStripe or PayPal handles your payment. CalcuPop never sees or stores your card details.