Health & Fitness Tools
Calorie Calculator
Estimate maintenance calories using BMR and activity multiplier assumptions.
Evidence-aware calculator
Use an explicit activity factor instead of a hidden calorie prescription
Inputs are explicit, assumptions are disclosed, and health-related outputs are framed as screening or planning estimates rather than diagnoses or prescriptions.
Result
1,911 kcal/day
Estimated REE
1,593 kcal/day
User-selected activity factor
1.20
Planning expenditure estimate
1,911 kcal/day
The activity factor is entered by you; ViralLabs.ai does not prescribe a calorie target or activity multiplier. The result is REE × your selected factor and is a planning estimate, not nutrition or weight-loss advice.
REE reference: Mifflin et al., 1990. Activity factor: user-selected planning input, not an official recommendation.