TDEE Calculator Free
Estimate your Total Daily Energy Expenditure (TDEE), Basal Metabolic Rate (BMR), and custom daily hydration targets with our interactive trackers.
Estimate BMR and daily energy needs from an activity multiplier. Hydration tracking remains available in the other tab.
Health disclaimer: TDEE uses the Mifflin-St Jeor equation plus activity multipliers, and hydration uses a practical ml/kg rule with exercise and climate adjustments. Results are educational estimates, not medical nutrition therapy.
Personal Daily Summary
Activity Tiers Breakdown
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the energy your body expends just to survive in a resting state. TDEE (Total Daily Energy Expenditure) accounts for both your BMR and your daily physical activities.
How does dehydration affect metabolism?
Even mild dehydration (losing 1-2% of body weight) can reduce physical performance, impair focus, and slow metabolic functions. Drinking enough water supports digestive processes and energy levels.
Which BMR formula is used?
The calculator uses the widely used Mifflin-St Jeor equation to estimate resting metabolic rate. It is a population-based estimate and may differ from measured energy expenditure.