Calculadora de Taxa Metabólica de Repouso (RMR)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
RMR ≈ 1,1 × TMB
About this calculator
The Resting Metabolic Rate (RMR) Calculator estimates the number of calories your body burns at complete rest, including the basal thermic effect of digestion. Unlike Basal Metabolic Rate (BMR), which measures the minimum caloric expenditure for vital functions, RMR accounts for a small energy increase related to digestion and absorption, being approximately 10% higher than BMR. This tool is useful for diet planning and understanding your metabolism.
RMR is calculated using the Mifflin-St Jeor equation for BMR, multiplied by 1.1. For men, BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (years) + 5; for women, BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (years) - 161. The result is then multiplied by 1.1 to obtain RMR. This approach is widely accepted by nutritionists and health professionals.
When to use this calculator? Ideal for starting a diet plan, adjusting caloric intake for weight loss, gain, or maintenance, and understanding basal energy expenditure. Also useful for athletes and those optimizing nutrition. Remember that RMR is only an estimate; factors like body composition, genetics, and physical activity level affect actual expenditure.
Important considerations: RMR does not account for physical activity or digestion of specific meals. Use the value as an initial reference and adjust based on real results. Consult a nutritionist for personalized recommendations, especially if you have medical conditions such as diabetes or thyroid disorders.
Frequently asked questions
What is the difference between RMR and BMR?
RMR includes the energy cost of basal digestion, being about 10% higher than BMR. BMR measures only vital functions at complete rest.
Is the calculated RMR accurate for everyone?
No, it is an estimate. Factors like muscle mass, genetics, and health conditions can affect the actual value.
Can I use RMR to determine calories for weight loss?
Yes, but subtract a caloric deficit (usually 300-500 kcal) from RMR, also considering physical activity expenditure.
Does the calculator work for children?
The Mifflin-St Jeor equation is validated for adults (18+). For children, consult a pediatrician.
Should I fast before measuring RMR?
RMR is calculated at rest and after a 12-hour fast, but the calculator only uses weight, height, age, and sex data.