Máy Tính Calo

Tính Tỷ lệ Trao đổi Chất Cơ bản (BMR) và Tổng Năng lượng Tiêu thụ Hàng ngày (TDEE) bằng phương trình Mifflin-St Jeor.

Overview

Daily energy requirement is basal metabolic rate multiplied by an activity factor. The Mifflin-St Jeor equation estimates BMR from weight, height, age and sex, and has been the preferred predictive equation since a 2005 systematic review found it more accurate than the older Harris-Benedict formula for people of typical body composition. Multipliers run from 1.2 for sedentary living to about 1.9 for very heavy physical work.

BMR

kcal

TDEE (Calo hàng ngày)

kcal

Giảm cân (-500 kcal)

kcal

Tăng cân (+500 kcal)

kcal

Hệ số mức độ hoạt động

Mức độ Hệ số Mô tả
Ít vận động1.200Công việc văn phòng, không tập thể dục
Nhẹ1.375Tập thể dục nhẹ 1-3 lần/tuần
Vừa phải1.550Tập thể dục vừa phải 3-5 lần/tuần
Hoạt động nhiều1.725Tập thể dục nặng 6-7 lần/tuần
Hoạt động rất nhiều1.900Vận động viên hoặc lao động thể chất

How to Use

  1. 1
    Enter your body details

    Type your age, sex, height, and weight so the calculator can estimate your basal metabolic rate.

  2. 2
    Select your activity level

    Choose how active you are, from sedentary to very active, to apply the right activity multiplier.

  3. 3
    Read your daily calorie needs

    Your maintenance, weight-loss, and weight-gain calorie targets are shown instantly.

About

The activity multiplier dominates the result. Between sedentary and very active, the same basal rate produces figures differing by more than half, which is why self-assessment of activity level is the largest source of error in the estimate. Overstating activity by one band is a common cause of a maintenance target that produces slow weight gain.

Predictive equations carry a standard error of roughly ten percent even when applied correctly, so the calculated figure is a starting point to be adjusted against observed weight change over several weeks rather than a measured requirement.

Frequently Asked Questions

How are daily calorie needs calculated?
Daily calorie needs are calculated using Basal Metabolic Rate (BMR) multiplied by an activity factor. The Mifflin-St Jeor equation is most commonly used: BMR = 10 × weight(kg) + 6.25 × height(cm) – 5 × age – 161 for women (or +5 for men).
What is TDEE and how does it relate to weight loss?
Total Daily Energy Expenditure (TDEE) is your BMR multiplied by your activity level. To lose weight, eat 500 calories below your TDEE for about 1 pound (0.45 kg) of weight loss per week. A deficit greater than 1,000 calories/day is generally not recommended.
How does activity level affect calorie needs?
Activity multipliers range from 1.2 (sedentary) to 1.9 (very active). A sedentary person with a BMR of 1,500 needs about 1,800 calories, while the same person with an active lifestyle may need 2,550 calories. Exercise can add 200–600 calories to daily needs.
Is the Mifflin-St Jeor equation better than Harris-Benedict?
The Mifflin-St Jeor equation (1990) is considered more accurate than the Harris-Benedict equation (1919) for most people, estimating BMR within 10% of actual values. The Harris-Benedict equation tends to overestimate calorie needs by about 5%.

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