Weight Loss Calculator By Age

Weight Loss Formula:

\[ Calories = Adjusted\ BMR\ by\ Age - Deficit \]

Age:

years

Gender:

Weight:

Height:

Activity Level:

Calorie Deficit:

kcal/day

BMR:

Adjusted BMR by Age:

Deficit:

Calories:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Weight Loss Calculator By Age?

The Weight Loss Calculator By Age estimates your daily calorie needs for weight loss based on your age, gender, weight, height, activity level, and desired calorie deficit. It calculates your Basal Metabolic Rate (BMR) and adjusts it for activity level to determine your maintenance calories, then subtracts your desired deficit to determine your weight loss calorie target.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation for BMR:

\[ BMR = 10 \times weight(kg) + 6.25 \times height(cm) - 5 \times age(years) + 5 \ (for\ men) \] \[ BMR = 10 \times weight(kg) + 6.25 \times height(cm) - 5 \times age(years) - 161 \ (for\ women) \]

Then applies activity multipliers:

Sedentary (little or no exercise): BMR × 1.2
Lightly active (light exercise 1-3 days/week): BMR × 1.375
Moderately active (moderate exercise 3-5 days/week): BMR × 1.55
Very active (hard exercise 6-7 days a week): BMR × 1.725
Extra active (very hard exercise & physical job): BMR × 1.9

Finally, subtracts your desired calorie deficit to determine your daily calorie target for weight loss.

3. Importance of Calorie Calculation

Details: Accurate calorie calculation is crucial for effective weight management. Understanding your maintenance calories helps create an appropriate deficit for sustainable weight loss without compromising health or metabolism.

4. Using the Calculator

Tips: Enter your age in years, select gender, enter weight in kg, height in cm, select your activity level, and specify your desired calorie deficit. A deficit of 500 kcal/day typically results in about 0.5kg weight loss per week.

5. Frequently Asked Questions (FAQ)

Q1: Why does age affect calorie needs?
A: Metabolism naturally slows with age due to loss of muscle mass and hormonal changes, requiring fewer calories to maintain the same weight.

Q2: What's a safe calorie deficit for weight loss?
A: A deficit of 500-1000 calories per day is generally safe, resulting in 0.5-1kg weight loss per week. Very low calorie diets should be medically supervised.

Q3: Should I adjust my calories as I lose weight?
A: Yes, as you lose weight, your BMR decreases, so you may need to recalculate your calorie needs periodically for continued progress.

Q4: Are there limitations to this calculation?
A: This provides an estimate. Individual variations in metabolism, medical conditions, medications, and body composition can affect actual calorie needs.

Q5: How accurate is the activity level multiplier?
A: Activity multipliers are estimates. For more precision, consider using a fitness tracker to measure actual calorie expenditure.