Weight Loss Calculator By Calories Per Day By Age

Calories Equation:

\[ Calories = (10 \times weight + 6.25 \times height - 5 \times age + gender\_factor) \times activity - 500 \]

Weight:

Height:

Age:

years

Gender:

Activity Level:

Recommended Daily Calories for Weight Loss:

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1. What is the Calories Equation?

The calories equation estimates your daily calorie needs for weight loss based on your weight, height, age, gender, and activity level. It provides a scientifically validated estimate of how many calories you should consume daily to lose weight at a healthy rate.

2. How Does the Calculator Work?

The calculator uses the following equation:

\[ Calories = (10 \times weight + 6.25 \times height - 5 \times age + gender\_factor) \times activity - 500 \]

Where:

\( weight \) — Weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
\( gender\_factor \) — 5 for men, -161 for women
\( activity \) — Activity level multiplier
500 — Calorie deficit for weight loss

Explanation: The equation calculates your Basal Metabolic Rate (BMR), adjusts for activity level, then subtracts 500 calories to create a deficit for weight loss of about 0.5kg per week.

3. Importance of Calorie Calculation

Details: Accurate calorie estimation is crucial for healthy, sustainable weight loss. Consuming too few calories can be harmful, while too many may prevent weight loss.

4. Using the Calculator

Tips: Enter your current weight in kg, height in cm, age in years, select gender and activity level. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: Why subtract 500 calories?
A: A 500-calorie daily deficit typically results in about 0.5kg weight loss per week, which is considered safe and sustainable.

Q2: What if I want faster weight loss?
A: We don't recommend deficits larger than 500-750 calories/day without medical supervision as it can lead to muscle loss and nutritional deficiencies.

Q3: How accurate is this calculation?
A: It provides a good estimate for most people, but individual metabolism can vary by ±15%. Adjust based on your actual results.

Q4: Should I eat back exercise calories?
A: The calculation already accounts for your activity level, so you shouldn't eat additional calories for exercise unless you're very active.

Q5: When should I recalculate my calories?
A: Recalculate every 5-10kg of weight loss, or if your activity level changes significantly.