1. What is the Daily Calories Calculation?

The daily calories calculation estimates how many calories a woman needs each day to maintain her current weight based on her basal metabolic rate (BMR) and activity level.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( BMR \) — Basal Metabolic Rate (kcal/day)
• \( activity\_factor \) — Multiplier based on activity level (dimensionless)

BMR Calculation (Mifflin-St Jeor Equation for Women):
\[ BMR = (10 \times weight\ in\ kg) + (6.25 \times height\ in\ cm) - (5 \times age\ in\ years) - 161 \]

Activity Factors:

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

3. Importance of Calorie Calculation

Details: Knowing your daily calorie needs helps with weight management, whether your goal is to maintain, lose, or gain weight.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this calculator only for women?
A: Yes, this calculator uses the Mifflin-St Jeor equation specifically for women. Men should use a different BMR calculation.

Q2: How accurate is this calculation?
A: It provides a good estimate but individual variations in metabolism may mean your actual needs differ by ±200 kcal.

Q3: Should I eat fewer calories to lose weight?
A: For weight loss, a deficit of 300-500 kcal/day is typically recommended, but consult a healthcare professional.

Q4: Does this account for pregnancy?
A: No, pregnant women have different calorie needs and should consult their doctor.

Q5: How often should I recalculate my needs?
A: Recalculate if your weight changes significantly (±5 kg) or your activity level changes substantially.