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Cálculo Para Perder Peso

Reviewed by Calculator Editorial Team

Losing weight effectively requires understanding your body's needs and setting realistic goals. This guide explains how to calculate your weight loss requirements and provides a calculator to help you plan your journey.

How to Calculate Weight Loss

Calculating your weight loss needs involves several key factors including your current weight, height, age, gender, and activity level. The most common methods use the Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to determine how many calories you should consume to lose weight.

The Formula

The calculation typically follows these steps:

  1. Calculate your BMR using one of the standard formulas
  2. Adjust for your activity level to get TDEE
  3. Subtract 500 calories for moderate weight loss
  4. Subtract 1000 calories for aggressive weight loss

For women, the BMR formula is often:

BMR = 655 + (9.6 × weight in kg) + (1.8 × height in cm) - (4.7 × age in years)

For men, the formula is:

BMR = 66 + (13.7 × weight in kg) + (5 × height in cm) - (6.8 × age in years)

Once you have your BMR, multiply it by an activity factor to get your TDEE:

  • Sedentary: ×1.2
  • Lightly active: ×1.375
  • Moderately active: ×1.55
  • Very active: ×1.725
  • Extra active: ×1.9

Worked Example

Let's calculate the weight loss needs for a 30-year-old woman who is 165 cm tall, weighs 70 kg, and is moderately active.

  1. Calculate BMR:
    BMR = 655 + (9.6 × 70) + (1.8 × 165) - (4.7 × 30) = 655 + 672 + 297 - 141 = 1483 kcal/day
  2. Calculate TDEE (moderately active):
    TDEE = 1483 × 1.55 = 2291 kcal/day
  3. Calculate weight loss calories:
    Moderate loss: 2291 - 500 = 1791 kcal/day

This woman should consume approximately 1791 calories per day to lose weight at a moderate pace.

Interpreting Results

The calculator provides your daily calorie needs for weight loss. Here's what the numbers mean:

  • BMR: The number of calories your body needs to maintain basic functions at rest
  • TDEE: The total calories burned in a day including activity
  • Weight loss calories: The calories you should consume to lose weight at your chosen pace

Remember that weight loss is not just about calories. Nutrition quality, exercise, and consistency are equally important factors in achieving your goals.

After using the calculator, consider these additional factors:

  • Track your food intake accurately
  • Incorporate strength training to preserve muscle
  • Stay hydrated and get enough sleep
  • Be patient - sustainable weight loss takes time

Frequently Asked Questions

How accurate is this weight loss calculator?

The calculator provides a good estimate based on standard formulas. However, individual results may vary due to factors like metabolism, genetics, and lifestyle habits. Always consult with a healthcare professional for personalized advice.

How quickly can I expect to lose weight?

Weight loss speed varies by individual. Moderate weight loss (0.5-1 kg per week) is generally considered healthy and sustainable. Aggressive weight loss may lead to muscle loss and other health issues.

What's the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest. TDEE (Total Daily Energy Expenditure) includes calories burned through activity and digestion.

Can I lose weight without counting calories?

While calorie counting is effective, you can also lose weight through portion control, mindful eating, and increasing physical activity. Combining these approaches often works best.

What if the calculator shows I need to eat more calories?

If your TDEE is higher than expected, it may mean you're more active than you thought. In this case, you might need to increase your activity level or adjust your calorie intake accordingly.