Noom Calorie Calculator

Your personalized tool for understanding daily energy needs, inspired by Noom’s psychology-based approach to weight management.

What is a Noom Calorie Calculator?

A noom calorie calculator is a specialized tool designed to estimate your Total Daily Energy Expenditure (TDEE) — the number of calories your body burns in a 24-hour period. While Noom itself is a comprehensive app focusing on the psychology of eating, this calculator uses the same underlying principles to give you a baseline for your weight management journey. It considers crucial factors like your age, sex, weight, height, and activity level to provide a personalized calorie target. Understanding this number is the first step in creating a sustainable calorie deficit for weight loss, maintaining your current weight, or planning for healthy weight gain.

The Noom Calorie Calculator Formula and Explanation

This calculator primarily uses the Mifflin-St Jeor equation, widely considered one of the most accurate methods for estimating your Basal Metabolic Rate (BMR). BMR is the energy your body needs to perform basic life-sustaining functions at rest. Once BMR is calculated, it’s multiplied by an activity factor to determine your TDEE (maintenance calories).

BMR Formula (Mifflin-St Jeor):

• For Men: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
• For Women: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161

TDEE Formula: TDEE = BMR × Activity Level Multiplier

Variables Table

Variables used in the calorie calculation

Variable	Meaning	Unit	Typical Range
Weight	Your current body mass	kg or lbs	40 – 150 kg
Height	Your stature	cm or ft/in	140 – 210 cm
Age	Your age in years	Years	18 – 80
Activity Multiplier	A factor representing your daily physical activity	Unitless	1.2 – 1.9

Practical Examples

Example 1: Moderate Weight Loss Goal

Let’s consider a 35-year-old woman who is 165 cm tall, weighs 75 kg, is moderately active, and wants to lose weight.

• Inputs: Age: 35, Sex: Female, Weight: 75 kg, Height: 165 cm, Activity: Moderately Active, Goal: Weight Loss.
• Calculation:
  • BMR = (10 × 75) + (6.25 × 165) – (5 × 35) – 161 = 1445 calories
  • TDEE (Maintenance) = 1445 × 1.55 = 2240 calories
  • Weight Loss Goal = 2240 – 500 = 1740 calories/day
• Result: Her target is approximately 1740 calories per day to lose about 0.5 kg (1 lb) per week.

Example 2: Maintaining Weight with an Active Lifestyle

Now, a 40-year-old man who is 180 cm tall, weighs 80 kg, is very active, and wants to maintain his weight.

• Inputs: Age: 40, Sex: Male, Weight: 80 kg, Height: 180 cm, Activity: Very Active, Goal: Maintain Weight.
• Calculation:
  • BMR = (10 × 80) + (6.25 × 180) – (5 × 40) + 5 = 1730 calories
  • TDEE (Maintenance) = 1730 × 1.725 = 2984 calories
• Result: His target to maintain his current weight is approximately 2984 calories per day. For tips on managing this, he might check out a guide on avoiding a weight loss plateau.

How to Use This Noom Calorie Calculator

1. Select Your Units: Start by choosing between Metric (kg, cm) and Imperial (lbs, inches) units. The labels will update automatically.
2. Enter Your Details: Fill in your sex, age, current weight, and height. Be as accurate as possible for the best results.
3. Choose Your Activity Level: Be honest about your weekly exercise. This factor significantly impacts your TDEE.
4. Set Your Goal: Select whether you want to lose, maintain, or gain weight. The calculator automatically adjusts your final calorie number.
5. Interpret Your Results: The main result is your daily calorie target. You’ll also see your BMR (calories at rest) and TDEE (maintenance calories), which are useful for understanding your metabolism. Check our Noom food list for ideas on what to eat.

Key Factors That Affect Calorie Needs

• Muscle Mass: Muscle burns more calories at rest than fat. People with more muscle mass generally have a higher BMR.
• Age: Metabolic rate naturally slows down with age, typically decreasing by 1-2% per decade after 20.
• Hormones: Hormonal imbalances, such as those related to the thyroid, can significantly increase or decrease your BMR.
• Genetics: Your genes play a role in your baseline metabolic rate.
• Diet: Eating too few calories can slow down your metabolism as your body tries to conserve energy. Explore some healthy recipes to ensure you’re fueled properly.
• Non-Exercise Activity Thermogenesis (NEAT): This includes calories burned from activities that are not formal exercise, like fidgeting, walking to your car, or doing chores. It can vary greatly between individuals.

Frequently Asked Questions (FAQ)

1. How accurate is this noom calorie calculator?

This calculator uses the Mifflin-St Jeor formula, which is considered highly accurate for the general population. However, it’s still an estimate. Individual metabolisms can vary.

2. How many calories should I cut to lose weight?

A deficit of 500 calories per day is generally recommended for a safe and sustainable weight loss of about 1 pound (0.45 kg) per week.

3. Why do I need to choose between metric and imperial units?

The calculation formulas are based on specific units (kg and cm). The unit switcher ensures your input is correctly converted before the calculation, providing an accurate result regardless of the system you use.

4. Can I eat less than my BMR?

It’s generally not recommended to eat fewer calories than your BMR for an extended period without medical supervision. Your BMR represents the minimum energy your body needs for vital functions. For a better understanding of food energy, review a calorie density chart.

5. Why did my friend get a different result with the same stats?

Ensure all inputs are identical, including sex and activity level. A small change in the activity multiplier can lead to a significant difference in the final calorie recommendation.

6. Does this calculator work for teenagers?

This calculator is designed for adults over 18. Teenagers have different energy needs due to growth and development, and should consult a healthcare provider.

7. How does exercise affect my calorie needs?

Exercise increases your TDEE. The more active you are, the more calories you burn, and therefore the more you need to eat to maintain your weight. You can see our guide on the best exercises for weight loss.

8. What if I hit a weight loss plateau?

As you lose weight, your TDEE will decrease. It’s important to recalculate your needs periodically and adjust your calorie intake or activity level accordingly. Sometimes, certain metabolism boosters can help as well.

Related Tools and Internal Resources

Explore more of our tools and resources to help you on your wellness journey:

• Calorie Density Chart: Understand which foods give you the most volume for the fewest calories.
• Weight Loss Plateau Guide: Learn why plateaus happen and how to break through them.
• Noom Food List PDF: A handy guide to Noom’s green, yellow, and red food system.
• Healthy Recipes for Beginners: Simple and nutritious meal ideas to get you started.
• Best Exercises for Weight Loss: Find effective workouts to complement your diet.
• How to Boost Your Metabolism: Tips and tricks to enhance your body’s calorie-burning engine.