Weight Loss Calculator

Want to lose weight and keep it off for good? Well, the first step is to success is understanding how many calories your body is using.

Once you know that, you can make a decision about how many calories you should be cutting or burning to lose weight.

To get started, enter your details below (bodyfat % is optional) and hit calculate to get your results.

Enter Your Details Below


Basal Metabolic Rate

Total Daily Energy Expenditure








Weight Class

1. What is my BMR?

BMR stands for Basal Metabolic Rate. In a nutshell, this is the number of calories your body would burn if you spent the day completely motionless (We’ve all had days like that!). 

Knowing your BMR helps you figure out how many calories your body burns each day to exist, and it’s the most important starting place for losing weight.

Your BMR also gives you a good indication of your current metabolism. However,  that’s only one part of the great weight loss puzzle. The next step is to understand your TDEE.

2. What is my TDEE?

Your Total Daily Energy Expenditure (TDEE) is your BMR, plus the total number of calories you burn off each day during regular activity (such as walking around the house) and exercise.

Knowing your TDEE is essential because it reveals how many calories you need to consume to sustain your daily activity levels and maintain your current weight.

No weight loss program should begin without knowing your TDEE. Without that number, you have no way to tell if your weight loss efforts are going to work.

3. What is my BMI?

Your Body Mass Index (BMI) is used to work out if your weight is healthy for your height.

Knowing your BMI can help you (and your health practitioner) determine any health risks you may face if your BMI is outside of the healthy range.

Just be aware that your BMI won’t take your age, gender, ethnicity, or muscle mass into consideration. So it’s not always appropriate for determining a healthy weight in the elderly, children, pregnant women or athletes.

4. What is my BMI class?

Your BMI can be used to classify where you sit on a BMI scale. Your BMI class can then be used to predict your risk of developing weight-related diseases such as diabetes.

  • Underweight = < 18.5 
  • Normal Weight = 18.5–25 
  • Overweight = 25.0–30 
  • Class 1 Obesity = 30.0–35  
  • Class 2 Obesity = 35–40
  • Class 3 Obesity = > 40.0 

5. So how do I lose weight?

Well, did you know that 1 pound of fat contains 3500 calories?

So if you want to lose 1 pound of fat per week, you’d need to consume 500 fewer calories than your TDEE or increase your activity levels to burn off an additional 500 calories (or a combination of both).

Knowing this also helps you to predict how long it will take you to lose weight. For example, if you want to lose 10 pounds and you consume 500 fewer calories per day, it will take you 10 weeks to drop the weight.

6. Want to make weight loss easier?

Cutting 500 calories a day may sound simple enough. But in practice, 500 calories is the equivalent to a whole meal!

This is why so many people fail on their diets because they make drastic changes, such as cutting out entire meals and go to bed hungry.

Trimtone helps you to gradually cut calories throughout the day by reducing your appetite and controlling your hunger — resulting in effortless weight loss that actually lasts.

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