Diet Calculator: Tools to Lose Weight, Caloric Needs, Macros (Carbs, Fat, Protein) and What to Eat

Tools to Lose Weight

How many calories should you eat to lose weight? Do you wish to slim down? Enhance your health by? Want to improve your performance?

Learn more about your caloric requirements, macronutrient needs (carbohydrates, fat, and protein), what to eat and more based on your goals.

The diet calculator and nutrition plan app below will design simple diets tailored to your body, eating habits, and goals (complete with macros, calories and serving sizes).

The super easy-to-use diet calculator displays your ideal calories depending on your age, height, weight, sex and level of physical activity.

Calculate your calories, servings, and nutrition instantly (for the results you want), helping you accomplish your goals faster than ever before.

BMI Calculator

What is your BMI? The Body Mass Index is a crude estimate of how much body fat a person has. This tool calculates your BMI based upon your recommended body weight.


Body Fat Calculator

Body fat percentage is the proportion of total weight that is fat. The number is calculated by simply dividing the sum of fat pounds (fat mass) by body weight.


One Rep Max Calculator

Find out how strong you are? This calculator provides three formulas that will approximate how much weight you can do one time for an exercise.


Calories Burned Calculator

How many calories are you burning per exercise? Find out here.


Ideal Body Weight Calculator

A simple calculator to determine your ideal body weight based on insurance data.


Target Heart Rate Calculator

What intensity should I be exercising at? This tool calculates your target heart rate and recommends different cardiovascular training zones for you based upon your resting heart rate.


Weight Loss Calorie Calculator

How many calories should you eat to maintain or change your weight? Try this calculator to find out how many calories you need to lose weight!


Protein Intake Calculator

How much protein do you really need? This calculator estimates the correct amount of protein you should consume on a daily basis.


Waist to Hip Ratio Calculator

Your waist to hip ratio will give you a rough indication of your body fat distribution. You can determine your waist to hip ratio by first measuring your waist and your hips. Ideally, a woman's value should be less than .8 and a man's value, less than .95.


Food Fat Calculator

How much fat is in that food? Find the true fat grams and calories in food before eating it.


The Best Meal Plan App

Using the latest science and research, the team at changingshape.com offer plans developed by certified nutrition and fitness professionals that shape exercise and meal plans based on the specific calories and nutrients a body needs to achieve real results. Join the changingshape.com calorie counter app free today.

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