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Protein Calculator

Table of contents

What are proteins? – protein definitionHow much protein do I need? – recommended protein intakeDRI – nutrition guidelinesHow to use our daily protein calculator?Foods high in proteinBanana protein shakeProteins and weight lossProtein deficiency – when the hunger kills

This protein calculator or protein intake calculator is an excellent tool for anyone interested in living a healthy lifestyle and eating a balanced diet. With its help, you'll be able to calculate the optimal protein intake for your weight and activity level.

In the further text, we will answer the question, "What are proteins?" and talk about the significance of different types of proteins for our bodies. After that, you will be able to give a few examples of proteins and maybe even tell your friends what the function of proteins present in our blood is.

You will also learn the recommended daily protein intake according to USDA Dietary Guideline. We won't leave you with just the theory, though. A list of foods high in protein and a recipe for a banana protein shake already await you! Finally, we will cover the topic of children from developing countries suffering from chronic protein deficiency.

Naturally, you cannot maintain healthy eating habits on protein alone. Head over to our macronutrients calculator for a comprehensive overview of an ideal diet.

What are proteins? – protein definition

Proteins, just like carbohydrates and fats, are macronutrients – substances used by organisms to produce energy and sustain basic bodily functions. Being organisms, proteins are essential to our existence. Different types of proteins build our muscles and regulate our hormones and metabolism. Some of them are globulins called antibodies – without proteins, our immune system wouldn't work.

💡 Learn more about fats and carbohydrates with our fat intake calculator and carbohydrate calculator.

There is also another group of proteins, albumins. These globular proteins are found in our blood and travel through our body's blood vessels. Albumins serve many roles. They transport various substances that need to get to every part of our body: cations (Na⁺, K⁺, Ca²⁺, Mg²⁺), fatty acids, bilirubin, hormones (including thyroxine), and some pharmaceuticals (if administered). It has some serious clinical implications. Clinicians should remember that the serum calcium and magnesium levels can be altered due to hypoalbuminemia – a state of low albumin level in blood serum. Acquired Ca²⁺ and Mg²⁺ levels have to be corrected using special equations.

💡 Both albumins and globulins (e.g. antibodies) can be evaluated using the albumin globulin ratio calculator.

Albumins are also responsible for keeping adequate oncotic blood pressure. It is the force that keeps the blood inside the arteries and veins. When there is a low serum albumin level, the patient may suffer from edemas, where fluids escape the bloodstream, enter the tissues, and stay there. Clinicians use this knowledge to determine the source of ascites (an excess of fluid inside the peritoneal cavity).

If proteins are so essential, where can you find them? Well, there are many different sources of protein. The most popular ones are animal foods, such as meat, fish, and dairy products. However, it is also possible to plan a vegetarian or even a vegan diet with a sufficient amount of protein. Beans and nuts are some examples of non-animal sources. In further paragraphs, we will give you a list of foods high in protein.

When on a vegan or vegetarian diet, it's best to consult a professional dietitian to ensure that you consume sufficient amounts of various macronutrients, including protein.

Now, if your friends ask you: "what is the function of proteins?" you can already elaborate on many topics concerning the proper functioning of our bodies and mention a few examples of proteins. Now it is time to answer the question: "How much protein do I need?".

DRI – nutrition guidelines

If you would like to deepen your knowledge of which nutrients you should eat and what quantity, we encourage you to visit the webpage of the National Institutes of Health. You will find their DRI – nutrition guidelines. The acronym DRI stands for dietary reference index. These indexes consist of many tables presenting data on the recommended supply of any particular nutrient for each sex and age group. We have used them to prepare this table of recommended protein intake:

Life Stage Group

Protein (g/d)

0–6 mo


6–12 mo


1–3 y


4–8 y


9–13 y



14–18 y


18 y



13 y


Pregnancy and lactation


How to use our daily protein calculator?

This is an instruction on how to use our daily protein calculator:

  1. Select your sex – choose between male and female.
  2. Type in your height. Please note that you can choose from a variety of units of length; just click on the default – in or cm.
  3. Measure and type in your weight – here, you can also choose the unit of weight.
  4. Type in your age.
  5. Select your activity level throughout the week.
  6. Choose the type of recommendations you want to see: general USDA protein intake recommendation or recommendations for protein intake in sports.
  7. That’s it! Your suggested daily protein intake will appear. You didn't have to perform complex calculations or look through large nutritional tables. Our daily protein calculator did it all for you!

Foods high in protein

You already know how much protein per day you should eat to preserve your well-being, but do you know what you can eat to supply proteins effectively? Do you know any foods high in protein? Don't worry. We have prepared a list of foods high in protein, especially for you:

  • Meat: beef, pork, lamb, turkey, and chicken breasts;
  • Fish: tuna, halibut, and salmon;
  • Eggs;
  • Dairy products: milk, cottage cheese, and yogurt;
  • Nuts and seeds: hemp seeds, almonds, pumpkin seeds, pistachios, chia seeds, and nut butter;
  • Plants and corns: black beans, lima beans, yellow corn, potatoes, broccoli, cauliflower, cabbage, oats, legumes, sun-dried tomatoes, guava, artichokes, peas, chickpeas, quinoa, lentils, avocado, and asparagus;
  • Spirulina – biomass produced by cyanobacteria – blue-green algae;
  • Whey protein powder – used as a supplement by heavy lifters and athletes wanting to build muscle mass. In the next paragraph, we will give you a recipe for a banana protein shake!

Have you ever wondered how many calories you should eat with every particular meal throughout the day? Now you can calculate it yourself with our meal calorie calculator!

Banana protein shake

Many athletes and bodybuilders help themselves gain muscle weight by supplementing their diet with whey protein powder. However, not so many of them like the taste of protein powder simply dissolved in water or milk. If it also applies to you, don't worry! We have prepared a recipe for a delicious banana protein shake! The bananas and peanut butter included in the recipe will alter the taste of the protein shake, thus making it easier to consume. And even if you like whey protein powder by itself, it is nice to have a little change once in a while, isn't it?

image of delicious banana shake

Banana protein shake recipe:

  1. Prepare:
    • 1 cup of milk – low-fat, almond or any other – it's your call!
    • 1 banana, cut into small pieces;
    • 3 tablespoons peanut butter;
    • 1/3 teaspoon of vanilla extract;
    • 1 scoop of whey protein powder – preferably vanilla flavor;
    • Some ice cubes if you like your protein shake frozen.
  2. Add all ingredients to the blender or your hand blender bowl.
  3. Blend until it's smooth – you can check it by tasting it with a teaspoon.
  4. It's ready. Bon appetite! I hope you like it!

Proteins and weight loss

If you're trying to lose weight, you must keep your protein intake at a level recommended by this protein calculator. A decrease in protein consumption can have a detrimental effect on your health.

The reason behind it is pretty simple. When we reach a calorie deficit, our bodies don't automatically start burning the accumulated fat (even though we would wish for it). First, it uses the available carbohydrates and proteins. Only then does it turn to fat storage for energy.

Accessing the fat storage is not easy, though – it requires some energy, usually obtained from breaking down carbohydrates. If these are unavailable, your organism will break down lean body tissues (your muscles) for proteins that can be converted into carbs.

What does it mean? It means that if you try a starvation diet, instead of losing fat, you will lose muscle mass. That's why medical professionals often recommend that you eat small portions of protein a few times throughout the day – so that your cells will not have to turn to their own tissues as an energy source.

Protein deficiency – when the hunger kills

We would like to end this text by addressing a grave tragedy affecting an unbelievable amount of people around the world – protein-energy malnutrition. It is caused by chronic hunger or disease, reducing the ability of the intestines to absorb food. As you may suspect, it concerns mainly developing countries. However, children and the elderly of America experience malnutrition and protein deficiency too. This illness manifests in two disorders: marasmus, a state of inadequate supply of both proteins as well as calories, and kwashiorkor in which enough calories are consumed but with a protein deficiency. Emaciation is the most characteristic feature of marasmus, while edemas are typical for kwashiorkor (go back to the "What are proteins? – protein definition" paragraph to learn why).

Both malnutrition and protein deficiency cause changes in practically every part of the human body (as it affects various types of proteins in different organs):

  • Loss of muscle and fat mass;
  • Dry, thin, atrophic skin with pigmentation alterations;
  • Depigmentation and loss of hair;
  • Fatty and an enlarged liver (hepatomegaly) with reduced protein production;
  • Protuberant abdomen;
  • Problems with digestion;
  • Bradycardia (slow heartbeat) and decreased stroke volume;
  • A decrease in vital capacity, tidal volume, and minute ventilation of lungs;
  • Malfunction of kidneys: decreased glomerular filtration rate;
  • Anemia, leukopenia, and lymphocytopenia (a decrease in the amount of red, white cells, and lymphocytes);
  • Weak immune system;
  • Hormone disturbances;
  • Death – around 5,000,000 deaths of young children in developing countries occur each year because of malnutrition.

We, the people of the 21st century, hear about discoveries or inventions on a daily basis. We are proud of our technological advancement, open-mindedness, and humane way of thinking. However, we still let such tragedies happen in front of our eyes. Perhaps society should be judged on how it treats its weakest members. What do you think?

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