Protein Calculator

Protein is a nutrient that the body needs to build and repair muscle, skin, hair, enzymes and hormones. Not getting enough can lead to muscle wasting, slower recovery and feelings of hunger. Getting enough promotes training success and makes it easier to stick to an eating plan.

This calculator will calculate your daily protein target (in grams) based on your weight, training status and goals. It also breaks down the target into meals and shows a healthy range for your height so you know not only what to aim for but how much leeway there is.

How much protein do you need?

To determine protein intake it is most practical to calculate based on weight in kilograms. The official minimum is 0.8g/kg which represents the recommended dietary allowance. This is the minimum amount required to avoid deficiency and not the amount required for an optimal state.

For individuals who are training, more protein is required. Generally the appropriate range for fitness is about 1.2g/kg, while for intense training or muscle building and during a diet it is recommended to be up to about 2.0g/kg. There is little evidence that consuming more than about 2.0-2.2g/kg further enhances muscle growth.

Here's how to set your targets with this calculator.

First a reference amount in grams per kilogram of body weight is set based on activity level and then it's tweaked slightly depending on the goal. In older people a slightly higher protein intake can be helpful to support muscle building so there are slight tweaks for that. Men have more muscle mass on average, so their numbers are adjusted accordingly.

The end result is a reasonable range of 1.0 to 2.0 g/kg and it's designed so that extreme values are avoided by individual settings. When the "Fat Free Mass" option is enabled, target values will be calculated based on fat free body mass. This is suitable for people who know their body fat percentage and have a low body fat percentage and sufficient training.

Calculating protein based on weight:

If you want to check the values directly, here is a rough guide of target amounts for different levels based on weight. Select the row that is closest to your weight and the column that matches your training situation.

Calculation of protein quantity according to age (recommended daily dose):

The recommended daily allowance is also listed directly in grams per day, based on age, which is useful for children and adolescents who are growing. These values are the minimum required to maintain health and do not represent target amounts for athletes.

Distribute protein across daily meals.

The total amount of protein you consume is most important but the timing also plays a role. The body can only utilize about 20 to 40 grams of protein per meal for optimal muscle building purposes. So it's more effective to spread your protein intake over three or four meals rather than eating all at once with dinner.

The amount of protein per meal shown in the results is calculated by dividing your target by the number of meals you've set. If this exceeds 40g then an additional meal or snack can be added to spread out protein intake more efficiently.

Calculated by percentage of calories.

Protein intake is also given as a percentage of total calorie intake, typically between 10 and 35 percent of your daily calories. As protein contains 4 calories per gram, these values can be converted into each other. This tool will also show you the total number of calories that corresponds to your target value.

The protein intake by percentage method is useful for overall nutritional planning but allows a very wide range of values. It's more direct and preferred by many trainers to set your protein goal based on your body weight in kilograms.

High protein foods.

Animal foods such as eggs, poultry, fish, dairy products and red meat are considered complete protein sources. This means they contain all nine essential amino acids that the body cannot make on its own. Eating these foods can easily meet your daily protein needs, but you should not rely solely on fatty cuts of red meat.

You can also meet your needs with plant-based foods. Soybeans, quinoa and buckwheat are naturally complete proteins. By combining legumes and grains or by eating lentils, tofu, nuts and seeds in a variety of ways throughout the day you can also get a complete amino acid profile.

Special circumstances.

Pregnancy and lactation.

During pregnancy and lactation protein requirements increase, with an additional 10 to 30 grams per day in the later stages of pregnancy. If you are pregnant or breastfeeding use this calculator as a rough guide and follow your doctor's or midwife's advice.

Older adults:

After the age of 60 it becomes more difficult to maintain muscle mass. A slight increase in protein intake and strength training can help slow down muscle loss. Many experts recommend a daily protein intake of 1.0-1.2 g/kg body weight for healthy older people. This is also why this calculator shows age-dependent targets.

Kidney diseases:

In cases of compromised kidney function, high protein intake can cause problems and doctors may intentionally set the recommended values lower. In such cases you should not rely on results from a general calculator but use the values given to you by your medical team.

This calculator is for informational purposes only and does not constitute medical or nutritional advice. Protein requirements vary based on health status, training situation, and body composition, and the estimated results are no substitute for a qualified professional's judgment. Always consult with your doctor or nutritionist before making major adjustments, especially if you're pregnant, elderly, or have kidney or liver disease.