Daily Protein Intake by Body Weight: How Much Do You Need?

Your daily protein intake by body weight can be estimated fairly easily once you know your weight and your main goal. Protein requirements are not identical for everyone: an inactive adult, a regular gym-goer and someone training intensely may all need different amounts.

For healthy adults, the UK reference nutrient intake is approximately 0.75g of protein per kilogram of body weight per day. People who exercise regularly may require a higher intake, particularly when supporting muscle growth and recovery.

Daily Protein Intake by Body Weight Chart

A simple way to estimate your baseline protein requirement is:

Body weight (kg) × 0.75g = daily protein requirement

These figures represent a general UK reference value rather than a personalised target. Individual requirements can be different depending on age, activity, health and nutritional goals.

Protein Intake Per Kg Body Weight for Different Goals

The amount of protein you need can change considerably when your lifestyle or goal changes.

The British Dietetic Association gives approximately 1.4–2.0g/kg/day for athletes involved in strength and endurance sports. It also cites around 1.6–1.7g/kg/day when muscle gain is the specific goal, alongside suitable resistance training and adequate energy intake.

That does not mean everyone who goes to the gym needs 2g/kg of protein. Your training volume and overall diet matter.

How to Calculate Your Daily Protein Requirement

The calculation is straightforward:

Weight in kilograms × protein target = daily protein target

For example, a 75kg adult using the UK reference value:

75 × 0.75 = 56.25g

Someone weighing 75kg and regularly training might use a higher target. At 1.6g/kg:

75 × 1.6 = 120g

Think of these calculations as starting points rather than numbers you have to hit perfectly every day.

Protein Intake for Muscle Gain

If your goal is building muscle, protein is only one part of the equation.

Resistance training provides the stimulus for muscle adaptation, while adequate nutrition and recovery help support the process. The BDA’s guidance places muscle-gain protein intake at roughly 1.6–1.7g/kg/day for suitable training situations.

For example:

• 60kg → approximately 96–102g
• 70kg → approximately 112–119g
• 80kg → approximately 128–136g
• 90kg → approximately 144–153g

Eating more protein does not automatically produce more muscle. Training consistently, eating enough overall and getting adequate sleep are also important.

Protein Intake for Weight Loss

Protein can be useful during weight loss because protein-rich foods can help create satisfying meals. Maintaining adequate protein may also be useful when trying to preserve lean tissue while reducing calorie intake.

However, protein alone does not cause fat loss.

A weight-loss diet still needs an appropriate overall calorie intake and should contain vegetables, fruit, wholegrains, healthy fats and other essential nutrients.

Rather than relying entirely on shakes or protein bars, build meals around foods such as:

• Eggs
• Fish
• Chicken
• Yoghurt
• Tofu
• Lentils
• Chickpeas
• Beans
• Milk
• Nuts and seeds

A Simple Daily Protein Workflow

Use this five-step approach:

1. Weigh yourself: Record your body weight in kilograms.

2. Choose your goal: General nutrition, regular exercise, muscle gain or another objective.

3. Select a suitable protein range: Use the figures above as a starting point.

4. Calculate your target: Multiply body weight by grams of protein per kilogram.

5. Divide it across the day: Include a protein source with breakfast, lunch, dinner and, if useful, a snack.

For example, someone targeting 100g could roughly organise their day around 25g at breakfast, 30g at lunch, 15g in a snack and 30g at dinner.

There is no need for every meal to contain exactly the same amount.

Common Mistakes to Avoid

One common mistake is assuming that more protein is always better. Once your needs are covered, simply adding more does not guarantee better results.

Another is ignoring the rest of the diet. A high-protein diet can still be low in fibre, fruit and vegetables.

It is also easy to rely too heavily on protein supplements. Protein powder can be convenient, but ordinary foods can provide plenty of protein for many people.

Finally, avoid copying another person’s protein target without considering your own weight, activity level and goals.

When Should You Get Personalised Advice?

The calculations in this guide are intended for generally healthy adults. People with kidney disease, other medical conditions affecting nutrition, pregnancy-related nutritional needs, significant illness or highly restrictive diets may need individual advice.

A registered dietitian can calculate an appropriate target based on your circumstances rather than relying on a general formula.

FAQ

What is the daily protein intake by body weight?

For healthy adults, the UK reference nutrient intake is approximately 0.75g of protein per kilogram of body weight per day. People who exercise regularly may require more.

How much protein should I eat per kg of body weight?

For general adult nutrition, around 0.75g/kg/day is the UK reference value. For regular strength or endurance training, requirements can be considerably higher.

How much protein does a 70kg person need?

Using the UK reference value, a 70kg person needs approximately 53g of protein per day. Someone training regularly may need a higher amount depending on their goals.

Is 2g of protein per kg too much?

Not necessarily for a healthy person undertaking substantial training, but it is more than the general adult reference value. Higher intakes are not automatically beneficial, and people with medical conditions should seek personalised advice.

Conclusion

Your daily protein intake by body weight provides a useful starting point for planning your diet. For general adult nutrition, the UK reference value is about 0.75g/kg/day, while regular exercisers may need considerably more.

Calculate your target from your body weight, adjust it for your activity and goals, and focus on a balanced diet rather than chasing the highest possible protein number. Consistency matters more than hitting an exact figure every single day.