Protein Intake Calculator
Calculate your daily protein requirements based on your weight, activity level, and goals.
Your Protein Requirements
Your Optimal Range
What This Means for You
About Protein Requirements
Protein is an essential macronutrient that plays a crucial role in building and repairing tissues, producing enzymes and hormones, and supporting immune function. The amount of protein you need depends on several factors including your body weight, activity level, age, and health goals.
UK Protein Guidelines
According to the UK Department of Health, the Reference Nutrient Intake (RNI) for protein is 0.75g per kilogram of body weight per day for adults. This translates to approximately 45g daily for women and 55.5g daily for men. However, these baseline recommendations may not be optimal for everyone, particularly those who are physically active or have specific health goals.
Factors Affecting Protein Needs
Physical Activity
Regular exercise increases protein requirements. Those engaging in moderate activity may need 1.2-1.4g per kg, whilst athletes and those doing intense strength training may require 1.6-2.2g per kg of body weight.
Age
Older adults (65+) may benefit from higher protein intake, around 1.2g per kg, to help prevent age-related muscle loss and maintain muscle protein synthesis.
Health Goals
Weight loss goals may require higher protein intake (1.6-2.0g per kg) to preserve muscle mass whilst in a calorie deficit. Muscle gain typically requires 1.6-2.2g per kg combined with resistance training.
Overall Health
Protein supports wound healing, immune function, and metabolic health. Adequate intake helps maintain lean body mass and supports healthy ageing.
High-Protein Food Sources
Meeting your daily protein target is easier when you know which foods are rich in protein. Here are common protein sources available in the UK:
| Food Source | Serving Size | Protein Content |
|---|---|---|
| Chicken Breast (cooked) | 100g | 31g |
| Salmon (cooked) | 100g | 25g |
| Eggs (large) | 2 eggs | 13g |
| Greek Yoghurt | 170g pot | 15-20g |
| Cheddar Cheese | 30g | 7g |
| Lean Beef Mince (cooked) | 100g | 26g |
| Lentils (cooked) | 100g | 9g |
| Chickpeas (cooked) | 100g | 9g |
| Tofu (firm) | 100g | 12g |
| Almonds | 30g | 6g |
| Oats (dry) | 40g | 5g |
| Whey Protein Powder | 30g scoop | 20-25g |
Plant-Based Protein Options
Vegetarians and vegans can meet their protein needs through a variety of plant sources. Combining different plant proteins throughout the day helps provide all essential amino acids. Good options include legumes (beans, lentils, peas), soya products (tofu, tempeh, edamame), nuts, seeds, and whole grains like quinoa.
Protein Distribution Throughout the Day
Research suggests that distributing protein intake evenly across meals may be more beneficial than consuming most of it in one sitting. This approach helps optimise muscle protein synthesis throughout the day.
Recommended Distribution
Aim to include 20-30g of protein at each main meal (breakfast, lunch, and dinner). This distribution pattern has been shown to better support muscle maintenance and growth compared to uneven distribution. For example, if your target is 90g of protein daily, you might aim for 25-30g at each meal.
Post-Exercise Protein
Consuming protein within a few hours after resistance training can support muscle recovery and growth. A portion containing 20-30g of high-quality protein is typically recommended post-workout.
Frequently Asked Questions
Can I consume too much protein?
Whilst protein is essential, consuming significantly more than your body needs does not provide additional benefits for most people. Healthy individuals can typically tolerate protein intakes up to 2.5g per kg of body weight without adverse effects. However, those with kidney disease should consult their doctor before increasing protein intake.
Is animal or plant protein better?
Both animal and plant proteins can meet your nutritional needs. Animal proteins are complete proteins containing all essential amino acids, whilst most plant proteins need to be combined to provide the full amino acid profile. The choice depends on personal preference, dietary restrictions, and ethical considerations. A balanced diet can include both sources.
Do I need protein supplements?
Most people can meet their protein needs through whole foods alone. Protein supplements like whey or plant-based powders can be convenient for athletes, those with high requirements, or people who struggle to meet their needs through food. They are a supplement, not a replacement for a balanced diet.
How does protein help with weight loss?
Protein supports weight loss in several ways: it increases satiety (feeling full), has a higher thermic effect (burns more calories during digestion), and helps preserve lean muscle mass during calorie restriction. Higher protein intake (1.6-2.0g per kg) whilst in a calorie deficit can be particularly effective.
Should older adults consume more protein?
Yes, research suggests older adults (65+) may benefit from higher protein intake, around 1.2g per kg of body weight, to help prevent sarcopenia (age-related muscle loss). Distributing protein evenly across meals and including resistance exercise can further support muscle maintenance in older age.
What about protein timing?
Whilst total daily protein intake is most important, timing can play a role for those focused on athletic performance or muscle building. Consuming protein regularly throughout the day (every 3-4 hours) and including it post-exercise may optimise muscle protein synthesis.
Disclaimer: This calculator provides general guidance based on current UK nutritional recommendations. Individual needs may vary. Please consult with a registered dietitian or healthcare professional for personalised nutritional advice, especially if you have any medical conditions.
References
- Department of Health. (1991). Dietary Reference Values for Food Energy and Nutrients for the United Kingdom. Report on Health and Social Subjects No. 41. London: HMSO.
- British Nutrition Foundation. (2023). Nutrition Requirements. Available at: nutrition.org.uk
- Jäger, R., et al. (2017). International Society of Sports Nutrition Position Stand: protein and exercise. Journal of the International Society of Sports Nutrition, 14(20).
- Deutz, N.E., et al. (2014). Protein intake and exercise for optimal muscle function with aging: recommendations from the ESPEN Expert Group. Clinical Nutrition, 33(6), 929-936.
- Morris, S., et al. (2020). Inadequacy of Protein Intake in Older UK Adults. Nutrients, 12(8), 2468.
- British Heart Foundation. (2025). Protein: how much do you need? Available at: bhf.org.uk
- Phillips, S.M. and Van Loon, L.J. (2011). Dietary protein for athletes: from requirements to optimum adaptation. Journal of Sports Sciences, 29(sup1), S29-S38.
- Longland, T.M., et al. (2016). Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss: a randomized trial. American Journal of Clinical Nutrition, 103(3), 738-746.