Why protein matters
Protein is made of amino acids — the building blocks for muscle, skin, hair, nails, enzymes, hormones and antibodies. Your body cannot store protein the way it stores fat, so you need a steady supply every day. Eating enough protein helps you stay full for longer, protect muscle while losing weight, recover from exercise and stay strong as you age.
The official Recommended Dietary Allowance (RDA) is 0.8 g of protein per kg of body weight — the minimum to prevent deficiency in sedentary adults. Research shows many people benefit from more, especially when losing weight, training or over 65. This protein calculator gives a range that fits your situation.
How the protein calculator works
Daily protein = body weight (kg) × grams of protein per kg for your goal:
| Goal or situation | Protein per kg body weight |
|---|---|
| Healthy, mostly sedentary adult | 0.8 – 1.0 g/kg |
| Active lifestyle | 1.1 – 1.4 g/kg |
| Weight loss (protect muscle) | 1.2 – 1.6 g/kg |
| Muscle gain / strength training | 1.6 – 2.2 g/kg |
| Endurance athletes | 1.2 – 1.6 g/kg |
| Adults over 65 | 1.0 – 1.2 g/kg |
| Pregnancy and breastfeeding | about 1.1 – 1.3 g/kg |
Example: a 70 kg woman who is losing weight needs 70 × 1.2 to 70 × 1.6 = 84–112 g of protein a day — about 28–37 g per meal over three meals. If you have a lot of weight to lose, entering your goal weight gives a more realistic number.
Protein intake levels: low, normal and high
| Protein intake | Level | What it means |
|---|---|---|
| Under 0.8 g/kg a day | Low | Risk of muscle loss, weak immunity, slow healing, hair thinning and swelling (oedema) |
| 0.8 – 1.6 g/kg a day | Normal | Meets needs for most healthy adults; higher end for active people and weight loss |
| 1.6 – 2.2 g/kg a day | Higher (athletes) | Useful for strength training and muscle gain |
| Over 2.2 g/kg a day | Very high | No extra muscle benefit for most; may crowd out fibre-rich foods; not advised with kidney disease |
Benefits of eating enough protein
- Appetite control: protein is the most filling macronutrient and helps reduce cravings.
- Muscle protection: keeps your metabolism higher while you lose weight.
- Stronger bones and healthy ageing: helps prevent sarcopenia (age-related muscle loss).
- Better blood sugar control when protein is paired with carbohydrates.
- Healthy hair, skin and nails, and faster recovery from illness or exercise.
Health warnings
- If you have chronic kidney disease, do not increase protein without your doctor’s or dietitian’s advice.
- Very high protein diets based on red and processed meat may raise heart and bowel cancer risk — mix in fish, poultry, eggs, dairy and legumes.
- Protein powders are supplements, not essentials. Choose tested brands and avoid products with added stimulants.
- Children and teenagers have different needs — ask a paediatric dietitian.
Easy ways to eat more protein
Spread protein over the day: eggs or Greek yoghurt at breakfast, dal or chickpeas with lunch, and chicken, fish or paneer at dinner. Snacks like roasted chana, a handful of almonds or a glass of laban add a few extra grams. Learn more in our guide to the role of protein, and use the macro calculator to balance it with carbs and fat.
Frequently asked questions
How much protein do I need a day?
Most healthy adults need at least 0.8 g per kg of body weight. Active people, those losing weight and adults over 65 often do better with 1.0–1.6 g/kg, and people building muscle with 1.6–2.2 g/kg.
How much protein do I need to lose weight?
Aim for about 1.2–1.6 g of protein per kg of body weight (or goal weight if you are very overweight). This helps you feel full and keep muscle while in a calorie deficit.
How much protein can my body use in one meal?
There is no strict limit, but 20–40 g per meal is a practical target for muscle building. Spreading protein evenly across meals is better than eating most of it at dinner.
Can vegetarians get enough protein?
Yes. Lentils, chickpeas, beans, tofu, paneer, Greek yoghurt, milk, eggs, nuts and seeds all provide protein. Combining different plant proteins through the day gives all essential amino acids.
Is too much protein bad for you?
For healthy people, up to about 2 g/kg is considered safe. Very high intakes are unnecessary and not advised for people with kidney disease.
Sources
- Institute of Medicine. Dietary Reference Intakes for Protein and Amino Acids. 2005.
- Jäger R, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr 2017;14:20.
- Bauer J, et al. PROT-AGE Study Group recommendations for older people. J Am Med Dir Assoc 2013.
- USDA FoodData Central (food protein values).