Protein Intake Calculator
This free protein intake calculator shows how much protein you should eat per day, based on your weight, your goal, and how active you are. Whether you want to lose weight, build muscle, or just eat healthier, enter your details below for a clear daily target you can actually hit.
What your protein target means
Your main result is a realistic daily protein goal in grams, the amount that best supports your body and your chosen goal. The three cards below break it down further:
- Sensible range: protein isn’t an exact science, so anywhere in this range is a good day. Hitting the middle is a great target.
- Per meal: spreading your protein across about four meals or snacks helps your body use it well, so this is roughly how much to aim for each time you eat.
- Per kg of body weight: the factor behind your number, handy if you want to check it against other guidance.
These are starting points, not strict rules. Get close most days and you’re doing brilliantly.
Why protein matters, especially when you’re starting out
Of all the nutrition changes a beginner can make, getting enough protein is one of the most rewarding, and one of the most commonly overlooked. Protein is the raw material your body uses to build and repair muscle, which is exactly what you’re asking it to do the moment you start exercising. Skimp on it and you make progress harder than it needs to be.
Beyond muscle, protein pulls its weight in a few big ways:
- It keeps you fuller for longer, which makes eating a sensible amount feel far easier, a huge help if weight loss is your goal.
- It protects your muscle in a calorie deficit, so when you do lose weight, more of it comes from fat.
- It supports recovery after workouts, so you bounce back quicker and feel less wrecked.
- It powers the everyday machinery of your body, from enzymes and hormones to a healthy immune system.
In short, hitting a sensible protein target quietly makes every other part of your routine work better. That’s why it’s worth a couple of minutes to find your number and build your meals around it.
How much protein do you really need?
The bare minimum to avoid a deficiency is about 0.8 grams of protein per kilogram of body weight a day, the official RDA. But “not deficient” and “thriving” are very different things. If you’re active, trying to lose weight, or building muscle, the research points to noticeably more:
| Your goal | Protein per day |
|---|---|
| General health (sedentary) | 0.8–1.2 g/kg |
| Active & general fitness | 1.2–1.6 g/kg |
| Losing weight (keep muscle) | 1.6–2.0 g/kg |
| Building muscle | 1.6–2.2 g/kg |
Two situations deserve a little extra: if you’re losing weight, higher protein keeps you full and protects the muscle you’d otherwise lose in a calorie deficit; and if you’re over about 65, aiming a bit higher helps fight the natural muscle loss that comes with age. Our calculator factors both of these in for you.
How to hit your protein target: a beginner plan
A big daily number can feel intimidating until you see how quickly real food adds up. The trick is simple: include a protein source in every meal and snack. Here’s what common foods give you:
| Food | Protein |
|---|---|
| Chicken breast (100 g cooked) | ~31 g |
| Greek yogurt (170 g pot) | ~17 g |
| Two large eggs | ~12 g |
| Canned tuna (1 tin) | ~25 g |
| Lentils or black beans (1 cup cooked) | ~16 g |
| Firm tofu (100 g) | ~15 g |
| Cottage cheese (½ cup) | ~12 g |
| Whey protein (1 scoop) | ~24 g |
- Anchor each meal with protein. Eggs or yogurt at breakfast, chicken or beans at lunch and dinner, and you’re most of the way there.
- Use your per-meal number from the calculator as a simple target for each plate.
- Keep easy options handy for busy days, tinned fish, yogurt, or a protein shake close the gap fast.
- Track loosely for a few days with a food app so you learn what your meals actually contain. Most beginners are surprised how far off their guess was.
Common mistakes to avoid
- Loading it all into dinner. Your body handles protein best when it’s spread through the day, not crammed into one giant evening meal.
- Forgetting protein at breakfast. It’s the meal most people skimp on, and a protein-rich start curbs cravings later.
- Assuming you need powders. Supplements are convenient, not magic. Real food can cover your whole target.
- Chasing extreme numbers. More isn’t endlessly better. Once you’re in your range, extra protein mostly just adds calories.
- Ignoring the rest of your diet. Protein matters, but so do vegetables, fibre, and your overall calorie intake.
Helpful tips
- Prioritise protein first on your plate, then build the rest of the meal around it.
- Keep high-protein snacks visible, a bowl of eggs or a tub of yogurt in the fridge makes the healthy choice the easy one.
- Recalculate if your weight changes by a few kilograms, since your target shifts with it.
- Pair your protein goal with regular movement, our beginner home-workout guide is a great place to start.
How this calculator works
We use the method dietitians and sports scientists rely on: protein per kilogram of body weight, adjusted for your goal and activity. If you enter imperial units, we convert your weight to kilograms first (1 lb = 0.4536 kg).
Daily protein = your weight (kg) × a factor for your goal
The factor comes from the ranges in the table above, nudged toward the higher end if you’re more active, and given a gentle floor if you’re 65 or older. It’s the same evidence-based approach used in major position stands on protein and exercise. Because everyone is a little different, we show a range rather than pretending there’s one perfect number.
Frequently asked questions
How much protein should I eat per day?
It depends on your weight, goal, and activity. As a guide, sedentary adults need around 0.8–1.2 g per kg of body weight, while active people, those losing weight, or building muscle do better on roughly 1.6–2.2 g per kg. Enter your details above for a personalised number.
How much protein do I need to lose weight?
Higher protein really helps when you’re losing weight, usually around 1.6–2.0 g per kg of body weight. It keeps you fuller on fewer calories and protects your muscle while you’re in a calorie deficit, so more of what you lose is fat.
How much protein to build muscle?
For building muscle, aim for about 1.6–2.2 g per kg of body weight per day, paired with regular strength training. Going much higher than that offers little extra benefit for most beginners.
Is the protein calculator different for women?
No. Protein needs are based on body weight and goal, not sex, so the same calculation works for women and men. A 70 kg woman and a 70 kg man with the same goal need about the same protein.
Can you eat too much protein?
For healthy people, high-protein diets are considered safe. Very high intakes just tend to add calories without extra benefit. If you have a kidney condition, check with your doctor before increasing protein significantly.
How much protein can the body absorb per meal?
You absorb all the protein you eat; the idea of a hard per-meal cap is a myth. That said, spreading protein across the day (roughly your per-meal figure) is a practical, effective way to hit your total.
Do I need protein powder to reach my target?
Not at all. Whole foods like eggs, chicken, fish, dairy, beans, and tofu can cover your entire target. Protein powder is simply a convenient option for busy days or when whole food is hard to fit in.
Can I hit my protein goal on a plant-based diet?
Yes. Lentils, beans, tofu, tempeh, edamame, and soy milk are all protein-rich. Vegans may aim slightly higher and eat a variety of sources to cover all the amino acids, but the target itself is the same.
When is the best time to eat protein?
Spread across the day beats any single “magic” time. Including protein at breakfast, lunch, and dinner, plus a snack, is more important than eating it right after a workout.
Is a high-protein diet safe?
For most healthy adults, yes. Concerns about protein harming healthy kidneys aren’t supported by the evidence. As always, if you have an existing health condition, it’s wise to speak with your doctor or a dietitian first.
References
Protein targets are based on the Dietary Reference Intakes from the National Academies of Sciences (RDA of 0.8 g/kg) and evidence-based position stands on protein and exercise, including the International Society of Sports Nutrition and a systematic review in the British Journal of Sports Medicine (Morton et al.). For general guidance, see the U.S. Dietary Guidelines.
What should I do next?
You know your protein target. Here is where to go next.
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