Protein intake:
work out your daily grams from your weight

How much protein do you need per day?

Daily protein is worked out from body weight: multiply your weight in kilograms by a grams-per-kilogram factor that suits your activity level. A protein intake calculator does exactly this multiplication, nothing more, so the choice of factor is the whole decision.

A commonly used baseline for healthy adults is around 0.8 g per kg per day. People who train regularly, are building muscle or are in a calorie deficit are often given higher planning figures, usually between about 1.2 and 2.0 g per kg. These are planning ranges, not prescriptions.

Individual needs differ with age, pregnancy, illness, kidney function and the type of protein you eat. If any of those apply to you, ask a doctor or a registered dietitian before changing your intake.

One more thing: a gram of protein is not a gram of food. A 100 g portion of paneer or chicken contains well under 100 g of protein, so always work from the protein number on the label or in a food table rather than the weight of the portion.

The protein intake formula

Worked through in words: take 70 kg and a factor of 1.2 g per kg. Then 70 × 1.2 = 84 g of protein a day. If you eat three meals, that is 28 g each; with a snack added, it is 21 g across four occasions.

1. 1Weigh yourself and note the figure in kilograms.
2. 2Pick a grams-per-kg factor that matches your goal and activity.
3. 3Multiply to get grams per day.
4. 4Divide by the number of meals and snacks you actually eat.

Worked example: a 62 kg person who trains four days a week

The same person at a baseline of 0.8 g per kg would need 62 × 0.8 = 49.6 g, about 50 g. The difference is about 37 g a day, roughly two eggs, 100 g of paneer and a glass of milk, so the choice of factor changes what you eat.

Which grams-per-kg factor should you pick?

Many people overshoot because they start from the highest figure they have read online. A target you can meet on an ordinary Tuesday is worth more than an ambitious one you give up on by Thursday.

The factor is where judgement comes in. Instead of searching for one perfect figure, match it to your situation and treat the result as a range.

• About 0.8 g per kg: a general baseline for healthy adults with light activity and no specific muscle or weight goal.
• About 1.0 to 1.2 g per kg: moderately active adults, older adults who want to protect muscle, or people eating little animal protein.
• About 1.2 to 1.6 g per kg: regular strength or endurance training, or a deliberate calorie deficit where you want to keep lean mass.
• About 1.6 to 2.0 g per kg: hard training for muscle gain, usually under the guidance of a coach or dietitian.

If you are not sure, start in the middle of the row that matches you, eat that way for two or three weeks, and then review how you feel, how you recover and what the scale and tape say.

Protein per day by body weight and factor

Read across the row nearest to your weight. The 0.8 column is the baseline, the middle columns cover regular exercise, and 2.0 is the upper end that some sports nutrition guidance uses for athletes in hard training.

If your weight falls between two rows, interpolate. A 65 kg person is halfway between the 60 kg and 70 kg rows, so at 1.2 g per kg the answer is halfway between 72 g and 84 g, which is 78 g. A direct multiplication gives the same figure: 65 × 1.2 = 78.

A higher factor is not automatically better. Past the point of need, extra protein mostly adds calories and cost, and it does not build muscle on its own: training and total energy intake matter just as much.

Turning grams into food

Targets only help when you know what they look like on a plate. These are approximate values; brands, recipes and portion sizes vary, so check the label when it matters.

For the 87 g example, two eggs and a glass of milk at breakfast (about 20 g), dal and curd at lunch (about 15 g), 100 g of paneer or a bowl of sprouts as an evening snack (about 18 g) and a dinner with 100 g of cooked chicken (31 g) comes to about 84 g, which is close enough to 87 g without any supplement.

Mistakes people make with protein targets

• Using total weight when you are well above a healthy weight. Some guidance uses a reference or adjusted weight instead; a dietitian can tell you which applies.
• Counting powder by scoop weight. A 30 g scoop usually contains about 20–25 g protein, and the label says exactly how much.
• Hitting the total at dinner. Spreading protein through the day is easier to digest and easier to sustain.
• Ignoring protein quality. Cereals and pulses together can cover a vegetarian pattern, but you may need a slightly higher total if most protein comes from cereals.
• Pushing very high targets on kidney disease or reduced kidney function. That needs medical supervision.

Whatever target you choose, review it when your weight changes by about 5 kg or when your training changes. A person who loses 8 kg of weight needs less protein in absolute grams at the same factor, and one who moves from a desk job to heavy training needs more.

Protein intake is one piece of the picture: calories decide whether you gain or lose weight, and protein helps keep lean mass and fullness while you do it. For splitting the rest of your calories, see the macro nutrients guide.