Protein Calculator

This protein calculator estimates how many grams of protein you should eat each day, based on your body weight, your activity level, and your goal. Protein is the most satiating of the three macronutrients and is essential for muscle repair, immune function, hormones, enzymes, and the structure of skin, hair, and nails. Because daily needs scale with how much lean tissue you carry and how hard you train, a single number cannot apply to everyone — this tool personalises the target to you.

It is built for anyone trying to eat more deliberately: gym-goers chasing muscle, people in a fat-loss phase who want to protect the muscle they already have, busy professionals who simply want a sensible daily floor, and vegetarians planning a balanced thali. Enter your weight (in kg or lbs), pick the activity band that matches your week, choose a goal, and you get a daily target, a per-meal split, and a safe minimum-to-maximum range.

How it works — the exact formula

The calculator multiplies your body weight in kilograms by a protein factor expressed in grams of protein per kilogram of body weight (g/kg):

Base protein (g) = body weight (kg) × activity factor

The activity factor is 0.8 g/kg for sedentary, 1.0 g/kg for light activity, 1.2 g/kg for moderate, and 1.6 g/kg for an athlete. Your goal then adds a small top-up on top of the base: +0.3 g/kg for weight loss (extra protein preserves muscle in a calorie deficit), +0 g/kg for maintenance, +0.4 g/kg for muscle building, and +0.6 g/kg for an elite athlete. So the full target is daily protein = (weight × activity factor) + (goal extra × weight). The result also shows calories from protein (grams × 4, since protein carries 4 kcal/g) and a per-meal figure (daily target ÷ 4 meals).

Worked example

Take a 75 kg person who exercises 3–5 days a week (moderate, factor 1.2) and wants to build muscle (goal extra 0.4). Base protein is 75 × 1.2 = 90 g. The muscle-building top-up is 0.4 × 75 = 30 g. The daily target is 90 + 30 = 120 g of protein, which is 120 × 4 = 480 kcal from protein, or roughly 30 g spread across each of four meals. If the same person were sedentary and only wanted maintenance, the target would drop to 75 × 0.8 = 60 g — a useful reminder that the number moves a lot with activity and goal.

Recommended intake ranges

Sedentary adults: 0.8 g/kg (RDA minimum)

Active adults: 1.0–1.6 g/kg

Muscle building: 1.6–2.2 g/kg (research consensus)

Maximum studied benefit: ~2.2 g/kg — beyond this shows no additional benefit for most people, which is why the tool caps the displayed range at about 2.0 g/kg.

Tips to hit your target

Front-load protein at breakfast — most Indian breakfasts (poha, idli, paratha) are carb-heavy, so add eggs, paneer, sprouts, curd, or a glass of milk. Anchor every meal with a protein source first, then build the rest of the plate around it. Keep convenient options on hand: roasted chana, peanuts, Greek yoghurt, soya chunks, or a whey scoop for days you fall short. Spreading intake across 4–5 meals (every 3–4 hours) helps you actually reach the daily total without one enormous meal.

Common mistakes

Eyeballing portions is the biggest one — most people overestimate how much protein a meal contains, so weigh foods until you build a reliable sense of scale. Counting cooked dal or curd as "mostly protein" is another trap; lentils are roughly 9 g per 100 g cooked, so a katori is a side, not your whole quota. Vegetarians often fall short because plant sources are less protein-dense — combine grains and pulses (rice + rajma, roti + dal) for a fuller amino-acid profile and consider eating a little more total protein to compensate. Finally, do not chase ever-higher numbers: past about 2.2 g/kg there is no extra muscle-building benefit for most people.