Protein Intake Calculator

The Protein Intake Calculator is a free online tool that calculate daily protein needs based on weight, activity level, and goal (maintain/build muscle/lose fat/endurance). shows grams per meal, high-protein food sources with protein per 100g.. It runs entirely in your browser with no installation or sign-up needed.

To build muscle, most research supports 1.6–2.2g of protein per kg of body weight per day. Distribute this across 3–5 meals for optimal muscle protein synthesis.

Yes. Older adults (50+) benefit from higher protein intake (1.0–1.2g/kg minimum) to combat sarcopenia (age-related muscle loss), compared to the 0.8g/kg minimum for younger sedentary adults.

For healthy adults, high protein intake (up to 2.2g/kg) is generally safe. However, those with pre-existing kidney disease should consult a doctor before increasing protein significantly.

Yes, the Protein Intake Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Protein Intake Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Protein Intake Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Protein Intake Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Protein Intake Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Protein guidelines are written in grams per kilogram of body weight, so a weight in pounds has to be converted first. One pound equals about 0.4536 kg, so a 180 lb person weighs roughly 82 kg; at a muscle-building target of 1.6–2.2g per kg, that works out to about 131–180g of protein per day. You don't have to do this math by hand — this calculator has a lbs toggle that converts your weight to kilograms automatically before applying the formula, so the result is identical whether you enter 180 lbs or 82 kg. Just type your weight, tap the kg or lbs badge to match how you weigh yourself, and the daily gram range updates instantly. Pick your goal and activity level and the converted target appears with no unit guesswork.

The goals overlap but aren't identical. To build muscle, current sports-nutrition guidance points to 1.6–2.2g of protein per kg of body weight, giving your body a clear surplus of amino acids to add tissue. When you're losing fat, the target is slightly lower at about 1.4–1.8g per kg, but the purpose shifts: you're eating in a calorie deficit, and a high protein intake protects the muscle you already have so the weight you lose comes from fat rather than lean mass. Protein also keeps you fuller, which helps with a deficit. This calculator lets you switch between "Build Muscle" and "Lose Fat (preserve muscle)" goals and instantly shows how the daily gram range changes, so you can see exactly what each objective asks of your diet before you plan your meals.

Total daily protein matters most, but how you spread it makes a difference too. Muscle protein synthesis responds best when protein is distributed fairly evenly through the day rather than crammed into one large meal, so most guidance favours three to five portions of similar size. For a 160g daily target, that's roughly 53g across three meals, 40g across four, or 32g across five — numbers small enough to hit with normal portions of chicken, eggs, yogurt, or a protein shake. Seeing a per-meal figure also makes an abstract daily goal feel concrete; planning a 40g breakfast is far easier than chasing 160g over a whole day. This calculator does the division for you, showing your target split across 3, 4, 5, and 6 meals at once so you can pick the eating pattern that fits your schedule.

Yes, though it takes a little more planning because animal foods are more protein-dense per 100g. Chicken breast carries about 31g and whey powder about 75g per 100g, while plant sources sit lower: lentils around 9g, black beans and tofu about 8g each, and cooked quinoa roughly 4g. To reach a target like 130g a day from plants you'll lean on larger portions and combine several sources — tofu, legumes, and a scoop of plant protein powder — alongside dairy if you eat it, such as Greek yogurt at about 10g or cottage cheese at 11g per 100g. This calculator lists each food with its protein per 100g, so you can mix and match realistic servings and reverse-engineer a day of eating that meets your number without relying on meat.

It gives a solid, evidence-based starting range rather than a single perfect number. The estimate multiplies your body weight in kilograms by a protein-per-kg range tied to your goal, then scales it by activity level, which reflects the main drivers of protein need recognised in sports nutrition. What a weight-based formula can't capture is your exact body composition, training intensity, total calorie intake, or individual response, so two people of the same weight may thrive at slightly different intakes. That's why the result is shown as a range, not a fixed target — treat the lower end as a floor and adjust upward based on how you recover, train, and progress. For healthy adults this approach is reliable for everyday planning; use this calculator's range as your baseline, then fine-tune over a few weeks of real-world feedback.