Protein Calculator for Weight Loss

How Much Protein Do You Need to Lose Fat?

When you eat in a calorie deficit, your body can pull amino acids from muscle as well as fat. Eating enough protein — paired with some resistance training — is what tells it to hold on to the muscle and burn the fat instead. That’s why a fat-loss protein target sits higher than a general health one.

Research on lifters in a deficit points to roughly 1.6–2.2 g of protein per kg of bodyweight (about 0.7–1.0 g per lb) to protect lean mass, with the upper end most useful when you’re leaner or in an aggressive cut. The calculator above lands you inside that band based on how active you are: more training, more protein. Sedentary maintenance can sit comfortably lower.

Protein also does double duty for weight loss beyond muscle. It has the highest thermic effect of the three macros — you burn more of its calories digesting it — and it is the most filling macro per calorie, which makes a deficit easier to hold without constant hunger. To set your protein target inside a full daily calorie and macro plan, run the Macro Calculator.

Best High-Protein Foods for Fat Loss

The most useful foods for a cut deliver a lot of protein for few calories and keep you full for hours. Here are dependable, fat-loss-friendly options and their protein per 100g (raw or as-packaged):

• Chicken or turkey breast— ~29–31g protein, almost no fat. The default lean anchor for most cuts.
• White fish & canned tuna— cod ~18g, tuna in water ~26g, with very few calories.
• Nonfat Greek yogurt & low-fat cottage cheese — ~10–12g per 100g, casein-rich for slow-release fullness between meals.
• Egg whites— ~11g of nearly pure protein; whole eggs add fat and satiety if your calories allow.
• Lentils & tofu— the plant-based anchors, with lentils adding ~8g of fiber per 100g for extra fullness.

“High protein” alone doesn’t guarantee fullness, though — fat content, fiber, and water all change how filling a food is per calorie. To compare any two foods on that basis, score them in the Satiety Per Calorie Calculator; lean meats, low-fat dairy, and legumes consistently land in the high-satiety band, while fattier or processed proteins score lower.

When whole food can’t cover the target — a missed meal, a post-workout slot, a 150g+ day — a single scoop of powder fills the gap. Our best protein powders for satiety guide ranks options by protein per calorie and how full they keep you.

Protein Timing: Does It Matter?

The old “anabolic window” — the idea that you must slam protein within 30 minutes of training — has not held up well. For most people, total daily protein is the lever that matters most; hit your number and the exact clock timing is a minor detail.

Where timing does help a little: spreading protein across three to four meals of roughly 25–40g each tends to support muscle protein synthesis better than one or two huge servings, and it keeps you fuller across the day — a real advantage when you’re dieting. That’s why the calculator also shows your target divided across four meals. Beyond that, eat in the pattern you can actually stick to.

New to building a protein-forward plate? The PE Diet Guide walks through how to anchor every meal with protein without counting every gram.