How much protein per day based on your goal

Updated: July 21, 2026

"You need to eat protein" — you've read it everywhere. But specifically, how much? 80g? 150g? 200g? The truth is, the answer depends on your weight, your goal, and your activity level — not some magic number you saw on Instagram. Let's clear things up with simple benchmarks you can start using today.

Why protein is the one macro you can't afford to skip

Before we get into numbers, a bit of context. Protein plays three key roles in your body transformation:

It builds and repairs muscle: without enough protein, you simply can't build muscle mass, no matter how hard you train.
It protects your muscle mass in a calorie deficit: when you're eating less to lose fat, your body tends to break down muscle too if you're not giving it enough protein.
It keeps you fuller than carbs or fat: for the same number of calories, a protein-rich meal curbs hunger better, which makes any diet way easier to stick with long-term.

Bottom line: whether your goal is to cut, bulk up, or just get back into regular exercise, protein is your best ally against giving up halfway through.

How much protein per day to lose fat

When you're cutting, the goal is twofold: maximize fullness and protect your muscle while you're in a calorie deficit. This is where protein becomes pretty much non-negotiable.

General benchmark: between 1.6 and 2.2g of protein per kg of body weight per day.
For someone weighing 154 lbs (70kg), that's between 112g and 154g of protein per day.
The bigger your calorie deficit, the more you should lean toward the top of that range to limit muscle loss.

A lot of diets fail because they cut calories without adjusting protein: you end up losing weight, sure, but a good chunk of it is muscle, not fat. That's exactly what Kaizmax's engine is built to avoid: it calculates your macros using the Mifflin-St Jeor formula, then adjusts your protein intake to protect your muscle during weight loss, instead of applying a generic ratio.

How much protein per day to build muscle

During a bulk (or simply when you're trying to get stronger and build muscle), your needs are slightly different but still fall in a similar range.

General benchmark: between 1.6 and 2g of protein per kg of body weight per day.
Beyond 2.2g/kg, studies don't show any meaningful extra benefit for muscle protein synthesis — no need to overdo it.
What really matters for building muscle is your overall calorie surplus combined with progressive resistance training. Protein supports muscle building, but it doesn't trigger it on its own.

Quick real-world example: for 176 lbs (80kg), aim for between 128g and 176g of protein per day, spread across 3 to 5 meals to optimize muscle protein synthesis throughout the day.

How much protein per day to get back into shape or stay fit

If your goal isn't to cut hard or pack on 10+ pounds of muscle, but just to get back into regular exercise or maintain your current shape, you don't need to be quite so precise.

General benchmark: between 1.2 and 1.6g of protein per kg of body weight per day.
This is more than enough to support recovery after your workouts and avoid deficiencies, without overcomplicating your diet.
If you're just getting back into exercise after a long break, focus on consistency rather than hitting an exact number: 100g spread evenly through the day beats 150g crammed into one meal.

Not sure which category you fall into?

This happens a lot when you're starting out: you want to "lose a bit of fat and gain a bit of muscle" at the same time. In that case, aiming for 1.8g/kg is a solid all-around compromise that works for most people, until you can fine-tune based on your results.

How to hit your protein target without turning into a walking calculator

Counting grams of protein at every single meal can get exhausting fast. Here's how to make it simple:

Build every meal around a protein source: eggs, chicken, fish, tofu, cottage cheese, legumes. If every plate has one, you'll naturally land close to your target.
Use visual cues: a portion of meat or fish about the size of your palm contains roughly 20 to 25g of protein.
Don't overlook plant-based sources: lentils, chickpeas, tofu, and edamame can cover a big chunk of your needs, even though they're slightly lower in protein per gram than animal sources.
Whey isn't mandatory, but it's still a convenient, budget-friendly way to close the gap at the end of the day if you're falling short of your target.

This is exactly what Kaizmax handles behind the scenes: instead of giving you one number to memorize, the app translates your macro goals into rep

This article is informational and not a substitute for medical advice. In case of a health condition, pregnancy or doubt, consult a healthcare professional.

Want to go further? Browse all the Kaizmax guides. And for your tailored diet + training plan: join the Kaizmax waitlist — a short questionnaire, ready in 2 minutes.