How Much Protein Do You Actually Need? A Practical Answer
Skip the debate. Here's a protein target you can calculate in ten seconds, why it changes when you're dieting, and how to hit it without weighing every meal.
Protein is the only macronutrient where the internet's loud arguments actually cash out to a fairly boring, fairly settled answer. Most people are either wildly under it or anxiously over-optimising it, and both groups would be better served by one number and a plan to hit it.
The number
1.6 to 2.2 grams per kilogram of bodyweight per day. (Roughly 0.7–1.0 g per pound.)
For an 80 kg person, that's 128–176 g a day. Pick a number in that range, aim at it, move on.
Two adjustments worth making:
- If you're carrying significant excess body fat, calculate from a target bodyweight rather than current — body fat doesn't need feeding protein. An oversimplified but workable version: use the weight you'd reasonably be at a lean-ish bodyfat.
- If you're in a meaningful calorie deficit, go to the upper end. Protein needs go up while dieting, not down, because it's doing double duty: preserving muscle while you're under-fuelled and keeping you full.
That's genuinely the whole prescription. Everything below is about actually hitting it.
Why the range, and why the top of it while dieting
Protein does two jobs that matter here.
It supplies the raw material for muscle. Training creates the signal; protein supplies the bricks. Below roughly 1.6 g/kg, most people in a training programme are supply-limited — they're doing the work and not fully banking it.
It protects muscle when energy is short. In a deficit, your body will happily break down tissue to cover the gap. Higher protein plus resistance training is the combination that biases that loss toward fat rather than muscle. This is the single highest-leverage nutrition decision in a fat-loss phase.
Above about 2.2 g/kg the returns flatten hard for almost everyone. It isn't harmful in healthy people, but it's displacing calories you could spend on carbohydrate to fuel training. There's no prize for 3 g/kg.
Does timing matter?
Much less than the supplement industry implied for two decades.
The "anabolic window" of 30 minutes was never well supported. What does hold up:
- Total daily intake is by far the dominant variable. Hit the number; the rest is rounding.
- Spreading it across 3–5 meals of roughly 0.3–0.4 g/kg each is mildly better than two big hits, mostly because it's easier to eat that way and keeps you full.
- A protein-containing meal within a few hours either side of training is sensible. "Within 30 minutes" is not required.
If you're hitting 160 g a day across four meals, stop optimising. There's nothing left there worth your attention.
Hitting the number without weighing everything
Most people fail on protein not because they don't know the target, but because their meals aren't built around it. Two fixes do almost all the work.
Fix one: anchor every meal with a protein source first. Decide the protein, then build the rest of the plate. Most people do the reverse — they decide on pasta, then discover there's 12 g of protein in it.
Fix two: learn five portions by sight. You don't need a food scale forever. You need to know what these look like:
| Food | Portion | Protein |
|---|---|---|
| Chicken breast | Palm-sized, ~150 g | ~45 g |
| Greek yoghurt (0%) | Large bowl, ~250 g | ~25 g |
| Eggs | Three | ~18 g |
| Tinned tuna | One tin | ~25 g |
| Whey shake | One scoop | ~24 g |
| Lentils, cooked | One cup | ~18 g |
| Tofu, firm | ~200 g | ~30 g |
Weigh things for two weeks to calibrate your eye, then stop. The goal is a trained estimate, not a permanent spreadsheet.
A worked day at ~165 g:
- Breakfast: Greek yoghurt + berries + a scoop of whey — 50 g
- Lunch: chicken breast, rice, vegetables — 48 g
- Snack: two eggs on toast — 20 g
- Dinner: salmon fillet, potatoes, salad — 40 g
- Evening: a small yoghurt — 12 g
No exotic foods, no six-meal prep ritual. Four anchors and a snack.
Plant-based? Slightly different, not harder
Two adjustments:
- Aim 10–20% higher, toward the top of the range, since plant proteins are generally lower in leucine and less digestible.
- Vary the sources across the day — soy, legumes, seitan, pea protein. Chasing "complete proteins" at every single meal is unnecessary; varying across the day covers it.
Soy and pea protein isolates in particular make plant-based targets straightforward. The people who struggle are usually relying on nuts and whole grains, which are mostly fat and carbohydrate with protein attached.
What about kidneys?
In people with healthy kidneys, higher protein intakes in this range have not been shown to cause damage. This is one of the most persistent myths in nutrition.
The genuine caveat: if you have existing kidney disease, this is a conversation for your physician, not an article. Same goes for pregnancy and a handful of metabolic conditions. Nothing here is medical advice.
The short version
- 1.6–2.2 g/kg/day. Top of the range when dieting.
- Calculate from a target weight if you're carrying a lot of excess fat.
- Anchor each meal with protein first, 3–5 times a day.
- Learn five portions by eye, then stop weighing.
- Timing is a rounding error compared to the daily total.
Protein is the one nutrition variable where doing the obvious thing consistently outperforms almost any clever intervention. Set the number, build your meals around it, and spend your remaining attention on training and sleep — which is where the rest of the result lives.