In short: the official minimum is 0.8 grams of protein per kilogram of body weight per day, but that is a floor for avoiding deficiency rather than a target to aim for. If you are trying to lose fat or build muscle, most people do better at roughly 1.2 to 1.7 g/kg, and older adults should sit nearer 1.0 to 1.6 g/kg. None of it requires a gym membership or a supplement.
Ask five people how much protein you need and you will get five confident, contradictory answers. One insists that anything less than a gram per pound of body weight wastes a workout. Another says most people already eat far more protein than they need. Both are working from real research, which is exactly why the argument never seems to end. The truth is that the right number is a range, and yours depends on a handful of things you can check without a lab or a coach.
The official recommendation is lower than the fitness aisle suggests, and the ceiling is higher than the cautious headlines imply. Once you know how the numbers were built, you can stop guessing and pick a target that fits your body and your day, gym or no gym.
What the official numbers actually say
The figure most health agencies publish is the Recommended Dietary Allowance for protein: 0.8 grams per kilogram of body weight per day, about 0.36 grams per pound. For someone who weighs 70 kilograms, that works out to 56 grams a day. In calorie terms, the guidance is that 10 to 35 percent of your daily energy should come from protein.
It helps to understand what that number is and is not. The allowance was set to prevent deficiency in an average, mostly sedentary adult. It is the amount that keeps you from getting sick, not a target built for muscle, appetite control or healthy ageing. Treating it as the ideal is a little like treating the minimum wage as a career plan: it tells you the floor, not the ceiling.
The honest range: 0.8 to 2.0 grams per kilogram
Past the minimum, the evidence points to a surprisingly wide working range. Sedentary but otherwise healthy adults do fine near 0.8 grams per kilogram. Older adults generally need more, because the body becomes less efficient at using protein to rebuild muscle; guidance for people over 65 usually sits between 1.0 and 1.6 to help preserve muscle, strength and mobility. People who exercise regularly need roughly 1.1 to 1.7, and those training hard for strength or endurance can benefit from 1.4 to 2.0.
A 2026 review from Stanford put the revised guidance for many adults at 1.2 to 1.6 grams per kilogram, while making a point that rarely survives the retelling online: most adults in countries like the United States already eat around 90 to 100 grams a day, which for many of them is plenty. The same review noted that the old worry about incomplete plant proteins is largely misplaced, because in a mixed diet the amino acids add up across the day rather than needing to arrive in perfect balance at every meal.
So the range is broad on purpose. The person who needs the least is a young, healthy, inactive adult; the person who needs the most is an older adult who also trains. Almost everyone sits somewhere between those two poles.
Why a target still matters without a gym
Protein does more than build biceps. It is the material your body uses to repair and maintain muscle, and muscle is what keeps you strong, steady and independent as you age. Adults lose muscle gradually from their thirties onward, and a low-protein, low-activity life speeds that loss up.
Protein also affects appetite. Meals built around it tend to keep you full longer, which quietly makes overeating harder, and it slows the rise in blood sugar after a meal. That is part of why a protein-forward first meal steadies the whole day; I have written separately about why skipping breakfast backfires when the next meal is built from carbohydrate alone. None of this requires a gym membership. It requires knowing roughly what you are aiming for and getting it from food you already eat.
The number that matters most is per meal
Here is the part most calculators leave out. Your body does not use a day’s protein in one sitting; it uses it in pulses. Spreading protein across two or three meals of roughly 15 to 30 grams each is more effective for muscle maintenance than eating almost none at breakfast and cramming everything into dinner, which is the pattern a lot of people fall into without noticing.
A useful rule of thumb is a palm-sized portion of a protein food at each main meal, which lands at roughly 20 to 30 grams. It is easier to remember than a scale, and for most people it is close enough.
How to hit your target with food, not powders
The foods that carry the most protein per serving are unglamorous and cheap. One egg has about 6 grams. A small pot of Greek yogurt can hold 14 to 20. A palm-sized piece of chicken, beef or fish, about 3 to 4 ounces, gives you 21 to 28. A cup of cooked lentils or beans adds around 15 to 18, a cup of quinoa about 8, and firm tofu 10 to 14 per 3 to 4 ounces.
Put a few of those together and the target looks less like a chore. A breakfast of two eggs and a pot of Greek yogurt is already close to 30 grams. A lunch of chicken with beans clears it again. By dinner you are done, and you never opened a tub of powder. For a longer list, my post on the best protein sources for bodybuilding breaks it down further, and I have also looked at whether you really need to calculate your macros at all. Powders, for what it is worth, are convenience rather than magic: if you eat enough real food, a shake adds little beyond cost, and taking whey without doing any sport is largely pointless.
Can you eat too much protein?
For healthy people the ceiling is high. Most can safely eat up to about 2 grams per kilogram a day, which for a 150-pound person is roughly 135 grams, and there is no good evidence that this harms healthy kidneys. The caution matters for particular groups: people who already have kidney disease may need to limit protein, and anyone with kidney or liver conditions should set intake with a doctor rather than a blog.
If you have an existing kidney or liver condition, are pregnant, or are managing a chronic illness, talk to your doctor or a registered dietitian before raising your protein intake. The numbers here are general guidance and not personal medical advice, and a symptom that worries you deserves a professional eye rather than a search box.
A simple way to find your own number
Take your weight in kilograms (pounds divided by 2.2) and multiply it by a factor that fits you: 0.8 if you are young, healthy and inactive; 1.0 to 1.2 if you are over 50 or lightly active; 1.2 to 1.6 if you exercise regularly. A 75-kilogram person who walks daily and wants to hold on to muscle lands somewhere around 90 grams. Divide that by three meals and you have three palm-sized portions, a target almost anyone can keep.
In my own case, the lesson was less about grams and more about structure. I fast until about three in the afternoon and then eat protein portions until seven in the evening, and that pattern is what took me from 120 kilograms down to 79 while keeping my blood sugar steady. I was diagnosed prediabetic at nineteen, so protein was never a bodybuilding metric for me; it was the thing that kept me full and kept the numbers calm.
Be disciplined, strong, motivated, relentless – do not let what goes into your mouth control who you are or how long you’d live!
Casper, postandshare.net
In my case, working out the number was the easy part; eating that way every day was the habit that changed things. You do not need a gym or a shelf of supplements to get there. You need a target, a palm, and the patience to repeat it.
To turn these ranges into a daily target for your own weight and activity level, the protein and macro calculator does the arithmetic for you.
