Protein advice is full of big numbers: 60 grams, 100 grams, 150 grams. But what does any of that mean for your weight and your day? Pick a published reference, see the maths in grams, and turn a daily total into something that looks like breakfast, lunch and dinner.
For generally healthy adults aged 18+. This is a comparison of published reference ranges, not a personalised diet plan.
1.2–1.6 g/kg × 75 kg. Different authorities answer different questions. Switch references above to compare.
Range 90 to 120 grams a day, with an illustrative midpoint of 105 grams.
The midpoint, split evenly for illustration. The daily total is the number being compared; the division is just a way to picture it.
Splitting the total evenly is one way to picture it, not a rule. Real meals vary. Timing is not a magic switch.
At your current weight, the published references land in different places. Select one above to make it the main result.
0.83 g/kg — a single adult population reference, not a training target.
1.2–1.6 g/kg — current US dietary guidance, not a global rule.
1.4–2.0 g/kg — for generally healthy adults who exercise regularly.
These aren't three competing measurements of your body. They are different published reference systems and populations. A wider or higher range isn't automatically better for you.
Use the numbers printed on your own food label. This is an illustrative label value, not a claim about a named food.
20 g × 1.5 servings = 30 g. Package servings and the amount actually eaten may differ.
At the illustrative midpoint, the protein grams alone supply roughly 420 kcal (1,757 kJ). That describes protein alone, not the energy in a whole meal: food also contains carbohydrate, fat, fibre and water.
Weight: kilograms = pounds × 0.45359237. Daily grams = unrounded kilograms × the ratio. The illustrative midpoint is the average of the range's endpoints; it is not separately established as an optimum.
Meals: the displayed integer portions always add to the displayed daily illustration. They are one way to picture the total, not a prescribed schedule.
Energy: grams × 4 kcal, then × 4.184 for kilojoules. This is nutrition-label arithmetic for the protein grams alone.
Sources: EFSA adult protein reference; current US dietary guidelines and US 2025–2030 guidance; ISSN protein and exercise position stand; National Kidney Foundation on protein and kidney disease; FDA label-serving guidance.
For generally healthy adults 18+. These are published population references, not a diagnosis, prescription or meal plan. A bodyweight ratio cannot measure body composition, kidney function, pregnancy or individual medical needs. Under 18, pregnant or breastfeeding, kidney disease, dialysis, eating disorders, malnutrition and prescribed diets need tailored guidance from a qualified clinician or dietitian.
“Eat more protein” sounds straightforward until somebody asks how much more. Most people don't weigh their breakfast in grams of protein, and an instruction like “1.6 grams per kilogram” can make a normal lunch sound like a chemistry problem.
This calculator translates the ratio into a day you can picture. It starts with your bodyweight, shows the range in grams, and lets you spread an illustrative total across meals. Suddenly 105 grams is no longer just a number: it could be three meals of about 35 grams, or four smaller eating occasions. Not because they have to be equal, but because dividing a big number makes it easier to understand.
The other thing worth knowing is that there isn't one protein number everybody agrees on for every purpose. A population reference for meeting basic needs and a sports-nutrition range for people who train regularly are asking different questions. The calculator lets you see each one without pretending they're interchangeable.
Use the result to understand the scale of a day's protein, read a food label more confidently or discuss a nutrition plan with someone qualified. It is a starting point for understanding, not an instruction to chase a perfect number every night.
Two people can type 75 kg and about 165.35 lb and get the same answer — because those are the same weight in different units. The protein maths doesn't care which side of the Atlantic the bathroom scale came from.
For someone weighing 75 kg, changing a sample ratio from 1.2 to 1.6 g/kg adds 30 grams of protein to the day's calculation. The decimal looks tiny. The meal-planning difference isn't.
A 105-gram illustration sounds like a mountain until you divide it into three: 35 grams at breakfast, 35 at lunch and 35 at dinner. No single meal is carrying the whole day's maths.
If the label says 20 grams per serving and you eat one and a half servings, that's 30 grams. The serving size has done the multiplication while the front of the packet was busy trying to impress you.
Changing the reference from 0.8 to 1.6 g/kg doubles the protein calculation, not the size of every meal. Different foods contain very different proportions of protein. A gram of protein is not a gram of chicken, tofu or yoghurt.
The maths is short. The part that matters is choosing the right reference, because the same weight gives different figures when you ask a general-health question and a training question.
weight_kg = weight_lb × 0.45359237
weight_lb = weight_kg ÷ 0.45359237
The conversion uses full precision internally. Displayed weights are rounded, but no rounded intermediate value is fed back into the protein calculation.
daily_low_g = weight_kg × ratio_low_g_per_kg
daily_high_g = weight_kg × ratio_high_g_per_kg
illustrative_midpoint_g = (daily_low_g + daily_high_g) ÷ 2
For EFSA's single reference, the page uses one figure and no midpoint: adult_reference_g = weight_kg × 0.83. The average of a guideline range is a convenient visual centre, not a separately established optimum.
protein_per_meal = illustrative_midpoint_g ÷ number_of_meals
The cards use integer grams, and the displayed portions always sum to the displayed daily illustration. For 105 g over three meals that is 35 + 35 + 35. For four occasions the same 105 g is shared 27 + 26 + 26 + 26. Eating occasions do not have to be equal, and meal timing is not a magic switch.
protein_consumed_g = label_protein_g_per_serving × servings_eaten
For 20 grams per listed serving and 1.5 servings eaten: 20 × 1.5 = 30 g. Grams per serving and grams per 100 g are different columns on a label; use the serving figure with the number of servings actually eaten.
energy_kcal ≈ protein_g × 4
energy_kJ ≈ protein_g × 4 × 4.184
For 105 grams: ≈420 kcal and ≈1,757.28 kJ. This is the energy supplied by the protein grams alone, not the energy content of the whole foods that supplied them.
There isn't one number for everyone. Published references use bodyweight but answer different questions. EFSA's adult population reference is 0.83 g/kg a day. Current US dietary guidance uses 1.2–1.6 g/kg, while ISSN describes 1.4–2.0 g/kg for most healthy people who exercise regularly. Choose the reference that you're trying to understand, and treat it as context rather than a personal prescription.
Multiply your weight in kilograms by 1.6. At 75 kg that's 120 grams a day. If your scale uses pounds, this calculator converts the weight first — don't multiply pounds directly by a per-kilogram number.
It depends on your size, activity and why you're comparing protein amounts. A 100-gram daily intake corresponds to 1.25 g/kg for somebody weighing 80 kg, but about 1.67 g/kg for somebody weighing 60 kg. The same number can sit in a different part of the chart for different people, so the ratio and context matter.
No. Resistance exercise, overall food intake, recovery and individual circumstances matter too. Research supports sufficient protein for training adaptations, but eating beyond a calculated range doesn't guarantee extra muscle. The calculator compares published reference amounts; it does not predict muscle growth.
Not necessarily. The equal-meal cards are just a way to picture a daily amount. Three meals of 35 grams and other arrangements that total 105 grams are arithmetically equivalent for the day's total. Timing and distribution can matter in sports nutrition, but there isn't a universal requirement to divide every meal equally.
Yes. Protein from plant foods counts towards the total just as protein from animal foods does. Foods differ in how much protein they contain and in their amino-acid profiles, so a varied diet is important. Check a product's nutrition label or a dependable food-composition source when counting actual portions.
No. A 100-gram portion of food is not automatically 100 grams of protein. Food also contains water, fat, carbohydrates and other components. This is why the label example starts with grams of protein per serving, not grams of the whole food.
A general adult calculator is not appropriate for setting a clinical protein target. Kidney conditions, dialysis and other health circumstances can change protein requirements substantially, sometimes in opposite directions. Ask a qualified healthcare professional or dietitian who knows your situation.
Because the sources don't claim exactly the same thing. EFSA's 0.83 g/kg figure is a population reference intake, the US 2025–2030 advice is a wider general dietary range, and the ISSN range is intended for healthy exercising adults. Rather than hiding that difference, the calculator shows the source beside each number.
No. Many people can meet their dietary needs through ordinary meals. Supplements can be convenient for some people, but they're not automatically necessary, and this calculator does not recommend products. Food variety and your broader nutritional needs still matter.
Not sure where to go next? Let Cozy pick one of his favourites for you to try — the lighter end of the site, picked at random, and never the one you are reading.