How Much Protein Do I Need at 100 lbs? (100g a Day)
At 100 lbs (45 kg), aim for about 100g of protein a day, or 120g if you prioritize protein. Per-meal split and a sample day from USDA data.
At 100 lbs, a good daily protein target is 100g, using the 1 gram per pound anchor the Nouri app sets by default. If you turn on Prioritize Protein, it rises to 120g. That is 400 to 480 calories from protein a day.
Different weight? Use the full protein intake calculator, or jump to another weight below.
How 100g compares to official guidance
100 lbs is about 45 kg. Here is what the main published reference points work out to at that weight:
| Reference | Per kg | At 100 lbs |
|---|---|---|
| RDA (minimum for most adults) | 0.8 g | 36g |
| Dietary Guidelines 2025 to 2030 | 1.2 to 1.6 g | 54 to 73g |
| ISSN, most exercising people | 1.4 to 2.0 g | 64 to 91g |
| ISSN, resistance-trained in a calorie deficit | 2.3 to 3.1 g | 104 to 141g |
| Nouri default (1.0 g/lb) | 2.2 g | 100g |
| Nouri, Prioritize Protein (1.2 g/lb) | about 2.6 g | 120g |
The RDA is a floor to avoid deficiency, not a target for building or keeping muscle. Nouri's default sits just above the ISSN range for most exercising people, and the prioritized setting lands inside the range the ISSN describes for lifters eating in a deficit. If you have kidney disease or another medical condition, set your number with your doctor.
Protein per meal at 100 lbs
| Meals a day | Standard (100g) | Prioritized (120g) |
|---|---|---|
| 3 | 33g | 40g |
| 4 | 25g | 30g |
| 5 | 20g | 24g |
The ISSN describes 0.25 g/kg per dose, about 11g at your weight, or 20 to 40g, spread every 3 to 4 hours. Splitting evenly makes a big daily number feel ordinary.
A sample day that hits 100g
Protein anchors only, built from USDA FoodData Central values. Add vegetables, carbs, and cooking fat to fill the rest of your calories.
| Meal | Food | Amount | Protein | Calories |
|---|---|---|---|---|
| Breakfast | Greek yogurt, plain nonfat | 1 container (170g) | 17.3g | 100 |
| Breakfast | Egg, hard-boiled | 2 large | 12.6g | 155 |
| Lunch | Chicken breast, roasted | 3 oz (85g) | 26.4g | 140 |
| Snack | Cottage cheese, 1% | 1/2 cup (113g) | 14g | 81 |
| Dinner | Sockeye salmon, cooked | 4 oz (113g) | 30.1g | 177 |
| Total | 100.4g | 653 |
More options, ranked by protein per calorie, are in the 50 highest-protein foods, high-protein snacks, and the cheapest protein foods. Eating out? The High Protein Fast Food Finder sorts 708 menu items.
Other body weights
FAQ
How much protein should a 100 lb person eat a day?
Nouri's anchor is 1 gram per pound, so 100g a day, or 120g with protein prioritized. For comparison, the RDA minimum works out to about 36g and the ISSN range for most exercising people to 64 to 91g at 45 kg.
Is 100 grams of protein a day too much?
For a healthy, active person it is within the range sports nutrition research discusses: 100g is about 2.2 g/kg, between the ISSN's 1.4 to 2.0 g/kg for most exercising people and the 2.3 to 3.1 g/kg it describes for resistance-trained people in a calorie deficit. If you have kidney disease or another medical condition, ask your doctor first.
How much protein per meal at 100 lbs?
100g split evenly is about 33g across three meals, 25g across four, or 20g across five. The ISSN describes 0.25 g/kg (about 11g for you) or 20 to 40g per dose as a general guide.
What does 100g of protein look like in food?
The sample day above reaches 100.4g from USDA-measured foods: Greek yogurt and eggs at breakfast, chicken breast at lunch, a protein snack, and salmon at dinner, for 653 calories before sides, oils, and carbs.
Does the target change for men and women?
Not in this math. Nouri's anchor and the published ranges above are all per unit of body weight, so a 100 lb man and a 100 lb woman get the same number. Your total calories are what differ, which the daily calorie needs calculator works out.
Sources
- Jäger R, et al. "International Society of Sports Nutrition Position Stand: protein and exercise." JISSN, 2017. pmc.ncbi.nlm.nih.gov/articles/PMC5477153
- Dietary Guidelines for Americans, 2025 to 2030. cdn.realfood.gov/DGA.pdf
- USDA FoodData Central: Greek yogurt, plain nonfat, Egg, hard-boiled, Chicken breast, roasted, Sockeye salmon, cooked, Whey protein powder, Cottage cheese, 1%