How Much Protein Do You Need by Weight?
For most healthy adults, body weight is the simplest place to start. Multiply your weight in kilograms by a protein target in grams per kilogram:
Daily protein (grams) = body weight (kg) × protein target (g/kg)
| Reference point | Per kilogram | Per pound | What it means |
|---|---|---|---|
| Traditional adult RDA | 0.8 g/kg | 0.36 g/lb | A baseline designed to meet the needs of nearly all healthy adults |
| Current U.S. dietary guidance | 1.2–1.6 g/kg | 0.54–0.73 g/lb | A general protein serving goal, adjusted for individual calorie needs |
| Regular exercise | 1.4–2.0 g/kg | 0.64–0.91 g/lb | A sports-nutrition range for most healthy people who train |
Why are there three answers? The 0.8 g/kg RDA, the 2025–2030 U.S. Dietary Guidelines, and sports-nutrition recommendations answer slightly different questions. Think of them as reference points—not three experts fighting over your lunch.
Body weight gives you a useful starting line. Your activity, age, health, calorie intake, and goal help determine where you finish.
Protein Intake Chart by Weight in Pounds
Use the row closest to your current body weight. Each result is rounded to the nearest gram. The pound calculations were converted to kilograms first, which keeps the math consistent with the research.
| Weight | Approx. kg | RDA 0.8 g/kg |
U.S. guidance 1.2–1.6 g/kg |
Exercise 1.4–2.0 g/kg |
|---|---|---|---|---|
| 90 lb | 41 kg | 33 g | 49–65 g | 57–82 g |
| 100 lb | 45 kg | 36 g | 54–73 g | 64–91 g |
| 110 lb | 50 kg | 40 g | 60–80 g | 70–100 g |
| 120 lb | 54 kg | 44 g | 65–87 g | 76–109 g |
| 130 lb | 59 kg | 47 g | 71–94 g | 83–118 g |
| 140 lb | 64 kg | 51 g | 76–102 g | 89–127 g |
| 150 lb | 68 kg | 54 g | 82–109 g | 95–136 g |
| 160 lb | 73 kg | 58 g | 87–116 g | 102–145 g |
| 170 lb | 77 kg | 62 g | 93–123 g | 108–154 g |
| 180 lb | 82 kg | 65 g | 98–131 g | 114–163 g |
| 190 lb | 86 kg | 69 g | 103–138 g | 121–172 g |
| 200 lb | 91 kg | 73 g | 109–145 g | 127–181 g |
| 210 lb | 95 kg | 76 g | 114–152 g | 133–191 g |
| 220 lb | 100 kg | 80 g | 120–160 g | 140–200 g |
| 230 lb | 104 kg | 83 g | 125–167 g | 146–209 g |
| 240 lb | 109 kg | 87 g | 131–174 g | 152–218 g |
| 250 lb | 113 kg | 91 g | 136–181 g | 159–227 g |
Between two rows? You do not need laboratory precision. Use the closer row, or calculate your exact result with the formula below.
Protein Intake Chart by Weight in Kilograms
The kilogram chart runs from 40 to 120 kg in 5 kg steps. If your weight falls between rows, choose the nearest value or multiply your exact weight by the target that fits your situation.
| Weight | Approx. lb | RDA 0.8 g/kg |
U.S. guidance 1.2–1.6 g/kg |
Exercise 1.4–2.0 g/kg |
|---|---|---|---|---|
| 40 kg | 88 lb | 32 g | 48–64 g | 56–80 g |
| 45 kg | 99 lb | 36 g | 54–72 g | 63–90 g |
| 50 kg | 110 lb | 40 g | 60–80 g | 70–100 g |
| 55 kg | 121 lb | 44 g | 66–88 g | 77–110 g |
| 60 kg | 132 lb | 48 g | 72–96 g | 84–120 g |
| 65 kg | 143 lb | 52 g | 78–104 g | 91–130 g |
| 70 kg | 154 lb | 56 g | 84–112 g | 98–140 g |
| 75 kg | 165 lb | 60 g | 90–120 g | 105–150 g |
| 80 kg | 176 lb | 64 g | 96–128 g | 112–160 g |
| 85 kg | 187 lb | 68 g | 102–136 g | 119–170 g |
| 90 kg | 198 lb | 72 g | 108–144 g | 126–180 g |
| 95 kg | 209 lb | 76 g | 114–152 g | 133–190 g |
| 100 kg | 220 lb | 80 g | 120–160 g | 140–200 g |
| 105 kg | 231 lb | 84 g | 126–168 g | 147–210 g |
| 110 kg | 243 lb | 88 g | 132–176 g | 154–220 g |
| 115 kg | 254 lb | 92 g | 138–184 g | 161–230 g |
| 120 kg | 265 lb | 96 g | 144–192 g | 168–240 g |
For a closer look at the highlighted example, see our guide to protein intake for a 70 kg person.
Which Protein Range Should You Use?
The chart is only useful if you know which column to read. Start with the range that best matches your usual week—not the workout routine you plan to begin “next Monday.”
| Use case | Protein target | How to interpret it |
|---|---|---|
| Baseline | 0.8 g/kg 0.36 g/lb |
The traditional adult RDA. Useful as a baseline, but not designed as an optimal muscle-building target. |
| General goal | 1.2–1.6 g/kg 0.54–0.73 g/lb |
The protein serving goal in the 2025–2030 Dietary Guidelines, adjusted for individual calorie needs. |
| Regular training | 1.4–2.0 g/kg 0.64–0.91 g/lb |
The ISSN range considered sufficient for building and maintaining muscle in most healthy exercising people. |
A practical way to choose
- Little structured exercise: use the RDA as a baseline, then consider current U.S. guidance and your overall diet.
- Regular recreational activity: the middle of the 1.2–1.6 g/kg range is a practical starting point for many healthy adults.
- Resistance or demanding endurance training: consider the 1.4–2.0 g/kg exercise range.
- Muscle gain: around 1.6 g/kg is a strong evidence-based starting point; a large meta-analysis found diminishing additional benefit beyond roughly this intake.
- Calorie deficit with hard training: needs may sit toward the higher end, but the right target depends on body composition and the size of the deficit.
For a more detailed activity breakdown, read how much protein you need based on activity level.
Protein Calculation Examples
Example 1: 150 pounds
First convert pounds to kilograms:
150 ÷ 2.205 = 68 kg
- Traditional RDA: 68 × 0.8 = about 54 g/day
- Current U.S. guidance: 68 × 1.2–1.6 = about 82–109 g/day
- Exercise range: 68 × 1.4–2.0 = about 95–136 g/day
Example 2: 70 kilograms
- Traditional RDA: 70 × 0.8 = 56 g/day
- Current U.S. guidance: 70 × 1.2–1.6 = 84–112 g/day
- Exercise range: 70 × 1.4–2.0 = 98–140 g/day
Shortcut for pounds: multiply pounds by 0.36 for the RDA, 0.54–0.73 for current U.S. guidance, or 0.64–0.91 for the exercise range.
If you want to understand the calculation step by step, see how protein intake is calculated.
Turn the Chart Into a Personal Target
Your weight is one piece of the answer. Add your age, activity level, and goal to get a more useful daily protein estimate in less than a minute.
Important Details the Chart Cannot Show
Should you use current weight or goal weight?
For a simple estimate, the tables use current body weight. However, total body weight can overstate protein needs for some people with a higher body-fat percentage. During major weight loss, or when body composition makes a simple calculation less useful, a registered dietitian can help select an appropriate reference weight.
Do you need one gram of protein per pound?
Usually not. One gram per pound equals about 2.2 g/kg, which is above the 1.4–2.0 g/kg range the ISSN identifies as sufficient for most exercising individuals. Some athletes may choose higher intakes in specific situations, but “one gram per pound” is a convenient gym rule, not a universal requirement.
Should you eat your protein all at once?
Total daily intake matters most, but distribution can make the target easier to reach. The ISSN suggests spreading protein doses across the day, roughly every three to four hours. For example, a 120 g target could become four meals or snacks containing about 30 g each.
Does the source of protein matter?
Yes, but you do not need a perfect food at every meal. Build your intake from a variety of nutrient-dense sources such as eggs, dairy, seafood, poultry, lean meat, beans, peas, lentils, soy foods, nuts, and seeds. Plant-based eaters can meet protein needs by eating enough total protein and using varied sources across the day.
Medical note: Pregnancy, kidney or liver disease, eating disorders, recovery from surgery or illness, and some medications can change protein needs. Ask a qualified healthcare professional or registered dietitian before making a major change.
Frequently Asked Questions
How much protein should I eat per pound of body weight?
The traditional adult RDA equals about 0.36 g per pound. Current U.S. dietary guidance equals roughly 0.54–0.73 g per pound, while the common exercise range equals about 0.64–0.91 g per pound.
How much protein should I eat per kilogram?
Use 0.8 g/kg as the traditional adult RDA, 1.2–1.6 g/kg as the current U.S. dietary-guidance range, or 1.4–2.0 g/kg as a sports-nutrition range for most healthy exercising adults.
Is 100 grams of protein enough?
It depends on your weight and goal. For a 70 kg (154 lb) person, 100 g is about 1.43 g/kg—inside the exercise range. For a 100 kg (220 lb) person, it is 1.0 g/kg, below the current U.S. guideline range shown here.
Is the lowest number in the chart a minimum?
The 0.8 g/kg figure is the traditional RDA, intended to meet the needs of nearly all healthy adults. It should not automatically be treated as an ideal target for athletic performance, muscle gain, older age, or a medical condition.
Can I use this chart for a child or teenager?
No. Children and teenagers have age- and growth-specific needs. This chart is intended as a general educational reference for adults.
References
- U.S. Department of Health and Human Services and U.S. Department of Agriculture. Dietary Guidelines for Americans, 2025–2030. Protein serving goal: 1.2–1.6 g/kg/day, adjusted for individual calorie requirements.
- Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academies Press.
- Jäger R, et al. International Society of Sports Nutrition Position Stand: Protein and Exercise. Journal of the International Society of Sports Nutrition. 2017;14:20.
- Morton RW, et al. A Systematic Review, Meta-analysis and Meta-regression of the Effect of Protein Supplementation on Resistance Training-Induced Gains in Muscle Mass and Strength in Healthy Adults. British Journal of Sports Medicine. 2018;52(6):376–384.
Editorial note: This article provides general education, not medical advice. Protein needs vary, and the chart values are rounded estimates.
