Protein Intake Calculator
Daily protein target in grams from weight and activity level.
What it does
Protein need scales with body weight and training load. The official minimum sits near 0.8 grams per kilogram, enough to avoid deficiency in quiet adults. Active people and dieters need more, and muscle builders need most, with research ranges stretching to 2.2 per kilogram.
The tool above multiplies your weight by the range for your goal and splits the middle across four meals. It returns the daily span with a per meal anchor.
Distribution matters almost as much as total. Muscle building responds best to several servings of 25 to 50 grams through the day rather than one giant dinner, since each meal triggers its own round of repair.
Kidneys handle these amounts fine in healthy people, which large reviews confirm. Anyone with kidney disease follows doctor limits instead, since damaged kidneys process protein waste poorly.
How to use
- Switch the unit system first: metric for kilograms, imperial for pounds.
- Enter current body weight in kg.
- Pick the goal that matches training, not wishes.
- Read the daily span and aim inside it most days.
- Split across meals near the per meal number.
Formula
- weight in kg
- Current body weight. Very heavy dieters sometimes use target weight instead.
- factor
- 0.8 to 1.0 quiet, 1.2 to 1.6 active, 1.6 to 2.2 building.
- 4 meals
- Serving split that keeps each meal in the useful 25 to 50 g band.
Factors come from sports nutrition position stands pooling dozens of trials. Past about 2.2 per kg, extra protein shows little added muscle in studies.
Worked example
Example: 70 kg adult building muscle
Weight 70 kg, muscle building range 1.6 to 2.2.
- Low: 70 x 1.6 = 112 g.
- High: 70 x 2.2 = 154 g.
- Daily target: 112 to 154 g.
- Per meal: (112 + 154) / 2 / 4 = 33.25, shown as 33 g across four meals.
Reference table
| Weight | Quiet (0.8-1.0) | Active (1.2-1.6) | Building (1.6-2.2) |
|---|---|---|---|
| 60 kg | 48-60 g | 72-96 g | 96-132 g |
| 70 kg | 56-70 g | 84-112 g | 112-154 g |
| 80 kg | 64-80 g | 96-128 g | 128-176 g |
| 90 kg | 72-90 g | 108-144 g | 144-198 g |
Limits
- Healthy adult ranges. Kidney disease, gout, and some conditions need doctor limits.
- Uses total weight. Very high body fat overstates need a little.
- Ignores protein quality. Varied sources cover amino acids better.
- Athletes in heavy cuts may need the top end plus coaching.
Common mistakes
- Counting only dinner. Breakfast and lunch usually carry the gap.
- Chasing 200 grams with no training stimulus behind it.
- Fearing kidney harm from normal high intakes in healthy people.
- Reading collagen or broth as complete protein. They lack key aminos.
- Weighing cooked versus raw meat inconsistently across days.
Try it yourself
Quick checks. Answers sit tucked under each question.
80 kg active adult (1.2-1.6). Daily span?
80 x 1.2 = 96 g to 80 x 1.6 = 128 g.
Per meal over 4 meals at the middle of that span?
Middle is 112 g. 112 / 4 = 28 g per meal.
Questions
How much protein per day is enough?
Near 0.8 g per kg quiet, 1.2 to 1.6 active, 1.6 to 2.2 building muscle.
Is high protein bad for kidneys?
Not in healthy people per large reviews. Damaged kidneys follow doctor limits.
Does timing matter?
Less than total. A post workout serving helps, but daily total drives results.
What foods pack the most protein?
Meat, fish, eggs, dairy, soy, and legumes. A palm of chicken holds about 30 g.
Can vegetarians hit high targets?
Yes with soy, lentils, beans, dairy or eggs, and variety across the day.
What about protein while dieting?
Keep the high end of your range. It protects muscle while calories run low.