Protein Intake Formula Explained, With Examples
Every protein intake result comes from one formula. Once you understand what goes into it, you can sanity-check any figure you are given, whether by an employer, a bank, a teacher or another website.
The formula
Protein = weight × grams per kg.
What each input means
- Weight (kg): the value you enter in the calculator.
- Goal: choose from General health, Active, Muscle gain, Intense training.
Example
For example, with these inputs:
- Weight (kg): 70
- Goal: Muscle gain
the calculator returns:
- Daily protein: 112 g
How the result changes
The table keeps the other inputs at their example values and changes weight (kg).
| Weight (kg) | Daily protein |
|---|---|
| 70 | 112 g |
| 35 | 56 g |
| 52.5 | 84 g |
| 87.5 | 140 g |
| 105 | 168 g |
Why it matters
Health numbers are most useful when you track them consistently. A quick calculation turns everyday measurements into something you can act on, whether that is planning meals, training for a run or preparing for a clinic visit.
Simple measurements such as weight, height and waist circumference are widely used to screen for health risks because they are cheap and easy to repeat. They are not diagnoses, but tracked over time they show whether lifestyle changes are working.
Energy needs depend on age, sex, size and activity. Formulas such as Mifflin-St Jeor estimate resting needs, and an activity multiplier turns that into daily needs. Real requirements vary by a few hundred calories, so adjust based on how your weight changes over several weeks.
Singapore's tropical climate means you lose more fluid through sweat, even when you are not exercising. Thirst, urine colour and how you feel are good guides, and needs rise during outdoor activity or heat waves.
Related calculations
- Waist-to-Height Ratio Calculator: A ratio above 0.5 suggests increased health risk.
- Steps to Kilometres Calculator: Converts step counts (like your Healthy 365 tracker) to distance.
- Running Pace Calculator: Calculates pace for runs like the Standard Chartered Marathon or IPPT 2.4 km.
- Calories Burned Calculator: Estimates calories burned with MET values.
Use the Protein Intake Calculator to plug in your own numbers.
Run your own numbers: Protein Intake Calculator