Estimate daily protein intake from body measurements and activity level
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Protein supports muscle repair, tissue maintenance, immune function, enzymes, and hormones. For many adults, getting enough protein helps with recovery after exercise, maintaining lean body mass, and staying fuller for longer.
This calculator estimates protein needs using several factors:
Complete protein sources include lean meat, fish, eggs, dairy, soy foods, and some mixed meals. Plant-based diets can still meet protein needs by including varied protein sources such as beans, lentils, tofu, nuts, seeds, and grains.
For many people, spreading protein across the day works well. Aiming for protein at each meal can support satiety, recovery, and muscle protein synthesis more effectively than eating most of it in one sitting.
Protein is one of the most important nutrients for muscle maintenance, recovery, appetite control, and overall health. This protein calculator helps estimate a sensible daily protein target based on weight, age, activity level, and body measurements.
Getting enough protein each day can help with:
A protein intake calculator is useful because protein needs are not the same for everyone. A sedentary adult may need much less than an athlete or someone dieting while trying to preserve muscle.
This calculator estimates protein needs using:
This gives a practical daily target in grams, rather than a generic one-size-fits-all answer.
| Category | Recommended Intake |
|---|---|
| Sedentary adults | 0.8 g/kg/day |
| Lightly active adults | 1.0 g/kg/day |
| Moderately active adults | 1.2 g/kg/day |
| Active adults | 1.4 g/kg/day |
| Very active or athletes | 1.6–1.8 g/kg/day |
Higher protein intake is often helpful during a calorie deficit because it can support fullness and help preserve lean muscle mass. For many people dieting, protein targets in the upper part of the recommended range are more useful than the bare minimum.
When training for hypertrophy or strength, protein helps support muscle repair and growth. Lifters and active gym-goers often aim for a moderate-to-high protein intake alongside consistent training.
Older adults can benefit from slightly higher protein intake to support strength, function, and healthy ageing. This calculator raises estimates for older age groups to reflect that.
Athletes and highly active people often need more protein than the general population. Endurance training, strength training, and high training volumes can all increase protein requirements.
Meeting protein needs is easier when meals include reliable protein sources.
Rather than eating most protein in one meal, many people do well by spreading intake across breakfast, lunch, dinner, and snacks. This can help with appetite control and muscle protein synthesis.
| Women | Useful for general health, fat loss, and active lifestyles |
| Men | Useful for muscle gain, performance, and daily intake planning |
| Older adults | Helpful for protecting muscle mass and supporting healthy ageing |
| Athletes | Useful for recovery, adaptation, and performance support |
| Vegetarians and vegans | Helpful for structuring protein intake from plant-based foods |
A good protein target is not about chasing the highest possible number. It is about matching intake to body size, training demands, age, and goals. This calculator offers a useful estimate that can act as a starting point for daily planning.
Use the protein calculator above to estimate daily intake, then explore related tools like the BMI Calculator, Fasting Calculator, and Age Calculator.
It depends on body weight, activity level, age, and goals. Many adults fall somewhere between 0.8 and 2.2 grams per kilogram per day.
Yes. It adjusts for higher activity levels that are common in strength training and endurance sport.
Yes. Higher protein intake often helps preserve muscle mass and support appetite control during fat loss phases.