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How this protein calculator works
This free Australian protein calculator estimates how many grams of protein you need per day. It starts with the official Nutrient Reference Values for Australia and New Zealand, then lifts the target for age, training, and goal. It is an educational estimate, not medical advice.
Daily protein formula
The calculator uses a simple, published method:
Daily protein (g) = body weight (kg) Γ multiplier (g/kg)Imperial weights are converted to kilograms before the sum.
The multiplier is not one number. The floor is the Australian Recommended Dietary Intake. Activity, training style and goal then raise that floor toward a practical target. An upper figure is also shown so the result is a range, not a single rigid gram count.
What changes the number
About 0.75 g/kg for women and 0.84 g/kg for men. From 65 years the floor rises to about 1.0 g/kg. After 70 it can sit near 0.94β1.07 g/kg.
Light movement stays close to the floor. Regular lifting, mixed training or daily physical work moves the target toward 1.4β1.85 g/kg.
About 25% more protein than the training baseline. Extra protein helps keep muscle when calories drop.
About 40% more than the training baseline, usually landing near 1.6β2.2 g/kg for people who lift.
The calculator will not go below about 1.1 g/kg in pregnancy or 1.3 g/kg while breastfeeding.
Recommended intake is capped near 2.4 g/kg, and the upper range near 2.5 g/kg, so the result stays practical.
You will see three numbers: a minimum (deficiency floor), a recommended daily target, and an upper range. Most people should aim at the recommended figure and spread it across the day.
Why daily protein intake matters
Protein is not only a muscle food. It is used to build and repair muscle, skin, hair and connective tissue. It also supports immune function, enzymes, satiety, and recovery from training.
Most Australians meet the basic RDI. That RDI is a deficiency minimum. Active people, adults over 65, and anyone losing fat or gaining muscle often do better above that floor.
Australian protein RDI vs training targets
The National Health and Medical Research Council sets these Recommended Dietary Intakes:
- Adult women, 19β70 years: about 0.75 g per kg of body weight
- Adult men, 19β70 years: about 0.84 g per kg of body weight
- Adults over 70: about 0.94β1.07 g/kg to help slow age-related muscle loss
- Pregnancy and lactation: higher than the adult RDI
Sports nutrition research, including the International Society of Sports Nutrition position stand on protein and exercise, supports higher intakes for many people:
- Active adults: commonly 1.4β2.0 g/kg
- Muscle gain or hard training: often 1.6β2.2 g/kg
- Fat loss while keeping muscle: often 1.6β2.4 g/kg
This calculator starts at the Australian RDI, then lifts the target for how you train and eat. The result is a working daily number, not the lowest legal minimum.
High-protein foods in Australia
Use whole food first. Chief products are there for the days meals slip. Chief figures below are typical per-serve values from Australian nutrition labels.
| Food | Typical serve | Protein |
|---|---|---|
| Chicken breast, cooked | 100β150 g | 30β45 g |
| Lean beef or lamb, cooked | 100 g | 30β35 g |
| Chief Organic Biltong | 30 g bag | 13.2β14.1 g |
| Chief Organic Beef Bar | 40 g bar | 16.9β18.4 g |
| Salmon or tuna, cooked or canned | 100β150 g | 25β35 g |
| Eggs | 2 large | 12β14 g |
| Greek yoghurt, plain | 200 g | 15β20 g |
| Cottage cheese | 100β150 g | 12β20 g |
| Firm tofu | 150 g | 15β20 g |
| Lentils or chickpeas, cooked | 1 cup | 15β18 g |
| Chief whey or collagen powder | 1 labelled serve | 11.2β24 g |
| Chief Meal Shake | 60 g serve | 31 g |
Spread animal and plant sources across the day. A shake, collagen bar, biltong bag or beef bar is useful when you are short a serve, not as the whole diet.
How to hit your daily protein target
Aim for 20β40 g at each main meal, plus a protein snack. Muscle protein synthesis responds better to pulses than one huge dinner.
Eggs, yoghurt, beef, chicken, fish or legumes. Build the rest of the meal around that.
Busy days are where targets slip. A labelled Chief serve can close a 15β30 g gap without another cooked meal.
If you also track calories or carbs, get this protein number first, then check meals in Chiefβs macro calculator.
Protein calculator FAQs
Is the Australian RDI enough if I exercise?
No, not usually. The RDI prevents deficiency. People who lift, run or train most weeks commonly land at 1.4β2.0 g/kg. This calculator raises the target when you log training.
How much protein do I need per day in Australia?
Start with 0.75 g/kg if you are a woman or 0.84 g/kg if you are a man. Add more for training, fat loss, muscle gain or age over 65. Use the calculator above for a personalised gram target.
Can I eat too much protein?
For healthy kidneys, intakes inside this calculatorβs range are generally considered acceptable. Existing kidney disease is different. Follow your clinician.
Do I need protein powder, bars or biltong?
No. Whole food can cover the day. Chief products exist because most people miss the target on short or busy days. Keep convenience protein around a third of the daily total.
Should adults over 65 eat more protein?
Yes. Many experts recommend at least 1.0β1.2 g/kg after 65 to counter anabolic resistance and protect muscle and strength. The calculator applies that higher floor automatically when you enter age 65 or over.
How do I use this with the Chief macro calculator?
Set your daily protein target here first. Then use the recipe macro calculator to see whether breakfast, lunch and dinner actually add up.
Sources
- National Health and Medical Research Council. Nutrient Reference Values for Australia and New Zealand, protein.
- Dietitians Australia. Protein guidance for the general population.
- Australian Dietary Guidelines, Eat For Health.
- JΓ€ger, R. et al. International Society of Sports Nutrition position stand: protein and exercise.
- Harvard Health Publishing. Overview of dietary protein intake.
This page is an estimate only. Actual needs vary with body composition, training, total calories and health conditions. It is not individual dietary or medical advice. If you have kidney disease or another condition that changes protein needs, talk to your doctor or an Accredited Practising Dietitian.