How Much Protein Do I Need Per Day?
Free Daily Protein Calculator
Not sure how much protein you need? Let's calculate it based on Australian guidelines + activity/goals.
Need convenient high-quality protein? Try our snacks & supplements
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Estimates based on Australian Nutrient Reference Values, Dietitians Australia, and sports nutrition research (e.g. ISSN). Not medical advice. Consult a professional for personal needs.
Next, figure out the protein in your meals
Now you know how much protein you need, the next step is to figure out how much protein there is in your meals.
How This Protein Calculator Works (Methodology)
This calculator provides personalised estimates of daily protein needs based on established nutritional guidelines. It is for educational purposes only.
Core Formula
Daily Protein (g) = Body Weight (kg) × Multiplier (g/kg)
We convert inputs to kilograms where needed and apply evidence-based multipliers adjusted for age, activity level, goal, and life stage.
Key Adjustments & Sources
- Baseline (AU-focused): Starts from Australian Nutrient Reference Values (NRVs) and Dietitians Australia recommendations — approximately 0.75 g/kg for women and 0.84 g/kg for men. Higher baseline (~1.0 g/kg) for adults over 65 to support muscle maintenance.
- Activity Level: Scaled upward for exercise (1.2× for light activity up to ~1.85× for athletes), consistent with sports nutrition research.
- Goal:
- Maintenance / General Health: Standard range
- Weight Loss: +25% to help preserve muscle during calorie deficit
- Muscle Gain: +40% to support hypertrophy
- Pregnancy / Lactation: Additional increases (up to ~1.1–1.2 g/kg or higher) per health authority guidelines.
- Ranges Shown: Minimum (conservative baseline), Recommended (optimal target for most users), and Upper (ambitious but evidence-supported ceiling). We generally cap at ~2.5 g/kg to stay practical and safe.
📚 Full Sources & References
- National Health and Medical Research Council (NHMRC) – Nutrient Reference Values for Australia and New Zealand (Protein)
- Dietitians Australia – Protein Guidance
- Australian Dietary Guidelines (Eat For Health)
- International Society of Sports Nutrition (ISSN) Position Stand: Protein and Exercise (2017/updated reviews)
- Harvard Health Publishing – Protein Intake Overview
- Additional context from recent reviews on protein for ageing, weight management, and muscle protein synthesis
This tool blends official Australian guidelines with practical recommendations from sports nutrition research to give balanced, actionable targets.
Individual needs vary. Factors like total calorie intake, body composition, training type, and health conditions can influence optimal intake. Always consult a doctor or registered dietitian for personalised advice, especially if you have kidney issues or other medical conditions.
Why Protein Matters
Protein is more than just a “muscle food.” It is essential for:
- Building and repairing muscle, skin, hair and connective tissue
- Supporting immune function and enzyme production
- Keeping you fuller for longer (high satiety)
- Preserving muscle during weight loss or ageing
- Recovering from training and everyday activity
Most Australians meet the basic minimum, but many active people, older adults, and those trying to lose fat or gain muscle benefit from higher intakes.
Australian Guidelines vs Optimal Targets
The official Australian Nutrient Reference Values (NRVs) set these Recommended Dietary Intakes (RDIs):
- Adult women (19–70 years): ~0.75 g per kg of body weight
- Adult men (19–70 years): ~0.84 g per kg of body weight
- Adults over 70: Higher (approx. 0.94–1.07 g/kg) to help combat age-related muscle loss
- Pregnancy and lactation: Increased needs
These figures are designed to prevent deficiency in the general population. Sports nutrition research (including the International Society of Sports Nutrition) consistently shows higher intakes are beneficial for many people:
- Active adults / regular exercisers: 1.4–2.0 g/kg
- Muscle gain or intense training: Often 1.6–2.2 g/kg
- Weight loss (to preserve muscle): Frequently 1.6–2.4 g/kg or higher relative to body weight
Our calculator starts from the Australian baseline and adjusts upward based on your activity level and goal so you get a practical target rather than just the minimum.
High-Protein Foods (Approximate Values)
Here are common Australian foods and their protein content. Values are approximate and based on typical cooked or ready-to-eat serves.
| Food | Typical Serve | Protein (g) |
|---|---|---|
| Chicken breast (cooked) | 100–150 g | 30–45 g |
| Lean beef or lamb | 100 g cooked | 30–35 g |
| Chief Organic Biltong | 1 serve (as per pack) | 14+ g |
| Chief Organic Beef Bars | 1 bar | 16–18 g |
| Salmon or tuna (cooked/canned) | 100–150 g | 25–35 g |
| Eggs | 2 large | 12–14 g |
| Greek yoghurt (plain) | 200 g | 15–20 g |
| Cottage cheese | 100–150 g | 12–20 g |
| Firm tofu | 150 g | 15–20 g |
| Lentils or chickpeas (cooked) | 1 cup | 15–18 g |
| Whey or collagen protein | 1 serve (as per label) | 11–23 g+ |
Tip: Combining animal and plant sources across the day makes it easier to hit higher targets. Convenient options like Chief Biltong, Chief Beef Bars, or Chief whey/collagen powders can fill gaps when you’re busy.
Practical Tips to Hit Your Daily Protein Target
- Spread it out — Aim for 20–40 g of protein at each main meal and include a protein-rich snack. Muscle protein synthesis responds best when protein is distributed throughout the day.
- Prioritise quality — Complete proteins (meat, fish, eggs, dairy, whey) provide all essential amino acids. Plant proteins work well when varied.
- Make it convenient — Keep high-protein snacks, Greek yoghurt, eggs, or ready-to-drink options on hand for busy days.
- Track for a week — Use our free recipe macro calculator to see how your current meals stack up, then adjust.
- Don’t fear higher numbers — For most healthy people, intakes in the 1.6–2.2 g/kg range are well-tolerated and beneficial when training or dieting.
Frequently Asked Questions
Is the Australian RDI enough if I exercise?
The RDI prevents deficiency but is often too low for people who train regularly. Active individuals commonly benefit from 1.4–2.0 g/kg or higher depending on goals.
Can I eat too much protein?
For healthy people with normal kidney function, higher protein intakes within the ranges used in this calculator are generally safe. Those with existing kidney disease should follow medical advice.
Do I need protein powder or snacks?
Not necessarily — whole foods can cover your needs. However, high-quality protein powders, bars, or snacks make it much easier to hit targets consistently, especially on busy days or when appetite is low.
Should older adults eat more protein?
Yes. Many experts recommend 1.0–1.2 g/kg or higher for adults over 65 to help counteract anabolic resistance and support muscle and strength.
How should I use this calculator with the macro calculator?
First get your daily protein target here. Then use our free recipe macro calculator to check the protein content of your meals and snacks so you can adjust easily.