Protein Quality Score Calculator
Check the real value of your protein, not just the grams on the label
Protein Information
Protein Quality Score
Based on efficiency, purity, value, and bioavailability
Your powder ranks in the top tier: excellent purity and absorption.
Score Breakdown
🧬 How Our Protein Quality Calculator Works
The DrinkDigits Protein Quality Calculator helps you find the best protein powder for your goals — instantly. It uses science-based formulas to rate your protein by efficiency, purity, value, and bioavailability, producing a single Protein Quality Score (0–10) that's easy to read and compare.
⚙️ What the Calculator Measures
1. Protein Efficiency (35%)
How effectively calories convert into usable protein.
Formula: (Protein × 4) ÷ Calories
Higher = leaner, more efficient nutrition.
2. Protein Purity (25%)
Ratio of protein to total macros.
Formula: Protein ÷ (Protein + Carbs + Fat)
High purity means fewer fillers and more active nutrition.
3. Value for Money (20%)
Measures protein grams per dollar spent.
Adjusted for modern pricing (18g per $1 = top score).
Optional input — leave blank if you don't want price to affect the score.
4. Bioavailability (20%)
How efficiently the body digests and absorbs protein.
| Protein Type | Bioavailability |
|---|---|
| Whey Isolate | 98% |
| Whey Concentrate | 94% |
| Casein | 90% |
| Egg White | 95% |
| Soy | 91% |
| Pea | 89% |
| Rice | 87% |
| Collagen | 80% |
| Blend | 88% |
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Each factor is weighted and combined to produce your Protein Quality Score. You'll see a visual gauge, breakdown bars, and clear insight text explaining strengths or weaknesses.
🧩 Why It's Reliable
- Based on verified nutritional science and PDCAAS bioavailability data.
- Automatically rebalances weights when price is missing.
- No brand bias — results rely purely on your entered data.
- Adjusted for 2025 supplement market pricing to remain fair and accurate.
💰 Price & Market Reality
The Value for Money score reflects protein grams per dollar, not total cost. It shows efficiency — how much real protein you're getting for every dollar spent.
Recent (2025) supplement market averages:
| Protein Type | Typical Price/Serving (USD) | Market Insight |
|---|---|---|
| Whey Isolate | $1.75 – $2.25 | Highest purity; most expensive due to microfiltration |
| Whey Concentrate | $1.25 – $1.75 | Affordable, includes some fats/carbs |
| Casein | $1.50 – $2.00 | Slow digesting; premium micellar versions cost more |
| Egg White | $1.60 – $2.10 | High absorption; limited supply drives price |
| Soy | $1.20 – $1.80 | Budget plant-based option |
| Pea | $1.10 – $1.60 | Popular vegan protein, moderate purity |
| Rice | $1.00 – $1.40 | Often blended for amino balance |
| Collagen | $1.50 – $2.30 | Lower protein yield per scoop |
| Blend | $1.30 – $1.90 | Balanced cost and absorption |
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🌎 Prices reflect verified 2025 averages across major U.S. and global retailers. Ingredient, testing, and logistics costs have increased by 20–35% since 2023.
Scoring Adjustment:
The calculator now treats 18 g protein per $1 as the top benchmark for "10/10" Value. Products above that still achieve full marks — so higher-priced isolates aren't unfairly penalized.
