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# Whey vs Casein Price Per Gram of Protein: Which Is Cheaper?

Both come from milk, but your body digests them differently. [Whey](https://www.supplementmath.com/protein-powder/us/index.md?proteinType=whey-concentrate) absorbs fast—great after a workout. [Casein](https://www.supplementmath.com/protein-powder/us/index.md?proteinType=casein) absorbs slowly—great before bed. Which one costs less per gram of protein?

## So Which Is Cheaper?

Whey costs $3.77/100g of protein on average \($0.038/gram\). Casein costs $7.32/100g \($0.073/gram\)—that's 94% more. For everyday use, whey gives you more protein per dollar. Casein's slow-release is useful before bed, but you pay extra for it.

## What We Mean By "Price Per Gram of Protein"

Important: We calculate price per gram of actual protein content, not price per gram of powder.

A 30g scoop of protein powder might contain only 24g of protein \(the rest is fillers, flavors, and moisture\). We compare products based on that 24g—the protein your body actually uses.

This is the true cost of protein powder. Price per gram of powder is misleading because products have different protein concentrations.

 [Read more about our methodology →](https://www.supplementmath.com/protein-powder/learn/price-per-100g-protein/index.md)

## The Quick Version

Whey and casein are both milk proteins, but your body digests them differently. That affects when you should use each—and how much you'll pay.

### Whey Protein

- Average price: $3.77/100g of protein \($0.038/gram\)
- Price range: $0.03-0.15 per gram of protein
- Absorption: Fast \(30-60 minutes\)
- Best time: Post-workout, morning
- Texture: Mixes easily, thinner
- Availability: 5 products to choose from

### Casein Protein

- Average price: $7.32/100g of protein \($0.073/gram\)
- Price range: $0.06-0.10 per gram of protein
- Absorption: Slow \(6-8 hours\)
- Best time: Before bed, long gaps between meals
- Texture: Thicker, can be clumpy
- Availability: 4 options

## Price Comparison: The Numbers

Let's put it side by side. We analyzed 9 US market products to find the real cost per gram of protein.

 | Metric | Whey | Casein | Difference |
| --- | --- | --- | --- |
| Cost per gram of protein | $0.038 | $0.073 | \+94% |
| Cost per 100g of protein | $3.77 | $7.32 | \+94% |
| Absorption time | 30-60 minutes | 6-8 hours | Much slower |
| Product availability | 5 options | 4 options | Less choice |
| Mixability | Excellent | Fair to poor | Can be clumpy |

## What the Price Difference Means Over a Year

That 94% premium might seem small, but it adds up. Let's say you consume 100g of protein powder daily \(about 4 scoops for most people\). Here's what the price difference means annually:

### Whey Protein \(Annual\)

- Daily cost: $3.77 \(100g of protein at $0.038/g\)
- Weekly cost: $26.39
- Annual cost: $1376.30

### Casein Protein \(Annual\)

- Daily cost: $7.32 \(100g of protein at $0.073/g\)
- Weekly cost: $51.23
- Annual cost: $2671.29

The difference: Choosing whey saves you $1295 per year if you use 100g of protein powder daily. Even at 50g daily, you're still saving $647/year.

### Calculate Your Own Cost Per Gram of Protein

Use our free calculator to find the price per gram of protein for any protein powder.

 [Protein Price Per Gram Calculator →](https://www.supplementmath.com/protein-powder/learn/protein-calculator/index.md)

## Best Value Whey Proteins

These whey products give you the most protein for your money:

 [NOW Sports Whey Protein Isolate $2.48/100g protein](https://www.supplementmath.com/protein-powder/us/now-sports/whey-protein-isolate-vanilla-b000mak5a8/index.md)[Kirkland Signature Whey $3.71/100g protein](https://www.supplementmath.com/protein-powder/us/kirkland/signature-whey-chocolate-b0d8k65g3v/index.md)[Animal 100% Whey Protein Powder $3.92/100g protein](https://www.supplementmath.com/protein-powder/us/animal/100-whey-protein-powder-chocolate-b0brwsvpsq/index.md)[Dymatize Elite 100% Whey Protein Powder $4.19/100g protein](https://www.supplementmath.com/protein-powder/us/dymatize/elite-100-whey-protein-powder-vanilla-b00eacshf4/index.md)[Optimum Nutrition Gold Standard 100% Whey Protein Powder $4.55/100g protein](https://www.supplementmath.com/protein-powder/us/optimum-nutrition/gold-standard-100-whey-protein-powder-vanilla-ice-cream-b07ctwp576/index.md)

## Available Casein Products

Casein options are limited, but here's what's available:

 [NAKED Casein Protein $6.27/100g](https://www.supplementmath.com/protein-powder/us/naked/casein-protein-vanilla-b01dtwxm3c/index.md)[BSN Syntha-6 Ultra Premium Protein Matrix $6.54/100g](https://www.supplementmath.com/protein-powder/us/bsn/syntha-6-ultra-premium-protein-matrix-chocolate-b002dyj1ec/index.md)[NAKED Casein Protein $7.06/100g](https://www.supplementmath.com/protein-powder/us/naked/casein-protein-vanilla-b0f1dj991v/index.md)[Dymatize Super Mass Gainer $9.41/100g](https://www.supplementmath.com/protein-powder/us/dymatize/super-mass-gainer-vanilla-b0020xqwca/index.md)

## When to Pick Whey

### Right After Training

Your muscles absorb nutrients quickly after training. Whey enters your bloodstream in 30-60 minutes, delivering amino acids when they're needed most. This is why whey works well post-workout.

### First Thing in the Morning

You haven't eaten for 8\+ hours. Whey breaks that fast quickly and gets protein to your muscles. It's also easier to drink first thing—casein can be thick when you're just waking up.

### Budget Matters

At $3.77/100g of protein \($0.038/gram\) on average, whey costs less. If you buy protein regularly, that 94% savings adds up. Over a year, you save hundreds of dollars.

## When Casein Makes Sense

### Before Bed

Casein forms a gel in your stomach and releases amino acids over 6-8 hours. This feeds your muscles while you sleep. If you train hard and can afford it, bedtime casein helps.

### Long Days Without Meals

Some schedules make regular eating difficult. Casein's slow release helps during long gaps between meals. A balanced meal would be better and cheaper, but casein works when you can't eat real food.

## The Bottom Line

Most people don't need casein. Whey works fine post-workout, and whole food meals cover the rest of your day. If you're training at a level where nighttime protein timing matters, you already know it.

For everyone else: buy whey, hit your daily protein target, and move on. The difference between whey and casein matters less than hitting your protein goals consistently.

## Frequently Asked Questions

### How much does whey vs casein cost per gram of protein?

Whey protein costs $0.038/gram of protein on average \($3.77/100g\), with prices ranging from $0.03-0.15/gram depending on brand and quality. Casein costs $0.073/gram \($7.32/100g\) on average, ranging from $0.06-0.10/gram. Casein costs about 94% more per gram than whey. For someone consuming 100g of protein powder daily, that's a difference of about $1295 per year.

### How much more does casein cost per year?

Based on average prices \($0.038/g for whey vs $0.073/g for casein\), using 100g of protein powder daily costs about $1376/year for whey vs $2671/year for casein. That's a difference of $1295 annually. Even at 50g daily, you're still paying $647 more per year for casein. Whether that's worth it depends on your goals—bedtime protein feeding may justify the cost for serious athletes, but most people will save money with whey.

### Is casein protein worth the extra cost?

Casein costs about 94% more per gram of protein than whey \($0.073/g vs $0.038/g\), which translates to roughly $1295 more per year if you use 100g daily. However, casein absorbs slowly over 6-8 hours, making it useful before bed or when you know you won't eat for a while. If you're looking for post-workout nutrition or everyday use, whey gives you more protein for your money.

### Can I mix whey and casein together?

Yes. Many people mix them to get both fast and slow-digesting protein. Post-workout, whey alone is fine since you want quick absorption. Before bed, casein alone works better. The blend approach is more about convenience than science—you'd get similar results taking them separately.

### Does casein build more muscle than whey?

No. When total daily protein intake is the same, both types produce similar muscle growth. Casein's slower absorption doesn't make it better or worse—just different timing. Whey is ideal after training, casein is ideal before long periods without food.

### Why are there so few casein products available?

Casein is thicker and mixes poorly compared to whey, making it less popular for shakes. It's also more expensive to produce—at $0.074/gram vs $0.065/gram for whey. Most companies focus on whey because it's what most customers want. Casein has its place, but it's a niche product with only 4 options in our database vs 5 whey options.

### Is casein better for weight loss than whey?

Casein can help you feel full longer due to slow digestion, which is useful when cutting calories. But the difference isn't huge—whey also has satiety benefits. For weight loss, total calorie deficit matters more than protein type. Pick whichever fits your budget and schedule.

## Compare All Products

Use our comparison tool to filter by protein type and see the price per 100g protein for all products.

 [Browse All Protein Products](https://www.supplementmath.com/protein-powder/us/index.md)

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