Protein Cost Calculator
By Mustafa Bilgic · Updated 21 August 2026
Protein powder looks cheap per serving until you compare it gram-for-gram against eggs, chicken thighs, or canned tuna. The calculator above does that comparison: enter a food's price and its protein content per 100 grams, and it shows the cost per 25-gram protein serving so you can rank your options by actual value, not marketing claims.
Enter your own grocery prices and nutrition-label protein values for an accurate comparison. Default figures in the calculator are illustrative. Protein quality (amino acid completeness, digestibility) is a separate consideration from cost -- this tool focuses purely on dollars per gram.
Why Cost Per Gram Beats Cost Per Package
A $30 tub of whey protein containing 75 servings of 25g protein works out to $0.40 per 25g serving. A $5 carton of 18 eggs with roughly 6g protein per egg (108g total) costs about $1.16 per 25g serving. Whey wins on pure cost-per-gram in this scenario, but eggs deliver micronutrients, fats, and satiety that a shake does not. The calculator gives you the cost comparison; the rest depends on your priorities.
Package sizes and unit pricing at the grocery store are designed to make comparison difficult. A 500g block of cheese and a 1 kg bag of frozen chicken breasts are not comparable by sticker price. Converting both to cost-per-25g-of-protein puts them on the same axis.
This matters most on a tight budget. Students, young athletes, and anyone managing food costs alongside training goals can use this tool weekly when planning grocery runs. Small differences per serving multiply across 4-6 protein-rich meals per day, 7 days a week.
Reading Nutrition Labels for Accurate Input
Flip the package over and find the "per 100g" column on the nutrition panel. That protein figure goes directly into the calculator. If your label only shows "per serving," divide the protein per serving by the serving size in grams and multiply by 100 to convert. Getting this number right is the difference between a useful comparison and a misleading one.
Watch for labels that include collagen or gelatin as part of the protein count. These are incomplete proteins that do not support muscle synthesis the way whey, casein, egg, or meat protein do. A bar listing 20g protein but sourcing half from collagen delivers only about 10g of muscle-relevant protein. The calculator cannot detect this -- you need to check the ingredient list.
Cooked vs raw weight also matters. Raw chicken breast has about 23g protein per 100g; cooked, it concentrates to roughly 31g per 100g because water evaporates. Use the raw figure if you weigh food before cooking (as most meal-prep approaches do), or the cooked figure if you weigh after. Just be consistent across all entries.
Budget Protein Sources That Perform
Canned tuna, whole eggs, dried lentils, cottage cheese, and frozen chicken thighs consistently rank among the cheapest protein sources per gram in U.S. grocery stores. Prices vary by region and season, so your actual ranking will differ -- which is exactly why the calculator exists. Run your local prices through it each month.
Greek yogurt and milk score well when bought in larger containers. A single-serve flavored Greek yogurt costs several times more per gram of protein than a 32-ounce plain tub of the same brand. The calculator reveals these gaps that brand marketing works hard to obscure.
Plant-based protein (lentils, chickpeas, peanut butter) is often the cheapest per gram in absolute terms, but comes with higher carbohydrate and fat loads per protein gram. If you are tracking macros tightly, the calculator helps you see the cost tradeoff between a pure protein source and one that brings calories you may not want.
Timing Purchases Around Price Cycles
Meat prices follow predictable cycles. Chicken and pork tend to be cheapest in the weeks after major holidays when demand drops. Beef follows cattle market cycles that shift seasonally. Buying in bulk when prices dip and freezing extends the savings across months.
Protein powder goes on sale during fitness-industry promotional periods -- January (New Year), late spring (summer prep), and Black Friday. Stacking a sale with a bulk size can cut cost-per-serving by 20-30% compared to buying a small tub at full price mid-year.
Canned and dried goods (tuna, beans, lentils) are shelf-stable and almost always cheaper in multi-packs. If storage is available, buying a case at the lower unit price locks in the cheapest per-gram protein available. Run the bulk price through the calculator to confirm the actual savings before committing fridge or pantry space.
Frequently asked questions
How do I calculate cost per 25g of protein?
Divide the total price of the food by its total protein in grams to get cost per gram, then multiply by 25. For example, a $5 pack with 100g total protein costs $0.05 per gram, or $1.25 per 25g serving. The calculator does this automatically when you enter price and protein-per-100g.
Should I use raw or cooked weight for meat?
Use whichever matches how you weigh your food. Raw chicken breast has about 23g protein per 100g; cooked is closer to 31g per 100g due to water loss. Pick one method and apply it consistently across all foods you compare.
Is protein powder always the cheapest source?
Not always. Whey concentrate and canned tuna often compete for the top spot depending on brand and sale prices. Eggs, cottage cheese, and dried lentils can beat powder in some markets. The calculator exists specifically because the answer changes with your local prices.
Does cheaper protein mean lower quality?
Not necessarily. Eggs, canned fish, and cottage cheese are among the cheapest and also among the highest-quality complete protein sources. Price often reflects packaging, branding, and convenience more than protein quality. Check the amino acid profile if quality is your concern.