Whey protein powder: mL to Grams Conversion

70 mL of whey protein powder weighs approximately 39 g.

This refers to powder weight, not protein content.

At a density of about 0.56 g/mL, a typical 70 mL scoop of whey powder weighs ~39 g. The grams here are the weight of the powder itself; the actual protein is lower (see below).

Whey powder weight vs protein content

Weighing whey powder tells you how much powder you have — not how much protein. These are two different numbers:

• Powder weight. The total mass of powder. A 70 mL scoop is about 39 g of powder.
• Serving size. Brands define a serving by powder weight or by scoop, often around 30–40 g of powder.
• Protein per serving. Only part of that powder is protein. A 30 g serving of powder typically delivers roughly 20–27 g of protein, depending on formulation and brand.
• Same scoop, different protein. Two brands can use the same 70 mL scoop yet deliver different protein, because one may be a concentrate (~70–80% protein) and the other an isolate (~85–90%), or carry more added carbs and flavouring.

30 g of powder ≠ 30 g of protein. 30 g of whey powder may contain roughly 20–27 g of protein, depending on formulation and brand.

Why whey powder mL-to-grams values vary

Volume-to-weight for whey powder is not fixed. The grams behind a given mL shift with:

• Density differences. Whey powder is light and airy (≈ 0.56 g/mL), but the exact figure changes from product to product.
• Isolate vs concentrate. Isolates and concentrates have different particle size and density, so they pack differently.
• Flavoured vs unflavoured. Added cocoa, sweeteners and thickeners change the weight per mL.
• Scoop fill level. A heaped scoop weighs noticeably more than a leveled one.
• Compacted vs loose powder. Powder settles in the tub, so a scoop from a fresh tub weighs less than one pressed from a settled tub.

Whey powder mL to grams table

Values are grams of powder, not grams of protein.

Common scoop sizes

Typical whey scoops and their approximate powder weight:

Scoop sizes are not standardized — brands use anything from about 60 to 80 mL. Always check the scoop and serving size printed on your tub.

Whey protein mL-to-grams FAQ

How many grams is 70 mL of whey protein powder?

About 39 g. At a density of roughly 0.56 g/mL, a 70 mL scoop of whey protein powder weighs approximately 39 grams of powder — not 39 g of protein.

Does 30 g of whey powder equal 30 g of protein?

No. 30 g of whey powder is the weight of the powder. The protein in it is usually roughly 20–27 g, depending on whether it is a concentrate or isolate and how much flavouring or carbs it contains.

Why do scoop sizes differ between brands?

Scoops are not standardized. Each brand picks its own scoop volume (commonly 60–80 mL) to match its serving size, so two scoops of the same volume can hold different grams and different protein.

Is mL or grams more accurate for whey protein?

Grams. Volume (mL or scoops) changes with how packed or heaped the powder is, while a gram weight on a kitchen scale stays consistent. Weigh in grams for accurate macro tracking.

How much does one scoop of whey protein weigh?

A typical 70 mL scoop weighs about 39 g of powder. Smaller 60 mL scoops are around 34 g and larger 80 mL scoops around 45 g, but always check your product's label.