25g of powder isn’t 25g of protein: a practical portion guide

The weight you put in your shaker and the protein it supplies are two different numbers. Here’s how to read them, measure a portion and work out how long your pack will last.

Commercial disclosure: The Health Improvers sells the products used in these examples. Figures were checked against our current product information on 16 October 2026.

Start with these three numbers

Look for the net weight of the pack, the weight of one serving and the protein in that serving. A 500g pack describes the total weight of powder. A 25g serving describes the amount of powder used. The protein line tells you how much protein that amount supplies.

For example, our Pea Protein supplies 18.1g of protein per 25g serving. Our Chocolate Rice Protein supplies 16.9g per 25g serving. The serving weights match, but the protein amounts differ. Neither serving contains 25g of protein.

These figures describe the powder alone. If you mix it with a drink or other ingredients, their nutritional contribution is additional. Check those labels separately.

How long does a 500g pack last?

Divide the pack weight by the serving weight:

500g ÷ 25g = 20 servings

At one 25g serving each day, that is 20 days. At one serving on five days each week, it is four weeks. These are stock-planning examples, not recommendations about how often you should use a product.

A 30g portion gives a different result: 500g ÷ 30g is about 16.7. That means 16 full 30g servings and 20g left over. Our Hemp Protein page describes the pack as 16 servings. Do not count the remainder as another full serving.

Measure the powder, not just the scoop

Check the serving weight in grams on your own pack. Do not assume a scoop from one powder measures the right portion of another.

1. Put your empty shaker or bowl on kitchen scales.
2. Reset the scale to zero.
3. Add the amount of powder specified in the product directions.
4. Add your other ingredients and prepare it as directed.

Use the current pack directions if your product information differs from an older article or image. This guide explains the numbers; it does not set a personal protein target.

Using powder in a recipe? Count the whole batch first

A recipe’s weight of protein powder is not its protein total. To calculate the powder’s contribution, divide the amount used by the labelled serving weight, then multiply by the protein per serving.

For an arithmetic example, 50g of our Pea Protein is two 25g servings, supplying 36.2g of protein from the powder. If a batch is divided evenly into ten portions, that is 3.62g per portion from the powder. The other ingredients need their own calculation.

This calculation does not establish that our powder works in a particular recipe. Follow a tested recipe, check ingredient suitability and observe the product’s directions.

Before you choose

Protein quantity is one comparison, alongside ingredients, flavour, allergens and product-specific cautions. Our Chocolate Rice Protein contains caffeine from guarana and green tea; read its directions and warnings before use.

For a wider comparison, read Pea, hemp and rice protein compared. To check the rest of a supplement label, use our line-by-line label guide.

Always follow the current product label. Food supplements should not replace a varied diet and healthy lifestyle.

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