Whey Protein Serving Sizes: How Much Protein Per Shake?
By ProSupps: Sports Nutrition & Workout Supplements | Published: 2026-10-16
Category: How-to Guides
Learn how to set your whey protein serving size by body weight and training load, with a step-by-step method to dial in grams per shake and scoops per day.
Quick answer
Start with 1 scoop (about 24g protein) per shake and adjust your daily total to roughly 1.6–2.2g protein per kg of body weight. If you weigh 80kg, that's 128–176g daily; use shakes to cover the gap your meals leave, not as a fixed number.
Scoops vs. grams: why the label matters more than the scoop
Scoop sizes vary by brand, so the number of scoops is a rough measure at best. The reliable number is grams of protein per serving on the nutrition panel. For example, ProSupps Whey Protein delivers 24g per scoop, so two scoops give 48g. Always check the panel before you plan your day, and use a kitchen scale for the first few servings if you want to calibrate your scoop.
How to set your daily protein target before you pour a shake
Your total daily protein needs depend on body weight and training volume. A common range for active lifters is 1.6–2.2g per kg of body weight. Multiply your weight in kg by that range to get a daily target, then subtract what you already eat from whole foods. The remainder is your shake budget. For a 70kg lifter eating 100g from meals, that's 12–54g left to cover with shakes—usually one to two servings.
Timing and portion size around training
A shake is most useful when it fills a gap you can't cover with food, such as within an hour after training or when you're short on time. A single 24g serving is a practical post-workout portion for most people. If you train fasted or have a small appetite, a half-serving (12g) can be easier to digest. There's no need to force a huge shake if your next meal is close.
Adjusting for goals: cutting, maintaining, or gaining
When cutting calories, keep protein high and use shakes to protect muscle—one scoop in water is a low-calorie way to hit your target. When gaining, add a scoop to milk or a smoothie for extra calories and protein. If you're maintaining, one shake per day is often enough to cover the gap. Track your weight and performance for two weeks, then adjust by half a scoop at a time.
Step-by-step: dial in your whey protein serving size
- Weigh yourself and set a daily protein target: Convert your body weight to kilograms and multiply by 1.6–2.2 to get a daily range. Example: 80kg × 1.6–2.2 = 128–176g per day. Checkpoint: write the target down before you scoop anything.
- Estimate protein from meals, then find the gap: Add up typical protein from breakfast, lunch, dinner, and snacks. Subtract that from your daily target. The difference is what shakes need to cover. Common mistake: assuming you need a shake at every meal instead of filling an actual gap.
- Read the label and calculate grams per scoop: Find grams of protein per serving on the nutrition panel. For ProSupps Whey Protein, that's 24g per scoop. Divide your gap by that number to get scoops per day. Checkpoint: if the label says 24g, a 48g gap means two scoops total, not two scoops per shake.
- Start with one scoop per shake and adjust: Begin with a single 24g serving per shake. If you're still short on your daily total after a week, add a half scoop to one shake or add a second shake. Common mistake: jumping straight to double scoops and feeling bloated or overspending on protein.
- Track for two weeks, then fine-tune: Monitor recovery, hunger, and scale weight. If weight is stable and recovery is good, your serving size is working. Adjust by half a scoop at a time if needed. Next step: once dialed in, keep your scoop in the tub so you don't have to recalculate daily.
Product facts to ground your serving math
- Whey Protein: ProSupps Whey Protein provides 24g of premium whey protein per scoop and is formulated for intense athletic training. This gives you a fixed 24g unit to count toward your daily target, so you can plan shakes without guessing.
