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How Many Calories Are in a Protein Smoothie?

By Smoothie Nutrition Calculator · Updated 2026 · 6 min read

How Many Calories Are in a Protein Smoothie? — illustration of a fresh fruit smoothie with berries and a straw

Smoothie King Nutrition Calculator: The Short Answer

The Gladiator Strawberry (20 oz) at Smoothie King has 220 calories, with 45g of protein, 2g of fat and 340mg of sodium — the standard build, exactly as the Smoothie King Nutrition Calculator lists it. The Smoothie King menu tracked here does not list "Protein Smoothie" by that name, so the closest match on the menu — the Gladiator Strawberry (20 oz) — is the item answered below.

For context, the Smoothie King Nutrition Calculator tracks 15 items, and the average one runs about 403 calories. 7 of them come in under 300 calories and 10 under 500, while the heaviest — the The Hulk Strawberry (20 oz) — reaches 820. Where a single item sits inside that spread matters more than the item's reputation: menus, not names, decide what a meal costs.

The Full Breakdown: What Is in the Gladiator Strawberry?

The full profile of the Gladiator Strawberry (20 oz) at Smoothie King: 220 calories, 45g of protein, 3g of carbohydrates, 2g of fat, 1g of fibre, 1g of sugar and 340mg of sodium. Against a 2,000-calorie reference day, that is 11% of the day's calories, 15% of the sodium guideline and 2% of the 50g sugar daily value — which is why the same item can be a light choice in one day and the whole budget in another.

Where those calories sit matters as much as the total. Protein contributes 180 of them, carbohydrate 12 and fat 18 — so the Gladiator Strawberry is a fat-led item, which is why smaller portions of it still satisfy. That split, not the headline number alone, is what decides how long the meal keeps you full.

How Many Calories Are in a Protein Smoothie? — illustration of a bowl of fresh fruit (in-article illustration)

How Does It Compare With the Rest of the Smoothie King Menu?

One number means little without the menu around it. The table below lines the Gladiator Strawberry up against the lightest item at Smoothie King, the highest-protein item, the best protein-per-calorie pick and the heaviest item on the menu.

For context, the Smoothie King Nutrition Calculator tracks 15 items, and the average one runs about 403 calories. 7 of them come in under 300 calories and 10 under 500, while the heaviest — the The Hulk Strawberry (20 oz) — reaches 820. Where a single item sits inside that spread matters more than the item's reputation: menus, not names, decide what a meal costs.

ItemCaloriesProteinCarbsFatSodium
Gladiator Strawberry (20 oz)22045g3g2g340mg
Kids Berry Berry Good (12 oz)1702g40g1g40mg
The Hulk Strawberry (20 oz)82023g134g21g360mg

What Pushes the Number Up (and How to Pull It Down)?

At Smoothie King, the headline item is rarely the whole story: size upgrades, sauces, cheese and the side you add by habit regularly contribute as much as the main itself. The menu's own extremes prove the point — the same kitchen produces the Kids Berry Berry Good (12 oz) at 170 calories and the The Hulk Strawberry (20 oz) at 820. The gap between a light visit and a heavy one is almost never the restaurant; it is two or three quiet additions.

The reliable defence is to decide the extras on purpose. Keep one rich addition — a sauce, a cheese, a dessert — rather than stacking them, and let high-volume, low-calorie items do the filling: the Daily Warrior (20 oz) leads this menu for fibre at 15g, and fibre is what makes a lighter order still feel like a meal three hours later.

  • Lightest item on the menu: Kids Berry Berry Good (12 oz) — 170 calories
  • Heaviest item on the menu: The Hulk Strawberry (20 oz) — 820 calories
  • Best protein per calorie: Gladiator Strawberry (20 oz) — 20.5g per 100 calories
  • Items under 300 calories here: 7 of 15

What About the Sodium and Sugar?

Calories get the attention, but at Smoothie King the quieter numbers deserve a look. The saltiest item on the menu, the Peanut Power Plus (20 oz), carries 420mg of sodium — 18% of the full day's 2,300mg guideline in a single item — while the least salty, the Caribbean Way (20 oz), carries just 10mg. Salt rarely tracks calories: plenty of light-looking orders are sodium-heavy, and plenty of hearty ones are moderate.

Sugar is more concentrated. The The Hulk Strawberry (20 oz) holds 120g — more than the American Heart Association's full-day suggested limit for women (25g) and men (36g) — while most savoury items sit in single digits. The practical rule: check the drink and dessert line first, because that is where the sugar in a Smoothie King order almost always lives.

How Does This Fit the Rest of Your Day?

No Smoothie King order happens in isolation, so place this one against a reference day of about 2,000 calories, 2,300mg of sodium and a 50g sugar daily value. The average item in the Smoothie King Nutrition Calculator runs about 403 calories, which means a typical one-item-plus-side order lands near a third of the day's energy before a drink is counted. That is not a problem to solve — it is a budget to be aware of, and the awareness is most of the value: the rest of the day can run lighter precisely because lunch was counted.

The pattern that works for most people is asymmetry. On a day when Smoothie King is the main event, let the other meals be simple and protein-led, drink water by default, and treat the The Hulk Strawberry (20 oz) (120g of sugar) as the dessert decision made in advance rather than at the till. On a day when the other meals are the occasion, Smoothie King can be the light one instead — the Kids Berry Berry Good (12 oz) at 170 calories proves the menu supports it. Either way, the plan is made once, calmly, instead of being renegotiated at every meal.

  • Menu average: ~403 calories per item across 15 tracked items
  • Lightest anchor: Kids Berry Berry Good (12 oz) — 170 calories
  • Best protein per calorie: Gladiator Strawberry (20 oz) — 20.5g per 100 cal
  • Fibre leader: Daily Warrior (20 oz) — 15g, against a 28g daily target
  • Salt ceiling to watch: Peanut Power Plus (20 oz) — 420mg in one item

The Bottom Line

The Gladiator Strawberry (20 oz) at Smoothie King has 220 calories, with 45g of protein, 2g of fat and 340mg of sodium. If your build differs from the standard one — an extra sauce, a different size, a swapped side — run it through the Smoothie King Nutrition Calculator before you order: thirty seconds there replaces every guess in this article with your exact total.

How Many Calories Are in a Protein Smoothie? — illustration of a fresh fruit smoothie with berries and a straw (another serving view)

People Also Ask

How Many Calories Are in an Angel Food Smoothie?

The Angel Food Slim (20 oz) at Smoothie King has 220 calories, with 5g of protein, 2g of fat and 180mg of sodium — the standard build, exactly as the Smoothie King Nutrition Calculator lists it.

What Is the Healthiest Protein Smoothie?

The healthiest order at Smoothie King is the Gladiator Strawberry (20 oz): 220 calories with 45g of protein, 1g of fibre, 1g of sugar and 340mg of sodium. It wins because it pairs real protein with fibre while keeping sodium and sugar near the bottom of the menu — the combination the rest of this ranking is scored on.

How Much Protein Is in One Chicken Breast?

One typical chicken breast fillet (about 150g cooked) contains roughly 46–47g of protein and about 250 calories. Size is the whole variable: a small 120g breast gives about 37g, a large 200g breast about 62g — all at the same 31g of protein per 100g for cooked, skinless breast. That single portion covers most of a smaller adult's daily protein target (about 0.

How Much Protein Is in Chicken Thigh vs. Chicken Breast?

Per 100g cooked, skinless: chicken breast has about 31g of protein at 165 calories; chicken thigh has about 26g of protein at roughly 180–210 calories. The breast wins on protein per calorie by a wide margin; the thigh wins on flavour, moisture and iron and zinc content. With skin on, the thigh's calorie gap widens further while its protein stays the same.

Build This Meal in the Smoothie King Nutrition Calculator

Every number in this guide comes from the same data as our free Smoothie King Nutrition Calculator — open it, build your exact order, and check your totals live.

Open the Smoothie King Nutrition Calculator →

Frequently Asked Questions

The Gladiator Strawberry (20 oz) at Smoothie King has 220 calories, with 45g of protein, 2g of fat and 340mg of sodium — the standard build, exactly as the Smoothie King Nutrition Calculator lists it. The Smoothie King menu tracked here does not list "Protein Smoothie" by that name, so the closest match on the menu — the Gladiator Strawberry (20 oz) — is the item answered below.

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