Mayonnaise is one of the most calorie-dense condiments in the kitchen, and small scoops can add up faster than you expect. This mayonnaise calories per ounce calculator converts your serving size into an exact calorie count using the nutrition profile of the mayo type you choose — regular, light, olive oil, vegan, Kewpie, or homemade.
Just enter your portion in ounces or grams, select your mayo, and the tool returns total calories, fat, carbs, protein, and a clear calculation breakdown. It is useful for meal prep, restaurant portion estimates, low-carb or keto tracking, and anyone who wants a realistic view of how much mayo actually contributes to their daily intake.
Because different brands vary slightly, the underlying values are based on standard USDA-style reference data and rounded for everyday use.
🥄 Mayonnaise Calorie Calculator
Find out how many calories are in your serving of mayo — in ounces or grams.
Quick Start
Pick the mayo style that matches what is in your fridge. If your brand isn't listed, choose the closest match — regular, light, olive oil, vegan, Kewpie, and homemade cover the most common supermarket categories. Next, enter your serving size in ounces or grams. One tablespoon of regular mayo weighs about 14 grams, which is roughly 0.5 oz; one teaspoon weighs about 4.7 g; one quarter cup weighs about 2 oz. You can also tap one of the quick-fill buttons to preload a common portion.
Press Calculate, and the tool shows total calories, fat, carbohydrates, protein, and the conversion steps. If you want to start over, Reset clears the numbers and restores the default regular mayo, 1 oz portion.
Reference Table: Calories and Macros by Mayo Type
| Mayo type | Calories per oz | Fat per 100 g | Carbs per 100 g | Protein per 100 g |
|---|---|---|---|---|
| Regular | 193 | 75 g | 1 g | 1 g |
| Light / reduced-fat | 96 | 34 g | 7 g | 1 g |
| Olive oil | 193 | 76 g | 1 g | 0.5 g |
| Vegan | 190 | 74 g | 2 g | 0.8 g |
| Kewpie | 199 | 77 g | 2 g | 1 g |
| Homemade | 184 | 72 g | 1 g | 1 g |
Values are rounded from typical commercial nutrition labels. The exact numbers depend on the oil blend, egg yolk content, added sugar, vinegar, and how much water the brand uses.
How the Calorie Math Works
Mayonnaise owes almost all its calories to fat. Fat supplies about 9 kcal per gram, while carbohydrates and protein supply about 4 kcal per gram. The calculator converts your portion to grams, then applies the selected mayo's calorie density:
Grams = ounces × 28.3495
Total kcal = (calories per 100 g × grams) ÷ 100
For regular mayo at 680 kcal per 100 g, a 1 oz scoop weighs 28.35 g, so total = 680 × 28.35 ÷ 100 = 192.8 kcal. It also gives a per-ounce reference of 192.8 kcal. For light mayo at 340 kcal per 100 g, the same ounce contains 96.4 kcal. That is why choosing light mayo can save nearly 100 kcal per ounce — but check the carb line, because some light versions add sugar or starch.
Worked Example: Sandwich, Salad, and Dip
Try these real portions to see how quickly mayo calories add up:
- Two tablespoons of regular mayo on a sandwich: about 28 g = 1 oz → 193 kcal.
- One half cup of regular mayo in pasta salad: 4 oz → 772 kcal before any other ingredients.
- Two ounces of light mayo in a dip: about 192 kcal instead of 386 kcal for regular.
- One teaspoon of Kewpie mayo on rice or sushi: about 4.7 g → 33 kcal.
For counting purposes, mayonnaise is one of the few condiments where a small visual difference changes the calorie total by 20–30 kcal, so it helps to weigh or measure it instead of eyeballing.
Factors Affecting Accuracy
Brand-specific labels can vary from the reference values by 10–20 percent. Oil-first mayo is always near 700–720 kcal per 100 g; 'olive oil' mayo may still contain soybean or canola oil, and some 'light' products contain 300–400 kcal per 100 g.
Signs to look for on the label: calories per 100 g, calories per tablespoon, and the serving weight in grams. If the label says 90 kcal per 13 g tablespoon, that is about 198 kcal per oz. If it says 35 kcal per 15 g tablespoon, that is about 66 kcal per oz and likely a whipped or very low-fat product not covered well by the categories here.
For the most accurate result, use a food scale and log the exact grams. One tablespoon of mayo can be 13–16 g depending on temperature, brand, and how full the spoon is.
Frequently Asked Questions
Is mayonnaise high in calories?
Yes, regular mayonnaise is one of the most calorie-dense condiments at roughly 193 kcal per ounce. One cup is about 1,540 kcal, which is close to many people’s entire daily fat target.
How many calories are in a tablespoon of regular mayo?
If a tablespoon is 14 g, regular mayo gives about 95 kcal. Many labels round to 90–110 kcal. The calculator’s 1 tbsp preset uses 0.5 oz (14.2 g), which comes to roughly 97 kcal.
Why do the numbers differ from my jar’s label?
Recipes vary between manufacturers. Some jars list a 13 g serving, others 15 g. Also, 'original' mayo from brands like Hellmann’s, Best Foods, Duke’s, and Kraft are all close to 190–200 kcal per oz, but specialty and homemade versions can differ.
Is light mayo better for low-carb diets?
Not necessarily. Light mayo usually has about half the calories, but it often contains added sugar or modified starch, so its carb count can be higher than regular. Always check the label.
For authoritative values, browse the USDA FoodData Central database or the FDA’s Nutrition Facts label guide. If you are tracking other condiments, the ketchup calorie calculator can help you compare a much lower-calorie option.