Spices, onion powder
FDC 171327tsp (2 g)
Source: USDA FoodData Central · Public domain
Original analysis by NutriVerdict
Density 76 · -17 vs Spices & herbs medianOnion powder concentrates a lot of nutrition into a small amount of dried spice: at 341 calories per 100 grams it scores 76 of 100, a Strong result ranking 46 of 60 in Spices & herbs, below the category median of 93. Fiber leads at 54% of the Daily Value, with calcium at 30%, magnesium at 27%, and vitamin C at 26%, all in the excellent tier.
It is used a pinch or teaspoon at a time to season soups, rubs, and sauces rather than eaten in any real quantity, with a typical serving of just 2 grams. The honest caveat is that those Daily Value percentages are calculated per 100 grams, a portion no one actually uses at once, so a teaspoon's real contribution is far smaller. Ground mustard seed scores higher within Spices & herbs for anyone comparing options.
See how this score is calculated, build a plate around spices, onion powder, or compare it with another food.
Source: USDA FoodData Central · Public domain
Percent of calories derived by NutriVerdict from USDA grams
Nutrition facts
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 341 kcal | 17% |
| Total fat | 1 g | 1% |
| Saturated fat | 0.22 g | 1% |
| Cholesterol | 0 mg | 0% |
| Sodium | 73 mg | 3% |
| Carbohydrate | 79 g | 29% |
| Dietary fiber | 15 g | 54% |
| Sugars | 6.6 g | |
| Protein | 10 g | 21% |
| Potassium | 985 mg | 21% |
| Calcium | 384 mg | 30% |
| Iron | 3.9 mg | 22% |
| Magnesium | 113 mg | 27% |
| Vitamin C | 23 mg | 26% |
| Vitamin A | 0 µg | 0% |
| Vitamin E | 0.27 mg | 2% |
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 7 kcal | 0% |
| Total fat | 0.02 g | 0% |
| Saturated fat | 0 g | 0% |
| Cholesterol | 0 mg | 0% |
| Sodium | 1.5 mg | 0% |
| Carbohydrate | 1.6 g | 1% |
| Dietary fiber | 0.3 g | 1% |
| Sugars | 0.13 g | |
| Protein | 0.21 g | 0% |
| Potassium | 20 mg | 0% |
| Calcium | 7.7 mg | 1% |
| Iron | 0.08 mg | 0% |
| Magnesium | 2.3 mg | 1% |
| Vitamin C | 0.47 mg | 1% |
| Vitamin A | 0 µg | 0% |
| Vitamin E | 0.01 mg | 0% |
Source: USDA FoodData Central · Public domain
FDC 171327Original analysis by NutriVerdict
What it is rich in
Nutrients supplying at least 10% of the Daily Value per 100 grams. 20% or more is an excellent source.
Original analysis by NutriVerdict
Versus the spices & herbs median
Original analysis by NutriVerdict
More nutrient-dense swaps
Foods in the same category that score higher on nutrient density.
Spices, mustard seed, groundDensity 78 vs 76Spices, poppy seedDensity 83 vs 76Spices, ginger, groundDensity 85 vs 76Original analysis by NutriVerdict
In the kitchen and how to use it
Onion powder is made by dehydrating onions and grinding them into a fine powder, giving concentrated onion flavor without the moisture, texture, or prep work of fresh onion. It's a pantry staple for dry rubs on meat, seasoning blends for popcorn or fries, and recipes like dips, marinades, and soups where fresh onion would add unwanted liquid or texture. Because it's so concentrated, a teaspoon goes a long way, and it's often combined with garlic powder, paprika, and salt in homemade spice blends.
Keep onion powder in a sealed container away from light and moisture, where it stays potent for a year or more before its flavor starts to fade. Since it's used in small pinches, typically a teaspoon (2g) at a time, its per-100g nutrient figures are more a reflection of concentration than what a single use contributes; a 100g amount would carry 15.2g of fiber and 341 calories, and notably 54% of the Daily Value for fiber along with 30% for calcium, 27% for magnesium, and 26% for vitamin C. In the tiny quantities actually used per dish, it functions purely as a flavor booster rather than a meaningful source of these nutrients.
Frequently asked questions about spices, onion powder
How is onion powder different from fresh onion?
Onion powder is dehydrated, ground onion, so it delivers concentrated onion flavor without the moisture or texture of fresh onion, making it useful in dry rubs and marinades.
How many calories are in onion powder?
Onion powder has 341 calories per 100g, but since it's used a teaspoon (2g) at a time, an actual serving contributes very few calories.
How should onion powder be stored?
It should be kept in a sealed container away from light and moisture, which keeps its flavor potent for a year or more.