Walnut Oil - How Many Calories?

Calories in a spoonful of walnut oil

USDA's tablespoon measure is 13.6 g walnut oil, providing about 120 kcal. Its teaspoon is 4.5 g, providing approximately 40 kcal. Household spoons and fill levels vary, so use grams for a precise calculation. Millilitres of oil should not automatically be treated as the same number of grams.

Does the oil contain everything in a walnut?

Walnut oil mainly supplies fat. The reference lists zero protein and fibre; the oil does not replace the fibre and protein in whole kernels. Adding 5 g oil contributes about 44 kcal; 10 g adds 88 kcal. Alpha-linolenic acid (ALA) is reported at 10.4 g per 100 g oil, or 1.04 g in 10 g. ALA differs from the EPA and DHA found in fish.

Using it in food

Measure food-grade walnut oil into a dressing or drizzle it over cooked food. If a salad for two contains 10 g oil in total, each person receives about 44 kcal from the oil alone. Count any walnut kernels in the salad separately. Cold-pressed, refined and roasted walnut oils can have different cooking instructions, so follow the label for high-heat use. Oil intended for wood finishing or cosmetic use is not a substitute for edible oil.

Should opened walnut oil be refrigerated?

Follow your own product's label. La Tourangelle, for example, recommends refrigerating its roasted walnut oil after opening. Keep the lid closed, avoid leaving the bottle beside a hot cooker and note when it was opened. For a walnut allergy, the word oil alone does not establish safety; the processing method and allergen label also matter.

Source note: Nutrient values come from USDA SR 28, 04528. The storage example comes from La Tourangelle's manufacturer guidance; its product label was not mixed with the USDA panel. Reported zeros were retained without turning missing data into zero.