Does mustard oil weigh the same as other cooking oils per cup?

Very close. Mustard oil (0.921 g/ml) is within 1% of sunflower oil (0.918), canola oil (0.916), and light olive oil (0.911–0.919). The mass difference per tablespoon is less than 0.1 g—negligible for any cooking recipe. Use the gram values from this page for precision, but substituting another oil by volume will not meaningfully change the result.

Is mustard oil the same as prepared mustard condiment?

No. Mustard oil is pure oil pressed from mustard seeds—it is a fat. Prepared mustard (yellow, Dijon, whole-grain) is a condiment made from ground seeds, water, vinegar, and spices; it is mostly water and is far denser (~1.0–1.1 g/ml). This page covers pure mustard oil only.

Why is mustard oil labeled 'for external use only' in some countries?

In the United States and Canada, mustard oil sold for food use must carry this label because of its erucic acid content, which exceeded limits set in those jurisdictions. However, it is approved and widely used as a cooking oil in India, Bangladesh, Nepal, and parts of Eastern Europe, where it is a traditional culinary staple. The density and conversion values on this page are accurate regardless of regulatory jurisdiction.

Oil, Mustard

By Fidamen-Chefsolver Team | Reviewed by Chefsolver Staff

Mustard oil is a pungent, golden-yellow cooking oil cold-pressed from mustard seeds. With a density of 0.921 g/ml, it sits in the typical range for vegetable cooking oils—lighter than water and close to sunflower (0.918), canola (0.916), and olive oil (0.911–0.919). A cup of mustard oil weighs approximately 218 g; a tablespoon weighs about 13 g. Mustard oil is widely used in South Asian and Eastern European cuisines for tempering spices, pickling, and high-heat frying; it has a smoke point around 250 °C. In some markets (including the US), bottles carry an "external use only" label due to its erucic acid content, though it is a staple cooking oil in many South Asian households. For conversion purposes, it behaves identically to other cooking oils.

Quick convert

Ingredient

→

US cup = 236.588 mL
1 tbsp = 14.787 mL
1 tsp = 4.929 mL

Reference table

Oil, Mustard — milliliters to grams
mL	g
10	9
25	23
50	46
75	69
100	92

Use for tempering whole spices at the start of a curry, in pickles and chutneys, or for high-heat frying. In Eastern European cooking, it appears in salad dressings and preserved vegetables.

How this conversion works

Milliliters measure volume while grams measure weight. Because Oil, Mustard has a density of 0.921 g/mL, 10 mL weighs 9 g — not 10 g as it would for water. This converter uses the real density of Oil, Mustard so every measurement is accurate.

Measurement notes

Values are rounded to the nearest whole gram. Actual weight can vary slightly with compaction, temperature, and brand. For precision baking, a kitchen scale is always more reliable than volume measurements.

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FAQ

Does mustard oil weigh the same as other cooking oils per cup?: Very close. Mustard oil (0.921 g/ml) is within 1% of sunflower oil (0.918), canola oil (0.916), and light olive oil (0.911–0.919). The mass difference per tablespoon is less than 0.1 g—negligible for any cooking recipe. Use the gram values from this page for precision, but substituting another oil by volume will not meaningfully change the result.
Is mustard oil the same as prepared mustard condiment?: No. Mustard oil is pure oil pressed from mustard seeds—it is a fat. Prepared mustard (yellow, Dijon, whole-grain) is a condiment made from ground seeds, water, vinegar, and spices; it is mostly water and is far denser (~1.0–1.1 g/ml). This page covers pure mustard oil only.
Why is mustard oil labeled 'for external use only' in some countries?: In the United States and Canada, mustard oil sold for food use must carry this label because of its erucic acid content, which exceeded limits set in those jurisdictions. However, it is approved and widely used as a cooking oil in India, Bangladesh, Nepal, and parts of Eastern Europe, where it is a traditional culinary staple. The density and conversion values on this page are accurate regardless of regulatory jurisdiction.