Cashew kernel grades are written as a letter code followed by a number: the letter describes colour and wholeness, the number describes size as kernels per pound. Understanding them is the difference between ordering what you need and paying for what you don’t.
What the numbers mean
The number is simply how many whole kernels make up one pound (454g). A lower number means a larger kernel, and larger kernels command higher prices.
The white whole grades
W180 is the largest and most expensive white whole grade at roughly 170–180 kernels per pound, which is why the trade calls it the King of Cashews. W240 sits at around 220–240 kernels per pound. W320, at roughly 300–320 kernels per pound, is the most widely traded export grade in the world and the default for most buyers. W450 is the smallest commonly traded white whole grade.
Beyond the white wholes
Below the white grades come the scorched grades, marked SW, which carry the same size counts at a lower price and are perfectly suited to roasting, grinding and confectionery. Below those come butts, splits and pieces — excellent value where appearance does not matter, such as cashew butter or bakery inclusions.
Which standard governs this?
The grading standard used in international trade is maintained by the Association of Food Industries (AFI) in the United States, with BIS and CEPC as further reference standards. A credible supplier will state which standard their contract is written against.
This article is being expanded into our full buyer’s guide to cashew grades.