“3/8 inch”, e.g., is an adjective, describing “thin plates”. “Griddle plates are available in different thicknesses ranging from thin plates (3/8 inch to 3/4 inch) to thick plates (1 inch to 1 1/2 inch).” I would hyphenate “3/8 inch”, “3/4 inch”, etc. To be fully grammatically correct, we recommend “Griddle plates are available in different thicknesses ranging from thin plates (three-eighths of an inch to three-fourths of an inch) to thick plates (one inch to one and one-half inches).” Also acceptable would be “Griddle plates are available in different thicknesses ranging from thin plates (3/8 inch to 3/4 inch) to thick plates (1 inch to 1 1/2 inch).” thicknesses ranging from thin plates (three-eighths-inch thick plates to three-quarters-inch thick plates).” thicknesses ranging from thin plates (three-eighths of an inch thick to three-fourths of an inch thick)” rather than in compound adjective form “. Our guess is that you have simple measurements within your parentheses which, if written out, are really saying “. Whether a hyphen is placed before the word “inch” or not depends upon whether these are compound adjectives or simple measurements. Let’s bring in Rule 2, which cautions us to “Be consistent within a category.” Therefore, we should either write them all out in words or express them all in figures. Rule 4 says “A mixed fraction can be expressed in figures unless it is the first word of a sentence,” which would allow us to write 1 1/2 inches in figures rather than write it out. Rule 3 of Writing Numbers says “Always spell out simple fractions and use hyphens with them.” This would lead us to write three-eighths inch and three-fourths inch. The first complexity is that your example contains both simple fractions and a mixed fraction. Rachel, while you may have thought you were asking a relatively simple question, this is really a complex lesson in writing numbers. The water level rose 10 inches in just three hours. Can you lend me your five-foot tape measure? (Correct)ĥ. Stella had her hair cut six inches last week.ģ.
The water level rose 10-inches in just three hours.ġ. Can you lend me your five-foot tape measure?ĥ. Stella had her hair cut six-inches last week.ģ. (But remember, all two-word numbers from twenty-one to ninety-nine must be hyphenated in all cases.)ġ. When numbers are not used as compound adjectives preceding nouns, don’t use a hyphen. In the above sentences, the measurements are compound adjectives describing nouns. Should you write 13-feet or 13 feet? Here is the rule: when you’re combining two or more words to form a compound adjective in front of a noun, put hyphens between these words.Īn eighteen-inch monitor is too big for my desk.Įmergency room nurses work 12-hour shifts.
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