column inch

A column inch is a single vertical inch of a newspaper or magazine column, measured from the top to the bottom of the printed area. It is the fundamental unit by which print media sells advertising space and charges for placement. A standard newspaper column is typically 2 to 2.5 inches wide, so a column inch represents the area occupied by one inch of height across that full width. This measurement has remained consistent across the print industry for over a century.

The term originated because newspaper pages were divided into vertical columns of text, and space was naturally measured as depth within those columns. A full-page advertisement might be described as occupying 50 column inches; a small classified ad, perhaps 2 or 3. Publishers set rates per column inch, so a 10-inch ad in a 6-column page costs substantially more than the same 10 inches in a narrower column format. The actual print size varies because column width varies, making the column inch a relative measure tied to the publication's own page layout.

Calculating space and cost

To determine the cost of an advertisement, multiply the number of columns the ad spans by its depth in inches, then multiply by the per-column-inch rate. An ad running 3 columns wide by 4 inches deep occupies 12 column inches. If the rate is $50 per column inch, the cost is $600. Rates vary significantly by publication, position (front page versus back), and circulation. Some publications offer discounts for bulk purchases or long-term contracts.

Though digital advertising has displaced much print volume, column inches remain the standard measurement for newspaper and magazine ads. Trade publications, local papers, and specialized journals still price space this way. The metric works because it combines two physical dimensions into a single, easily scalable number that accounts for both width and depth of the ad placement.