The number of calories in a glazed donut depends on the brand of donut. The Original Glazed® Doughnut from Krispy Kreme has 190 calories. A glazed donut from Dunkin' Donuts has 260 calories.
Krispy Kreme offers 12 additional standard-sized glazed donut flavors, while Dunkin' Donuts offers 13. The glazed donuts vary in calorie count depending on the glaze flavor and type of filling, if any.
For the calorie-conscious, Krispy Kreme also offers mini glazed donuts, though the calorie count is only slightly less than the regular-sized donuts. The Krispy Kreme Mini Original Glazed® Doughnut has 179 calories, while the Mini Chocolate Ice Glazed Doughnut has 229.
The dictionary-approved spelling is "doughnut," though the shortened version, "donut," also is an acceptable spelling. The term "donut" has been in use since the 1800s and was popularized by Dunkin' Donuts in the late 20th century.