Coffee Maker "Cup" Size Comparator
Coffee makers are sold and labeled by "cups" — a 12-cup pot, a 5-cup pot — but that "cup" is not the 8 fl oz US measuring cup used on nutrition labels or in most recipes. Each brand defines its own, smaller "cup" for the count printed on the box. We fetched four brands' own current pages directly and worked out what each one's "cup" is actually worth.
Three brands agree closely; one doesn't
Bunn's own page, Ninja's own page and Black+Decker's own page each work out to 5.00 oz per labeled
"cup." KitchenAid's own page states a smaller
figure directly: "a cup marking on our carafes is approximately 4.75 oz." A 12-cup pot is 3 oz
smaller under KitchenAid's own number than under the other three brands' own numbers — enter your
machine's labeled cup count below to see the gap at your own size.
None of the four reach a real 8-oz cup, even on their own numbers
Even Bunn's, Ninja's and Black+Decker's own 5.00 oz figure — the largest of the four — is 37.5% smaller than a true 8 fl oz measuring cup. A pot labeled "12-cup" under any of these four brands' own numbers brews somewhere between 7.13 and 7.50 real 8-oz cups, never 12.
The four brands' own "cup," side by side
| Brand | Their own "cup" | Their own page states |
|---|---|---|
| KitchenAid | 4.75 oz | "A cup marking on our carafes is approximately 4.75 oz." |
| Bunn | 5.00 oz | "10-Cup" product name; "a full 50oz carafe" on the same page (50 ÷ 10 = 5.00 oz) |
| Ninja | 5.00 oz | "The 70 oz. (14-cup) Ninja glass carafe..." |
| Black+Decker | 5.00 oz | "One serving equals approximately 5 ounces" |
What this does not do
- It only covers four brands, the ones whose own current page this session could fetch and confirm directly. Mr. Coffee's and Cuisinart's own domains blocked every specific product URL tried — they are left out rather than filled in from a search-result snippet.
- It compares each brand's general drip-carafe "cup" figure, not every individual model. A single-serve or specialty setting on the same brand's own machine can use a different size (KitchenAid's own single-serve and cold-brew products, for example, are not covered here).
- It does not account for grounds absorption. KitchenAid's own page notes brewing one of its 4.75 oz cups takes "approximately 5.25 ounces of fresh water" — about 0.5 oz is lost to the grounds on the way in. This tool works from finished, brewed ounces, the number that ends up in your carafe, not the water you pour in.
- It treats the 8 fl oz measuring cup as the fixed comparison point because it's the unit nutrition labels and most recipes use — not because any of the four brands claims to match it.