Type a cabin number to see where it is on Costa Diadema, what's above and below it, and how quiet it's likely to be — or browse the quietest cabins in each category.
The deck plan shows decks 0–15. Cabins are on decks 1–2, 6–12; the other decks have public areas, crew or service spaces.
The quietest cabins of each type, by our quiet score. Prices and availability vary by sailing.
479 cabins of this type. 6157 (Deck 6, midship, quiet score 100) · 6176 (Deck 6, midship, quiet score 100) · 8138 (Deck 8, midship, quiet score 100) · 8141 (Deck 8, midship, quiet score 100) · 7136 (Deck 7, midship, quiet score 100)
183 cabins of this type. 7135 (Deck 7, midship, quiet score 100) · 1324 (Deck 1, midship, quiet score 97) · 1327 (Deck 1, midship, quiet score 97) · 1320 (Deck 1, midship, quiet score 97) · 1323 (Deck 1, midship, quiet score 97)
192 cabins of this type. 1326 (Deck 1, midship, quiet score 97) · 1329 (Deck 1, midship, quiet score 97) · 1322 (Deck 1, midship, quiet score 97) · 1325 (Deck 1, midship, quiet score 97) · 1318 (Deck 1, midship, quiet score 97)
48 cabins of this type. 1222 (Deck 1, forward, quiet score 92) · 1223 (Deck 1, forward, quiet score 92) · 1221 (Deck 1, forward, quiet score 92) · 1220 (Deck 1, forward, quiet score 92) · 10007 (Deck 10, forward, quiet score 90)
641 cabins of this type. 7139 (Deck 7, midship, quiet score 100) · 8140 (Deck 8, midship, quiet score 100) · 8143 (Deck 8, midship, quiet score 100) · 6159 (Deck 6, midship, quiet score 100) · 6178 (Deck 6, midship, quiet score 100)
110 cabins of this type. 2128 (Deck 2, midship, quiet score 93) · 2161 (Deck 2, midship, quiet score 93) · 2124 (Deck 2, midship, quiet score 93) · 2157 (Deck 2, midship, quiet score 93) · 2120 (Deck 2, midship, quiet score 93)
37 cabins of this type. 7134 (Deck 7, midship, quiet score 100) · 7130 (Deck 7, midship, quiet score 100) · 7131 (Deck 7, midship, quiet score 100) · 7148 (Deck 7, midship, quiet score 100) · 7153 (Deck 7, midship, quiet score 100)
10 cabins of this type. 7119 (Deck 7, midship, quiet score 100) · 7115 (Deck 7, midship, quiet score 100) · 7107 (Deck 7, midship, quiet score 100) · 7104 (Deck 7, midship, quiet score 100) · 7098 (Deck 7, midship, quiet score 100)
We place every cabin on its deck from the official deck plan, then look at what's directly above and below it and what's next to it. Cabins sandwiched between other cabins, away from venues, stairs and the very ends of the ship, score highest.
Costa's deck plan doesn't label connecting, accessible or obstructed-view cabins, so we don't flag them here. Check with the cruise line before you book.
The quiet score doesn't include size. In our deck plan data, cabins of the same type are about the same size wherever they are on the ship — forward, midship or aft. Bigger rooms are sold as their own categories (for example Extended Balcony or Aft-View Extended Balcony), so compare categories, and check each one's size on the cruise line's site before you book.
Built from the cruise line's published deck plan, which can change after refits. Venue positions are approximate. Always confirm with the cruise line before you book.
Sources: Costa Cruises — Costa Diadema deck plans, Wikipedia — Costa Diadema. Deck plan data checked 2026-11-01