A 3 quart casserole dish is usually about the size of a standard 9 x 13 inch baking dish and holds roughly 12 cups of food.

Typical dimensions

  • For a rectangular 3 quart casserole, common interior dimensions are about 13″ long x 9″ wide x 2″ deep.
  • Many recipes that call for a 3 quart casserole can be baked in any 9″ x 13″ dish with about 2″ sides, since that size falls in the 2–3 quart range.

Shape variations

  • A round 3 quart casserole will usually have a diameter around 8.5–10 inches and a height near 3 inches, but exact measurements vary by brand.
  • An oblong/oval 3 quart dish can be larger in footprint (for example around 16″ x 10.5″ x 3.25″ externally) but still hold the same 3 quart volume; handles and flared rims add to outer size without changing capacity.

How much it serves

  • A 3 quart casserole generally serves about 4–6 people for a main-dish casserole, depending on portion size.
  • For sides like mac and cheese or stuffing, the same 3 quart dish can stretch to more servings since portions are smaller.

Quick way to check your dish

  • If your dish is unmarked, measure the inside length × width × depth in inches and compare to 13″ × 9″ × 2″; if it’s close, it likely holds about 3 quarts.
  • You can also fill the dish with water using a measuring cup; if it holds about 12 cups of water, it is effectively a 3 quart casserole dish.