How roomy is an assembled sofa bed on average?

An assembled sofa bed, such as those from Koala, IKEA, or West Elm, typically offers a sleeping area around 72 to 81 inches long and 52 to 70 inches wide, providing room comparable to a full or queen-size mattress.

Sofa beds generally convert into sleeping areas that range from full to queen-size, depending on the model.

For instance, modern furniture brands like Koala, IKEA, and West Elm offer sofa beds with sleeping surfaces typically around 72 inches long and between 52 and 70 inches wide, providing enough space for one or two adults to sleep comfortably, balancing space-saving design with practical functionality for most living rooms or guest spaces.