How much room do you need to turn around?
Getting through the door is half of it. Once you're in, you have to turn. The 60-inch circle, the 30-by-48 clear space, where they matter most, how to check a room with a piece of string, and why it's a drawing decision.
How wide does a doorway need to be for a walker or wheelchair?
Most interior doors are 28 or 30 inches. A wheelchair needs 32 of clear space, and a walker is close behind. Here are the numbers, which doors to widen first, and why this is free on a drawing and a construction job after the wall is built.