A standard door is typically 80 inches tall, which is 6 feet 8 inches or about 203 centimeters. This height is common for both interior and exterior doors in most homes, especially in the U.S., Canada, and parts of Europe. Some exterior doors and custom doors may be taller, ranging up to 96 inches or more, depending on architectural style and specific needs.
In the UK, the standard door height is slightly shorter, usually around 78 inches (1981 mm) for most internal doors.
So, the general answer is that the standard door height is about 80 inches (6 feet 8 inches) with some regional and custom variations.
