780 centimeters is equal to 307.086 inches.
This is about the same length as a standard doorway, which is usually around 80 inches tall. It is also slightly longer than the average height of a person, which is around 5 feet 9 inches or 69 inches.
Another comparison is that 780 centimeters is slightly longer than a king-size bed, which is typically 80 inches long. It is also almost double the length of a regular sheet of paper, which is 11 inches.
Additionally, 780 centimeters is about 2.6 times the length of a standard school ruler, which is 12 inches. It is also about 2.2 times the length of a standard dollar bill, which is 6.14 inches.
Overall, 780 centimeters is a relatively long length and is comparable to the length of everyday objects such as furniture, doors, and people.