How many people can fit around the circumference of the earth?

To estimate how many people can fit around the Earth's circumference, we can use the Earth's circumference of about 40,075 kilometers (24,901 miles). If we assume an average shoulder width of about 0.5 meters (1.6 feet) per person, approximately 80 million people could stand shoulder to shoulder around the globe. This is a rough estimate and actual numbers could vary based on spacing and individual sizes.