The Earth takes approximately 365.25 days to complete one full revolution around the Sun. This period is known as a sidereal year and is about 365.256 days long

. More precisely, the tropical year, which is the time it takes for the seasons to repeat (and the basis for our calendar year), is about 365.24219 days, or 365 days, 5 hours, 48 minutes, and 45 seconds

. During this time, Earth travels about 940 million kilometers (584 million miles) in its orbit, which is an elliptical path with the Sun near one focus

. The average distance from the Earth to the Sun is roughly 150 million kilometers (93 million miles)

. In summary:

• Earth's orbital period (sidereal year): ~365.256 days
• Tropical year (seasonal cycle): ~365.24219 days
• Distance traveled in orbit: ~940 million km (584 million miles)
• Average Earth-Sun distance: ~150 million km (93 million miles)

This orbital period defines the length of one Earth year. The slight difference from exactly 365 days is why we have leap years to keep our calendar aligned with Earth's orbit