The Earth orbits around the Sun at an average speed of about 29.78 kilometers per second (18.5 miles per second). This speed is equivalent to approximately 107,200 kilometers per hour (66,600 miles per hour) or 30 kilometers per second (18.64 miles per second).
It's important to note that this speed is an average value because the Earth's orbit is not a perfect circle but rather an ellipse. As a result, the Earth's speed varies slightly throughout the year. When the Earth is closer to the Sun (at perihelion), it moves slightly faster, and when it is farther away (at aphelion), it moves slightly slower. Nonetheless, the average speed mentioned earlier provides a good approximation of Earth's orbital velocity around the Sun.