Convert Earth's Velocity (v⊕) to Knot (UK) (kt (UK)) instantly.
About these units
Earth's Velocity (v⊕)
Earth's orbital velocity around the Sun averages about 29.78 km/s, or roughly 107,000 km/h. This enormous speed is imperceptible to us because everything on Earth—including its atmosphere—moves with the planet. Earth's velocity varies slightly over the year due to its elliptical orbit, being fastest at perihelion (closest to the Sun) and slowest at aphelion (farthest distance). This velocity influences astronomical observations, Doppler shifts in starlight, and the calibration of spacecraft navigation. Earth's motion through the Solar System is a reminder that even when we feel stationary, we are traveling at extraordinary speeds through space.
Knot (UK) (kt (UK))
The UK knot historically varied slightly from the international knot because the UK used different values for the nautical mile depending on era and maritime authority. Though the differences were minor, they mattered in navigation, where precision affects charting, dead reckoning, and ocean voyaging. Modern UK practice fully aligns with the international knot (1 nautical mile per hour), but historical documents and charts may reference older UK knot values. The knot's rich maritime heritage—used by sailors measuring speed with knotted ropes dragged along the water—makes it one of the oldest continuously used speed units.