FIRGELLI Science Lab · Earth in motion
How Fast Does the Earth Spin? Speed at Your Latitude
At the equator, Earth's spin carries you eastward at about 1,674 km/h (1,040 mph). Closer to either pole, your circle around the axis gets smaller, so your speed gets lower. Everyone still turns with the same planet.
Choose two places below. Watch their different-sized paths and discover how fast you are moving—even while sitting still.
North is positive (+); south is negative (−). City latitudes are rounded. Your weight does not change this speed.
Solid paths are on the near side. Dashed paths and faint markers show the far side. People are enlarged and aligned for comparison, not placed at each city's actual longitude. Short lines point to crowded positions.
One animated turn takes 24 seconds. A real turn relative to distant stars takes about 23 hours 56 minutes.
Place A · speed around the axis
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Place B · speed around the axis
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Choose two latitudes to compare their speeds.
These are approximate speeds due to Earth's spin, measured around its axis—not speed across the ground or speed around the Sun. The calculation treats Earth as a sea-level sphere.
Why does your location change the answer?
Imagine two children on a playground roundabout. One stands near the middle and the other near the edge. They finish a turn together, but the child near the edge travels farther. Earth works the same way: the equator is the biggest circle, while the paths near the poles are much smaller.
Same turning rate
Earth turns through about 15° each hour. Changing your latitude does not change the time for one turn.
Different travel speed
At the equator you travel around a large circle. At either pole, the circle shrinks to a point: 0 km/h around the axis.
Try this: equator versus 60° north
Press Try example above. At the equator, the path is about 40,075 km long and the speed is about 1,674 km/h (1,040 mph). At 60° north, both the circle and the speed are half as large: about 20,038 km and 837 km/h (520 mph). Both people complete their turn together.
The calculation, in plain English
Speed = distance around your latitude circle ÷ time for one turn. Latitude tells us how far north or south you are. It changes the size of that circle.
Use degrees for latitude. The number 6,378.137 is Earth's equatorial radius in kilometers; 23.9345 is the rotation time in hours. To convert km/h to mph, divide by 1.609344. NASA's Earth Fact Sheet supplies the radius and rotation period.
Real Earth is slightly flattened, and altitude changes your distance from the axis. This rounded, spherical model explains the main effect of latitude; it is not a navigation or surveying calculation. NOAA explains Earth's shape.
Questions about Earth's rotation
How fast does the Earth spin in mph and km/h?
At the equator, approximately 1,040 mph or 1,674 km/h. The speed around the axis becomes smaller as you move toward either pole. Enter a latitude above to get the local estimate.
How fast am I moving at my latitude?
Multiply the equator speed by the cosine of your latitude. At 45° north or south, for example, the speed is about 1,184 km/h (736 mph). The calculator does this for you and shows your circle on the globe.
Why don't we feel the Earth spinning?
You, the ground and the surrounding air share Earth's overall rotation. There is no sudden start or stop to throw you sideways. Rotation does have a small effect on the forces you feel, but gravity is much stronger. Everyday wind is not simply Earth rushing past stationary air. NASA explains rotational speed and its small effect on effective gravity.
Does Earth take 24 hours or 23 hours 56 minutes to spin?
One turn compared with distant stars takes about 23 hours 56 minutes. Meanwhile, Earth moves along its orbit. It must turn a little farther for the Sun to return to the same direction, giving an average solar day of 24 hours. This calculator uses the star-based rotation time. NASA explains the two kinds of day.
Do the North and South Poles move with the spin?
A point exactly on either rotation pole has no circular travel around Earth's axis, so this speed is zero. Earth still turns around that axis. Zero here does not mean zero motion through space: Earth also travels around the Sun.
Does Earth spin faster in the Northern Hemisphere?
No. Places at equal distances north and south of the equator have equal speeds in this model. For example, 30° north and 30° south match. The sign of latitude changes the hemisphere, not the speed.
Is this the same as Earth's speed around the Sun?
No. Spinning means turning around Earth's own axis; orbiting means traveling around the Sun. This calculator shows only spinning speed. Combining different motions requires their directions and a chosen reference frame, not just adding the speed numbers.
Does my weight or the time of day change the answer?
Your weight does not change the speed at which Earth's surface carries you. Time of day and longitude do not change this simple latitude-based result either. The globe's animation is a comparison, not a live clock or weather map.