Calculate the exact circumference of the earth in km - it's that easy
Calculating the circumference of the earth is one of the most popular computing tasks for children. This practical tip shows you how to calculate the exact scope in km.
Calculate the Earth's circumference: is it that easy?
- The earth is round, but not a perfect sphere. The earth is somewhat flattened at the north and south poles. Depending on where you measure, there is a different earth circumference.
- Usually you measure the circumference of the earth along the equator. The exact circumference of the earth is 40, 075.017 km . If the circumference of the earth is measured along the poles, it is only 40, 007, 863 km.
Instructions: calculate the exact circumference in km
- If you want to calculate the circumference of the earth yourself, you first need the radius of the earth. This is the distance from the earth's surface to the earth's core. This radius is 6, 371 km .
- To calculate the circumference of the earth, however, you need the diameter of the earth. To do this, multiply the radius by a factor of 2. This gives a diameter of 2 x 6, 371 km = 12, 742 km .
- Now all you have to do is multiply the diameter by the circle number Pi. In the best case, enter Pi directly into the calculator, otherwise use the rounded value of 3.14.
- The result is an earth circumference of around 40, 030 km . You cannot get any closer to the actual Earth's circumference of 40, 075, 017 km with simple mathematical means.
In the next practical tip, we'll tell you why the sky is actually blue.