• Question: what is the eaths perimerter

    Asked by days532tops on 26 Sep 2025.
    • Photo: Pete Webb

      Pete Webb answered on 26 Sep 2025:

      It’s 40,008 km through the N and S poles, 40,075 km round the equator. Round the equator is slightly longer because the Earth’s rotation cuases it to bulge at the equator. A good easy to remember approximation is 40,000 km or 25,000 miles.

    • Photo: Jonathan Mound

      Jonathan Mound answered on 26 Sep 2025:

      I find the 40,000 km value easy to remember as the length of a metre was initially defined based on the distance from pole to equator. So, it isn’t a coincidence that the distance from pole to equator is very close to 10,000 km.

    • Photo: Pratibha Gautam

      Pratibha Gautam answered on 2 Oct 2025:

      Imagine Earth is like a ball, but not a perfectly round one. It’s a tiny bit squashed at the top and bottom, like a playground ball you sat on.

      If you wrapped a super-long ribbon around the middle, it would be 40,075 kilometers long.
      But if you wrapped it from the North Pole to the South Pole, it would be just a little bit shorter, at 40,008 kilometers.

      So, the circumference of Earth varies according to where do you measure it from.

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