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August 11, 2019

Experts' Expert: How a mathematician converts miles to kilometers

Screen Shot 2019-08-10 at 11.56.49 AM copy

• 1 mi ≈ 1.609 km

• The ratio of consecutive Fibonacci numbers Fₙ₊₁/Fₙ tends to the golden ratio φ ≈ 1.618 as n increases

• So Fₙ mi ≈ Fₙ₊₁ km

[via Tamás Görbe]

August 11, 2019 at 10:01 AM | Permalink


Great trick! For some reason I've gotten it in to my head that a mile is around 1.8 km, but this I ought to remember. I actually feel a tiny bit proud, because the first thought that popped into my head after looking at the three conversion examples was indeed the Fibonacci sequence.

Posted by: Pippi | Aug 13, 2019 5:56:49 PM

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