Comment on Ask HN: Do you know any useful "Back of the Envelope Calculations"?Comments−nailer15yTwo:* Golden ratio is also miles to ks. Which means you can use Fibonacci to convert miles to ks.* Divide by square route of two for compound doubling time.−zalew15ykilometer is km not ks. just sayin'−nailer15yOne is an abbreviation. The other is a coloquial term, pronounced 'kays' used in most western speaking metric countries.
Comments
Two:
* Golden ratio is also miles to ks. Which means you can use Fibonacci to convert miles to ks.
* Divide by square route of two for compound doubling time.
kilometer is km not ks. just sayin'
One is an abbreviation. The other is a coloquial term, pronounced 'kays' used in most western speaking metric countries.