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Using Euro coins as weights (2004)

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180 points Tomte | 1 comments | 20 Oct 24 10:18 UTC | HN request time: 0.203s | source
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georgecmu ◴[20 Oct 24 13:53 UTC] No.41895374[source]▶
Soviet coins (at least post 1961) were designed explicitly with this application in mind.

1, 2, 3, and 5 kopeck coins weighed their value in grams. They could also be used to estimate lengths; 1 kopeck was 15 mm in diameter and 5 kopeck was 25 mm.

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t-3 ◴[21 Oct 24 02:23 UTC] No.41900174[source]▶
That's a very cool intentionally usefully design. What's the rationale behind a 3-kopeck coin though? I don't think I've seen a '3' denomination in any other currency.
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BoxOfRain ◴[21 Oct 24 08:39 UTC] No.41901950[source]▶
I think pre-decimal pound sterling coins had a 3p coin, but it makes more sense in that context.
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1. alistairSH ◴[21 Oct 24 11:07 UTC] No.41902870[source]▶
Kopecks are 100th of a ruble. If they were ever a non-decimal value, it predates the early 20th century.