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10p? based on p I think you're in the UK? what kinda coffee is that?here a 3rd wave coffee costs around 42-50 CHF for a kilo and you need 18g for an espresso, so 0.756-0.9 CHF per espresso if I calculate 0 for amortization of equipment.

I've never done this arithmetic before. With a massively inefficient usage of a french-press, I get something like three cups of coffee from a press and perhaps 7 fillings of the press from a bag from my local store. That coffee is $6 USD when it's on sale and $8 when it's not.

Neglecting the cost of the $20 press, the water, the kettle, the rinse-water, the mug, and the heating of the water, that's about $0.33 USD / cup?

I was just using a small number for effect, but it's closer to 30p usually for Americano/Filter coffee equivalent. Point remains the same.

You forgot heating up water, electricity and your time spent on it.

Irrelevant analogy. Let me know when you can build your own Tablet.

Technical sophistication is not equal to practical value.

A translation service from Swedish to German has no practical value to me. But, I don't go on the internet dissing Google for providing that service to people who find it useful