SWIM told me he's had 100gr of MHRB lying around for about a month or so and really wants to start extracting, but doesn't have a decent scale to weigh out reagents, and finances don't allow purchase of one ATM.

So, does anybody know the metric weight of a coffeespoon of NaOh?

Thanks man,
that's about fine.

NaOH comes in many forms and densities, so you can't guarantee that someone else's measurements will be the same as your materials.

Use a kitchen scale if you have one, there's no need to buy an electronic scale for extraction (invaluable for dosing tho). A bit over or under will make little difference to your extraction.