I found a recipe in English that mentions a "pinch" of something. English is not my first language, and Google shows that "pinch" has many meanings. Do I have to pinch it with my fingers, or can i find a suitable amount of milliliters to use?
Usually if amounts are indicated in pinches it means that exactictude is not required, and you can follow, at least in part, individual taste. If measurements are critical, like in the amount of gelatin you need for a certain texture, or certain amounts in patisserie, you will find indications in grams or ounces.
I wouldn't go crazy about finding a metric or imperial equivalent of the "pinch", also because the original recipe writer very likely did not mean it that way - you would just be obsessive, not precise.
I found this table of conversions:
Tad — 1/8th teaspoon Dash — 1/16th teaspoon (or less than 1/8th teaspoon) Pinch — 1/16th teaspoon (or 1/24th teaspoon) Smidgen (smidge, for short) — 1/32nd teaspoon (or 1/48th teaspoon) Drop — 1/60th teaspoon (or 1/80th teaspoon or 1/120th teaspoon) Hint — a trace