A measurement quiz. I only got half of them right since I don't apply these measurements very often. How many can you get right? http://www.ucook.com/news2.cfm?item_no=1036

The three 4 inch long measuring spoons, link by a split ring, measure a dash, a pinch, and a smidgen, respectively, and are a great help when exact measurements are not supplied but a consistent result is desired....

1 pinch approx 7 grams
1 teaspoon approx 15 grams
1 tablespoon approx 30 grams
1 cup is 250 grams
1 kg is 1000 grams

sometimes and i means sometimes (specific or relative gravity laws applying) liquid and mass weights definitely differ. However, as a token weight measure being used, unless the specific or relative weight differs to a point where weighing is the only option, you should be able to convert metric to imperial.

i.e. 1 pound is approximately 500 to 550 grams metric.

You're not the only cook who doesn't know that stuff. I still have to help the chef and the sous at my job, when they can't figure out how many so-and-so's in a so-and-so.