The measurements I use for these recipes is based on metric for meats, canned goods, pasta, dried beans, and fresh produce. For spoon measurements, I stick with US measurements such as cup, tablespoon, teaspoon.
For measurements in 1 kilo, 500 grams, 250 grams, that is easy, 1 kilo = about 2 pounds, 500 grams = about 1 pound, and 250 grams = about 1/2 pound. Many products are packaged with the same weights as the western countries, beans and small pasta, 500 grams per bag, that is one pound that is common and average.
When I refer to can of anything, think of the average size can you seen in a grocery store, such as:
Pasta sauce (Prego) and condensed soup, 300 grams. (We keep both on hand for emergencies but normally make pasta sauce and soups here at the house.)
Veggys and such can vary by packed weight and drained weight, an example is mushrooms, corn, baked beans, black olives. All have different weights listed but the size of the can is the same.
Tomato paste I get in the 170 gram small cans, very versatile.
Whole tomatoes are a stockier can, 565 grams, drained weight is 352 grams. With canned tomatoes, uses the liquid as well. We stock this in the case we cannot get to the market, we have tomatoes to use. If a recipe calls for diced tomatoes, it takes just a few seconds to do this.
For fresh weights when a recipe calls for canned, for mushrooms use a bit over what a recipe lists for canned weight. Mushrooms also vary and there is another tip relating to that.