How to get nutritional value of a recipe in gram or weight measurements?

Hi all! I see that you can input ingredient lists and get nutritional info for a home cooked meal per "serving," but I don't know how to eyeball things, so is there a way to figure out nutritional info per gram/ounces, etc? I have a food scale that I use and it would give me more accurate measurements.

There's no way to do it.

Let's imagine a super-simple recipe for tomato soup-- two cups of water, one large tomato, chopped. Put the tomato in water and cook over low heat for 20 minutes. Makes two servings.

If we both make that recipe, you might wind up with two cups of soup while I only have a cup and a half. The reason is that I cooked mine at a slightly higher temperature, and cooked more of the water off. The nutrition information will still be exactly the same per serving, but the physical serving sizes will be different.

Weigh the whole thing and divide by how many servings you get out of it.