Paste the full ingredient list, set a multiplier, and every line scales and converts to metric at once. Free to embed, no sign-up.
A plain iframe. Paste it into your post or sidebar; nothing to maintain on your end.
It converts every ingredient to grams and metric, in one pass. That is the actual point. Nobody needs help doubling a number, but nobody has flour, sugar, and honey's gram-per-cup weights memorised either. Do this by hand for an 8-ingredient recipe and you are cross-referencing a density chart eight separate times. This does all eight at once, correctly, because it is the same verified data behind the rest of this site.
It thinks in servings, not multipliers, when you also want more or less of it. "This makes 4, I need to feed 9" is how people actually think, not "2.25 times." That part is a convenience on top of the conversion, not the reason to use it.
It rounds to what you can actually measure. "2.33 cups" isn't a real thing you can spoon out. Scaled volumes round to the nearest 1/8 cup or 1/4 tablespoon/teaspoon, the increments real measuring tools come in.
It flags the two things that genuinely need a second look: keeping baking soda in balance with its acid, and bake time not scaling the way ingredients do. Read the reasoning and sources behind this, including a mistake we made and fixed, on the recipe scaling science page.
Cups, tablespoons, teaspoons, millilitres, litres, grams, kilograms, ounces, and pounds. Fractions work too ("1 1/2 cups"). For the same nine ingredients as the kitchen widget, it also shows the gram weight alongside the scaled volume.