Cooking fails most often on measurement, not on skill. A recipe that works in one kitchen fails in another because the pan, pot or scoop was a different size. This free tool takes kitchen weights out of the guessing game. It converts kitchen weights between grams, kilograms, ounces and pounds with kitchen-friendly rounding, so an American recipe works on a European scale and back again, right in your browser, with no account and no download.
The maths behind the tool is simple and honest: the conversion factors are exact: one ounce is 28.3495 grams, one pound is 453.592 grams, and one kilogram is 1000 grams. Kitchen rounding keeps the result useful: grams to the nearest gram, kilograms to two decimals, ounces to two decimals, and pounds to two decimals. That is far more accurate than cooking needs, since a gram or two never changes a recipe.
the pairs every cook meets are worth learning: 100 grams is about 3.5 ounces, 250 grams is about 8.8 ounces, 500 grams is about 1.1 pounds, and 1 kilogram is about 2.2 pounds. American recipes usually use ounces and pounds for meat and butter, while European recipes use grams, so a converter saves you from doing the same multiplication by hand every time you bake.
Use the tool before you shop, not after. weigh ingredients instead of scooping them whenever a recipe gives grams. A cup of flour can weigh anywhere from 120 to 160 grams depending on how you scoop it, which is a 30 percent error in a cake. Weighing takes seconds, needs no conversion, and gives the same result every time, which is why professional bakers always use scales.
Watch out for the usual trap: the most common mistake is confusing fluid ounces with weight ounces. A fluid ounce measures volume, while an ounce measures weight, and they only match for water. Eight fluid ounces of honey weighs far more than eight ounces of flour. Another mistake is mixing pounds and ounces: a recipe that says 1 pound 4 ounces means 20 ounces in total, not 1.4 pounds.
Here is how a typical session goes. Open the tool, enter the numbers you already know, and read the result before you change anything else. Then change one input at a time and watch how the result moves: that single habit teaches you more about sizes than any table, because you see which input matters most. Try your own real numbers, not just the defaults, and compare the result with the pan, pot or scoop sitting in your cupboard right now. If the result surprises you, measure again: a wrong diameter or a guessed height is the usual cause, not a fault in the tool.
Plan the whole job around the number the tool gives you. If the volume changes, the cooking time, the dish size and the serving count all change with it, so check them together instead of fixing one and forgetting the rest. Write the result on the recipe card, so next time you cook the same dish you start from the right number instead of measuring again.
This tool suits beginners and experienced cooks alike. Beginners get a safe number without learning formulas, and experienced cooks get a fast check before scaling a recipe up for a party or down for two people. Both groups avoid the same waste: food that overflows, dishes that come up short, and batches that bake unevenly.
Save this page for your next cooking session. The tool is free, works on a phone or a computer, and needs no sign-up. Enter your numbers, read the result, and cook with a plan instead of hoping the size works out.
Versión en español de esta herramienta