Cooking Measurement Converter

Recipes rarely use a single measurement system, and that's where conversion between teaspoons, tablespoons, cups, fluid ounces, and milliliters earns its keep. Cooks routinely pull recipes from cookbooks and sites written for other countries, where a quantity in milliliters means nothing next to a measuring cup. Translating those amounts cleanly keeps a dish on track, trims waste, and takes the guesswork out of adapting a recipe written for someone else's kitchen.

Behind the tool sits a set of fixed conversion factors for US customary units, taken from their definitions in milliliters in NIST Handbook 44: one tablespoon is exactly 3 teaspoons (half a fluid ounce), a cup is exactly 8 fluid ounces, and one US fluid ounce is 29.5735 milliliters. Once you enter an amount and pick the unit you're converting from, the calculator turns it into milliliters and lists the equivalent in every other unit at once.

US customary and imperial measures don't always line up: a British fluid ounce is 28.41 milliliters against 29.57 for the US one, and a British pint holds 20 fluid ounces rather than 16. The calculator uses US units only, so it's worth confirming which standard a recipe assumes. This tool also works in volume rather than weight, which matters for dry goods: a cup of flour or sugar can vary in mass depending on how it's packed, making volume less reliable than a scale. For baking dry ingredients, weighing tends to win, but for liquids these volume conversions hold up well.