Cooking conversion calculators

How to choose and check a conversion

Cooking volume tools convert measured space, not ingredient mass. Cups, tablespoons, teaspoons, fluid ounces, milliliters, liters, pints, quarts, and gallons can be compared when the same regional convention is used. U.S. and imperial volumes are not interchangeable.

A cup of flour and a cup of water occupy similar volume but have different mass because their densities differ. Do not use a volume-only tool to infer grams unless a trustworthy ingredient-specific density or recipe conversion is provided.

For better results, use level measures for dry ingredients, read liquid measures at eye level, and follow the measurement system printed in the recipe. Baking is usually more repeatable with a kitchen scale.

Accuracy and sources

Convertly keeps additional precision during calculation and rounds the display for readability. Match the final precision to the source measurement and the purpose of the answer. See our methodology and source policy for definitions, primary references, limitations, and correction procedures.

Exact definitions, estimates, and rounding

Some unit relationships are exact definitions, while a measured input is still limited by the instrument used to obtain it. A calculator can correctly apply an exact factor without making the original measurement more precise. Keep the original unrounded value, perform the conversion, and round the final result to a level appropriate for the task.

Use the stated formula to check the direction of the conversion. When possible, test a familiar value such as 1, 10, or 100 before relying on an unfamiliar result. For professional, regulated, health, safety, or contractual work, confirm the required convention and rounding rule in the controlling standard or document.