Convert Measurements
Select an ingredient (optional for weight-only conversions), enter your amount and unit, then choose the target unit. Results update instantly.
1 cup
↓
240 g
Using water/generic liquid density (1 g/ml)
All Equivalents
Temperature Converter
Convert between Fahrenheit, Celsius, and Gas Mark for oven temperatures.
Quick Reference: Common Ingredient Weights
Grams per 1 cup for the most common cooking and baking ingredients.
The Complete Guide to Cooking Measurement Conversion
Accurate measurement is the difference between a recipe that works perfectly and one that fails. While experienced cooks develop an intuition for quantities, anyone following a new recipe needs reliable conversions between different measurement systems. The challenge is that cooking uses two fundamentally different types of measurement: volume (how much space something takes up) and weight (how heavy it is). Converting between these requires knowing the specific density of each ingredient, which is why a generic conversion chart can lead you astray. This guide explains the measurement systems used in cooking worldwide, why density matters, and how to convert accurately between any units.
Understanding Volume vs. Weight Measurement
Volume measurements describe the three-dimensional space occupied by an ingredient. In American cooking, the primary volume units are cups (240 ml), tablespoons (15 ml), teaspoons (5 ml), and fluid ounces (29.6 ml). These measurements are convenient because they require only standard measuring tools and no scale. However, they are inherently imprecise for dry ingredients because the same volume can contain different amounts depending on how the ingredient is handled. A cup of flour that is scooped and packed can weigh 30 percent more than a cup that is spooned and leveled. Weight measurements in grams or ounces eliminate this variability entirely. A recipe calling for 125 grams of flour will produce the same result regardless of how you transfer the flour to the scale. This is why professional bakeries, patisseries, and food manufacturers worldwide use weight-based formulas rather than volume-based recipes.
The International Measurement Landscape
Different countries use different measurement conventions, which creates confusion when following international recipes. American recipes use US customary units: cups, tablespoons, teaspoons, Fahrenheit temperatures, and ounces (both fluid and weight). British recipes historically used Imperial measurements, which differ from US measurements. The Imperial cup is 284 ml versus the US cup at 240 ml, and the Imperial fluid ounce is 28.4 ml versus 29.6 ml. However, modern British recipes have largely transitioned to metric measurements. Australian and New Zealand recipes use metric units but define a tablespoon as 20 ml rather than the international standard of 15 ml, which is an important difference when measuring baking powder, spices, or other ingredients where small variations matter. Japanese recipes use their own cup size of 200 ml. European recipes are almost exclusively metric, using grams for dry ingredients and milliliters for liquids. Understanding which system a recipe uses is the critical first step before converting anything.
Density: Why the Same Cup Weighs Differently
Density is the mass per unit volume of a substance. Water has a density of almost exactly 1 gram per milliliter, which makes it the easiest ingredient to convert: 240 ml (1 cup) of water weighs 240 grams. But most cooking ingredients have densities that differ significantly from water. Flour has a density of about 0.52 grams per milliliter, meaning 1 cup (240 ml) weighs only about 125 grams, roughly half what the same volume of water would weigh. Honey has a density of about 1.42 grams per milliliter, so 1 cup weighs approximately 340 grams, more than 40 percent heavier than water. Granulated sugar sits at about 0.83 grams per milliliter, giving 1 cup a weight of 200 grams. This means that a generic cups to grams conversion is meaningless without specifying the ingredient. This converter includes density data for over 70 common ingredients to ensure accurate conversion between volume and weight units.
Practical Tips for Accurate Measuring
For dry ingredients measured by volume, always use the spoon-and-level method unless the recipe specifies otherwise. Stir the ingredient in its container to loosen it, spoon it into the measuring cup until heaping, then sweep a straight edge across the top to level it. Never tap or shake the cup, as this settles the ingredient and increases the amount. For liquids, use a transparent measuring cup set on a flat surface and check the measurement at eye level. The surface of the liquid curves up slightly at the edges (called the meniscus), and you should read the measurement at the bottom of this curve. For sticky ingredients like honey, peanut butter, or molasses, spray the measuring cup with cooking spray first so the ingredient slides out cleanly. For butter, use the markings on the wrapper if available, as they indicate tablespoon measurements. A digital kitchen scale that reads in both grams and ounces is the single most valuable measuring tool you can own, eliminating the need for volume-to-weight conversion entirely.
Temperature Conversion for Global Recipes
Oven temperatures are the other critical conversion point in international cooking. American recipes use Fahrenheit, while virtually all other countries use Celsius. The conversion formula, Celsius equals Fahrenheit minus 32 times five-ninths, produces awkward decimal numbers that are typically rounded to the nearest 5 degrees. British and some European recipes occasionally reference Gas Marks, a numbering system for gas ovens that ranges from Gas Mark 1 (275 degrees Fahrenheit, 140 degrees Celsius) to Gas Mark 9 (475 degrees Fahrenheit, 245 degrees Celsius). Each Gas Mark increment represents approximately 25 degrees Fahrenheit or 14 degrees Celsius. When converting oven temperatures, keep in mind that most home ovens have a variance of plus or minus 10 to 15 degrees from the set temperature, so precise decimal conversion is less important than knowing the general temperature range needed for your dish.
⚖ Invest in a Scale
A $15 digital kitchen scale that reads in grams eliminates the need for volume-to-weight conversion and improves recipe accuracy by 20-30%.
⚖ Spoon and Level
For dry ingredients, always spoon into the cup and level with a straight edge. Scooping directly can add 25-30% more ingredient.
⚖ Check Your Cup Size
US cups (240ml), Imperial cups (284ml), metric cups (250ml), and Japanese cups (200ml) are all different. Know which your recipe uses.
⚖ Liquid vs. Dry Ounces
Fluid ounces measure volume (29.6ml), weight ounces measure mass (28.35g). For water they are nearly equal; for other substances they differ significantly.