Units of Measure by weight and by volume
US fluid Units of Measure (by volume/capacity) (click on any column header to sort)
||16 drops = 1/8 teaspoon
||3 teaspoons = 1 tablespoon
||1 tablespoon = 3 teaspoons
||1 cup = 8 ounces
||1 cup = 16 tablespoons
||1 pint = 2 cups = 16 fluid ounces
||1 quart = 4 cups
||1 liter = 0.264 gallons = 61.024 cubic inches
||1 gallon = 128 fluid ounces
Dry Units of Measure (by weight) (click on any column header to sort)
||1 pound = 16 dry ounces
||1 dry pint = 33.6003125 cubic inches
||1 dry quart = 67.2006 cubic inches
||1 dry gallon = one-eighth of a bushel
||1 Peck = 8 Dry Quarts = 537.6 cubic inches
Measurements are based on either weight, or volume (capacity).
There is no specific conversion between weight and volume unless you know the density of the ingredient.
However, water, at 4 °C, is often used as a standard to derive the weight of a volume specification.
For example, one cup of water (at 4 °C) weighs 236.588 grams.
A cup of popcorn, of course, weighs much less (8 grams).
Here is the USDA list of Food Item Densities for one cup of selected food items.
Both liquid measure and dry measure have the same volume.
For the most precise measurements, weigh all ingredients with a scale.