The cubic meter (m³) is the SI base unit of volume, representing the space occupied by a cube one meter on each side, used in construction, shipping, and industrial processes. Water supply bills, concrete orders, and freight calculations all rely on cubic meters as their standard measurement. One cubic meter equals exactly 1,000 liters or about 264.2 US gallons.

The US cup is a volume unit equal to 8 US fluid ounces or approximately 0.2366 liters, the standard measurement in American recipes and cookbooks. When a recipe calls for 'one cup of flour' or 'half a cup of sugar,' it refers to this specific volume, not a drinking vessel of arbitrary size. One US cup equals exactly 236.588 milliliters.