Gram (g)
The gram (g) is the core unit of mass in the metric system. Originating in France in the late 1700s during metrication, it was originally set as the weight of a single cubic centimeter of water at 4°C, the point of water’s greatest density. This definition grounded the gram in both practicality and scientific accuracy. As the cornerstone for all metric mass measurements, the gram supports precise calculations and global consistency. Today, it is a fundamental unit in scientific research, culinary arts, and commerce, valued for its straightforwardness and universal application.
Ounce (oz)
The ounce, symbol oz, is an imperial unit of mass derived from the Roman uncia, meaning “one-twelfth” of a pound. Standardized over centuries in England and later in the United States, one ounce is equivalent to 28.3495 grams. The ounce continues to be used for measuring food, postal items, and precious metals in regions employing imperial or US customary units. Its historical background and ongoing applications sustain its relevance alongside metric units.