Convert Ounce (oz) to Gigagram (Gg) instantly.
About these units
Ounce (oz)
The ounce is a unit equal to 1/16 of a pound, or approximately 28.3495 grams, with roots in ancient Roman "uncia"—one-twelfth of a pound. The ounce is used for measuring small masses in cooking, postal services, gemstones (troy ounces), and various consumer goods. Despite not being part of the metric system, the ounce remains a staple in US everyday life, from food packaging to hardware components. Its small size gives it a practical niche where grams might feel too unfamiliar for some audiences. Multiple ounce variants exist historically—avoirdupois, troy, apothecary—but the avoirdupois ounce is now the standard in general commerce. Its endurance reflects the cultural weight of imperial units and the long history of Western measurement systems.
Gigagram (Gg)
A gigagram equals 1,000 megagrams, or one million kilograms. It is used in industrial-scale output, national food production statistics, and environmental assessments, such as annual emissions of pollutants. Governments and researchers analyzing natural resource consumption, waste management, or ecological footprints frequently rely on gigagram-level reporting. The Gg sits at the intersection of human-scale systems and planetary-scale studies, offering clarity for large quantities.