Convert Ounce (oz) to Nanogram (ng) 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.
Nanogram (ng)
A nanogram equals 10⁻⁹ grams and is widely used across chemistry, toxicology, pharmaceuticals, and material science. Quantities such as trace contaminants, allergens, pesticides, or drug residues often fall in the nanogram range. In medicine, nanogram-per-liter concentrations are standard in blood tests, especially for cardiac markers like troponin, where even tiny amounts can indicate severe physiological conditions. Nanogram quantities are also important in environmental regulation and forensic science. The nanogram unit illustrates the power of modern analytical tools that can detect vanishingly small quantities with profound real-world implications.