A paperclip, a sugar packet, the cap of a pen and a raisin are all examples of things that weigh just 1 gram. A gram is a unit of measurement in the metric system used to measure mass.
A gram is the smallest measure of weight in the metric system. It is commonly seen on nutrition labels on food products, and is equivalent to 0.0353 dry ounces. After the gram, the next most common measure is the kilogram, followed by the tonne, or ton. There are 1,000 grams in a kilogram, and 1,000 kilograms in a tonne.
Some conversions to put the weight of a gram into perspective are:
- One gram is equivalent to 15.43 grains. A grain is a unit of measure roughly equivalent to a single grain of cereal, commonly wheat or barley.
- One troy ounce is equivalent to 31.103 grams. A troy ounce is most often used to measure the mass of precious metals such as gold, silver and platinum.
- One gram is equal to five carats. A carat is used to measure the mass of gemstones like diamonds, emeralds or rubies.
- One gram is the equivalent of 8.988 x 1013 joules. A joule is a unit of energy or heat. This comparison uses the mass-energy equivalence.
- The yen coin of Japan has a mass of only one gram.