Gram
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| Gram | ||||
|---|---|---|---|---|
| Unit sign | g | |||
| Measure | Mass | |||
| Base Unit | Kilogram | |||
| Multiple of Base | 10-3 | |||
| System | SI, CGS, other | |||
| Common usage | Commonly used in cooking and food labeling | |||
| Examples | ||||
| One millilitre of water is 1 g Typical coins: a euro is 7.5 g and a US penny is 2.5 g |
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| Conversion | ||||
| SI | 10 dg= 1 g = 0.1 dag = 0.001 kg | |||
| Imperial | 1 g ≈ 0.0353 ounce ≈ 0.00220 pound | |||
| see also: Orders of magnitude (mass) | ||||
| Next units | ||||
| decigram | < | Gram | < | decagram |
- For other uses of the words gram or gramme, see gram (disambiguation).
The gram or gramme (Greek/Latin root grámma); symbol g, is a unit of mass.
Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a meter, and at the temperature of melting ice"[1] (later 4 °C), a gram is now defined as one one-thousandth of the SI base unit, the kilogram, or 1×10−3 kg, which itself is defined as being equal to the mass of a physical prototype preserved by the International Bureau of Weights and Measures.
Contents |
[edit] Examples
All masses are approximate:
- Plastic pen cap (Bic): 1 gram
- A single Smartie: 1 gram
- A teaspoon of salt: 4.745 grams
- Paper clip: 0.5 grams to 1.5 grams
- Typical sheet of A4 paper: 5 grams
- 1 US banknote (any denomination): 1 gram[1]
- United States nickel: 5 grams (very accurate when new)[2]
- A Skittle= approx. 1 gram
[edit] Other Abbreviations
- Sometimes also abbreviated 'gm' or 'gr'.
- However 'g' should be used rather than 'gm' or 'gr'.
[edit] History
It was the base unit of mass in the original French metric system and the later centimetre-gram-second (CGS) system of units. The word originates from late Latin gramma - a small weight.
[edit] Uses
The gram is today the most widely used unit of measurement for non-liquid ingredients in cooking and grocery shopping worldwide. For food products that are typically sold in quantities far less than 1 kg, the unit price is normally given per 100 g.
Most standards and legal requirements for nutrition labels on food products require relative contents to be stated per 100 g of the product, such that the resulting figure can also be read as a percentage.
[edit] Conversion factors
- 1 grain = 0.06479891 gram
- 1 ounce (avoirdupois) = 28.349523125 grams
- 1 ounce (troy) = 31.1034768 grams
