# Definition:Gram

## Definition

The gram is the CGS base unit of mass.

It is defined as the mass of a cubic centimetre water at the temperature of melting ice.

In the SI unit system, one gram is defined as $\dfrac 1 {1000}$ of a kilogram.

### Symbol

The symbol for the gram is $\mathrm g$.

## Historical Note

The gram was defined on 7 April 1795 to be equal to:

the mass of a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice.

## Linguistic Note

The original British English spelling of gram was gramme.

However, this is rarely used nowadays, as the American gram is now the international standard.