### Quick Answer

**There are 1,000 grams in 1 kilogram.** Grams are the metric system unit of measure for mass. Kilo is the metric system prefix meaning 1,000 of the base unit.

### Full Answer

The metric system is the measurement standard used in engineering and most scientific disciplines. The system is based on measurements for:

- Mass — grams
- Length — meters
- Volume — liters
- Temperature — degrees Celsius

Amounts are expressed in fractions or multiples of 10 and identified by adding a standard set of prefixes to the base unit. In measuring mass, some units for fractions of a gram are:

- Nanogram = 1,000,000,000th of a gram
- Microgram = 1,000,000th of a gram
- Milligram = 1,000th of a gram
- Centigram = 100th of a gram
- Decigram = 10th of a gram

Some units for multiples of a gram are:

- Decagram = 10 grams
- Hectogram = 100 grams
- Kilogram = 1,000 grams
- Megagram = 100,000 grams
- Gigagram = 1,000,000,000 grams