# Weight and Mass

- The
__Base Unit for Mass__using the Metric System (SI) is the.*Kilogram* - We use
**scales**to weigh objects. However, scales are set to give you the object's mass and not the object's weight.

**Weight is the measure of the downward force of an object due to gravity and is used to find object's Mass.**

### Metric System (SI) Units for Mass:

**1 Kilogram (kg) = 1000 Grams (g)
1 Gram (g) = 1000 Milligrams (mg)
**

### U.S. Customary Units to Metric System Units (SI):

**1 Pound (lb) = 0.453592 Kilograms (kg)
1 Ounce (oz) = 28.3495 Grams (g)
**