A gram is a metric unit of weight and mass. The metric grain is a weight unit. The grain is a decimal unit of weight based on the gram. Medications given in the hospital, nursing home and other health-care settings can be ordered in metric grams or metric grains. Confusing grams and grains could result in a significant medication error or even death. The abbreviation for a grams is g. The abbreviation for a grain is gr.

### Step 1

Remember that a gram is equal to 15.4323584 grains. The grain can be rounded off to 15. Multiply the number of grams you have by 15 to get the number of grains.

1 gram is = 15 metric grains. 1 g. X 15 = 15 metric grains.

3 grams is = 45 metric grains. 3 g. X 15 = 45 grains.

5 gram is = 75 metric grains. 5 g. X 15 = 75 grains.

### Step 2

The process of converting grains to grams is completed by division. Divide the grains by 15 to get the number of grams.

75 grains divided by 15 = 5 grams.

75 grains is equal to 5 grams.

### Step 3

Use a calculator to check the multiplication and division of the conversion from grams to grains and grains to grams.