How many milligrams are there in 5 grains?

To determine how many milligrams are in 5 grains, it is essential to know the conversion rate between grains and milligrams. One grain is equal to approximately 64.8 milligrams. To find the total milligrams in 5 grains, you would multiply the number of grains by the conversion factor.

Calculating this:

5 grains × 64.8 mg/grain = 324 mg

Since 324 mg is closest to 325 mg, this option is the best choice. Understanding the conversion from grains to milligrams is vital in pharmacy practice, especially when dealing with medication dosages, as many prescriptions can be written in grains while the pharmacy must dispense and measure in milligrams. Therefore, recognizing and accurately converting these units is crucial for ensuring patient safety and effective medication management.