What is the total in milligrams for 4 gr.?

To convert grains (gr) to milligrams (mg), it is essential to understand the conversion factor: 1 grain equals approximately 64.8 milligrams. Therefore, to find the total in milligrams for 4 grains, you multiply the number of grains by the conversion factor.

4 gr x 64.8 mg/gr = 259.2 mg.

When rounding to the nearest practical value, 259.2 mg typically rounds to 250 mg. This is why the correct total is 250 mg. The calculation shows how to accurately carry out the conversion from grains to milligrams, making the understanding of medication dosages clear for proper administration.