What is the abbreviation for gram?

The abbreviation for gram is "g." While "gm" is also commonly used and recognized, particularly in older literature, the standard and most accepted abbreviation in scientific and medical contexts today is simply "g." This is rooted in the International System of Units (SI), which promotes the use of standardized abbreviations for units of measurement.

Understanding the use of abbreviations is essential in both clinical and research settings, as clarity and consistency in communication can greatly affect patient care and data interpretation. The other options represent different units of measurement: "kg" stands for kilogram, which is equal to 1,000 grams, and "oz" refers to ounces, a unit used primarily in the measurement of weight in the U.S. customary system.