Unit of measure

G medical abbreviation

G means "gram".

Each meaning matched at least two public references (2 in all for G), checked October 23, 2026. The table lists them.

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What G means

Also written: g.

Example

Sample label unit: "g".

A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.

Related abbreviations

  • MGmilligram; myasthenia gravis; magnesium
  • KGkilogram
  • MCGmicrogram
  • GRgrain
  • MLmilliliter
  • IUinternational unit

Elsewhere on Rivvi

Questions

What does G mean in medical terms?

G means "gram".

Where is G used?

G shows up in prescriptions and charting. Its category here is unit of measure.

Is G on the Joint Commission Do Not Use list?

No. G is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.

Source: NLM SPECIALIST Lexicon abbreviations file (LRABR); Army Regulation 40-66, Appendix B: Authorized Medical Records Abbreviations. Data as of October 23, 2026. Last updated October 23, 2026. How we source data. Spotted an error? Send a correction.

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