Dosage Calculations: Abbreviations/Conversions

Oz

ounce

TBS or tbs

tablespoon

Tsp or tsp

teaspoon

Gtt

Drop

kg

kilogram

lb

pound

G or g

gram

mg

milligram

mcg

microgram

L

liter

ml or mL

milliliter

gr

grains (gr 10 or grX)

po or PO

per os (by mouth) or orally

sl or SL

sublingually (under the tongue)

IV

intravenously

PR

per rectum

IM

intramuscular

SQ or sc or sq

subcutaneous

ID

intradermal (just under the skin)

topically

on top of the skin

buccal

between the teeth and gum

Q or Q bar

every

D or d

daily

U

units

mEq

milliequivalents

QOD

every other day

HS

hours of sleep or “at bedtime”

PRN

as needed

Q2 hours

every two hours

H or h

hours

BID

twice daily

TID

three times daily

1 ounce (mL)

30 mL

16oz (lb)

1 lb

1TBS (mL)

15 mL

1tsp (mL)

5mL

1kg (lb)

2.2lbs

1kg (G)

1000 G

1g (mg)

1000 mg

1mg (mcg)

1000 mcg

1L (mL)

1000 mL

gr1 (mg)

60mg

1Kg (G)

1000 G

3tsp (TBS)

1tbs

1 cup (oz)

8oz

8oz (mL)

240mL

1 quart (mL)

1000 mL

1L (quart)

1 quart

1 quart (mL)

1000 mL