Medication Calculations

Gram

g, gm, G, Gm unit of weight

Liter

l, L.....unit for volume or capacity

Meter

m, M.....uit for linear measurement or length

Kilo

1000

Hecto

100

Deka

10

Deci

one-tenth .1

Centi

one-hundreth .01

Milli

one-thousandth .001

Micro

one-millionth .000001

Nano

one-billionth .000000001

Kilogram

kg, Kg

Gram

g, gm, G, Gm

Milligram

mg, mgm

Microgram

mcg

Nanogram

ng

Kiloliter

kl, kL

Liter

l, L

Deciliter

dl, dL

Milliliter

ml, mL

Kilometer

km, Km

Meter

m, M

centimeter

cm

Millimeter

mm

ounce

oz

dram

dr

grain

gr

quart

qt

pint

pt

fluid ounce

fl oz

fluid dram

fl dr

minim

m

1 ounce equals how many grains

480

1 ounce

8 drams

1 dram

60 grains

1 quart

2 pints

1 pint

16 fluid ounces

1 fluid ounce

8 fluid drams

1 fluid dram

60 minims

1 minim

1 drop

1 teaspoon (t)

60 drops (gtt) 5ml

1 tablespoon (T)

3 teaspoons (t)

1 ounce (oz)

2 T

1 coffee cup

6 oz

I medium size glass

8 oz

I measuring cup

8oz

cap

capsule

dr

dram

elix

elixir

drops

gtt

square meter

m2

milliequivalent

mEq

SR

sustained release

supp

suppository

susp

suspension

T.O.

Telephone order

V.O.

verbal order

right ear

A.D., ad

left ear

A.S. as

both ears

A.U. au

intradermal

ID

intramuscular

IM

intravenous

IV

intravenous piggyback

IVPB

keep vein open

KVO

left

L

nasogastric tube

NGT

right eye

O.D.

left eye

O.S. os

both eyes

O.U. ou

by mouth

PO, po,

subcutaneous

SC, subc, sc, SQ, subQ

sublingual

SL, sl, subl

to keep open

TKO

vaginal

Vag

before meals

AC, ac

as desired

ad lib

twice a day

B.i.d, b.i.d.

hour of sleep

hs

nothing by mouth

NPO

after meals

PC, pc

whenever necessary, as needed

PRN, p.r.n.

every

q

every morning

qAM

every hour

qh

every 2 hours

q2h

every 4 hours

q4h

every 6 hours

q6h

every 8 hours

q8h

once if necessary; if there is a need

SOS

immediately

stat

three times a day

T.i.d., t.i.d.