A Pharmacy Technician’s Measurement Conversions

Abbreviations Used Throughout This Chart

cubic centimeter = cc

fluid = fluid

fluidram = fl dr

gallon = gal

grain = gr

gram = g

inch = in

kilogram = kg

liter = l

microgram = mcg

milligram = mg

milliliter = ml

minim = min

ounce = oz

pint = pt

pound = lb

quart = qt

tablespoon = tbsp

teaspoon = tsp

x = multiply by

/ = divide by

# = gives an exact equivalent

 

Basic Conversion Factors/Formulas

 

To change… into… do this…

cc                                            l                                 / 1000 #

cc                                            ml                                 x 1 #

cubic feet                                 gal (UK)                      x 6.229

cubic feet                                 gal (US)                      x 7.481

cubic feet                                 l                                 x 28.32

cubic in                                 l                                 x 0.01639

fl oz (UK)                                 fl oz (US)                      x 0.961

fl oz (UK)                                 ml                                 x 28.41

fl oz (US)                                 fl oz (UK)                      x 1.041

fl oz (US)                                 ml                                 x 29.57

gal                                            pt                                 x 8 #

gal (UK)                                 cubic feet                      x 0.1605

gal (UK)                                 gal (US)                      x 1.2009

gal (UK)                                 l                                 x 4.54609 #

gal (US)                                 cubic feet                      x 0.1337

gal (US)                                 gal (UK)                      x 0.8327

gal (US)                                 l                                 x 3.785

g                                            kg                                 / 1000 #

g                                            oz                                 / 28.35

kg                                            oz                                 x 35.3

kg                                            lb                                 x 2.2046

l                                            cubic in                      x 61.02

l                                            gal (UK)                      x 0.2200

l                                            gal (US)                      x 0.2642

l                                            pt (UK)                      x 1.760

l                                            pt (US)                                 x 2.113

oz                                            g                                 x 28.35

pt (UK)                                 l                                 x 0.5683

cubic feet                                 gal (UK)                      x 6.229

pt (UK)                                 pt (US)                                 x 1.201

cubic feet                                 gal (US)                      x 7.481

pt (US)                                            l                                 x 0.4732

pt (US)                                            pt (UK)                      x 0.8327

lb                                            kg                                 x 0.4536

lb                                            oz                                 x 16 #

Approximate Liquid Measurements (Metric to English)

1 cc = 1 ml

5 ml = 1 tsp

15 ml = 1 tbsp

30 ml = 1 oz

480 ml = 1 pt

3840 ml = 1 gal

Approximate Liquid Measurement Equivalents (English to Metric)

1 tsp = 5 ml

1 tbsp = 15 ml

1 fl oz = 30 ml

1 cup (8 fl oz) = 240 ml

1 pt (16 fl oz) = 480 ml

1 qt (32 fl oz) = 960 ml

1 gal (128 fl oz) = 3800 ml

 

 

Exact Liquid Measurement Equivalents (English to English)

3 tsp = 1 tbsp

2 tbsp = 1 oz

16 oz = 1 pt

2 pt = 1 qt

1 qt = 32 fl oz

4 qt = 1 gal

1 gal = 128 fl oz

Exact Liquid Measurement Equivalents (Metric to Metric)

1 l = 1000 ml

 

Exact Liquid Measurement Equivalents (English to Metric)

1 min = 0.06 ml

1 fl oz = 29.57 ml

1 pt = 473.2 ml

1 qt = 946.4 ml

 

Exact Dry Mass and Solid Weight Metric Equivalents (Metric to Metric)

1 kg = 1000 g

1 g = 1000 mg

1 mg = 1000 mcg

0.1 mg = 1/600 grain (gr)

0.12 mg = 1/500 gr

0.15 mg = 1/400 gr

0.2 mg = 1/300 gr

0.3 mg = 1/200 gr

0.4 mg = 1/150 gr

0.5 mg = 1/120 gr

0.6 mg = 1/100 gr

0.8 mg = 1/80 gr

1 mg = 1/65 gr

Exact Dry Mass and Solid Weight Measurement Equivalents (Metric to English)

1 kg = 2.2 lbs

1 g = 15.43 gr

1 gr = 64.8 mg

1 oz = 28.35 g

1 lb = 453.6 g (0.4536 kg)

Approximate Dry Mass and Solid Weight Measurement Equivalents (English to Metric)

1 gr = 60 mg

15 gr = 1 g

1 lb = 454 g

1 oz = 30 g

16 oz = 1 lb

Exact Apothecary Liquid Measurement Equivalents (English Apothecary Standards to English Apothecary Standards)

60 min = 1 fl dr

Exact Apothecary Liquid Measurements (English Units to English Units)

16 fl oz = 1 pt

 

Approximate Apothecary Liquid Measurement Equivalents (English Apothecary Standards to English Units)

8 fl dr = 1 fl oz

480 min = 1 fl oz

 

Approximate Apothecary Liquid Measurement Equivalents (English Units to English Apothecary Standards)

1 fl oz = 480 min

1 fl oz = 8 fl dr

Approximate Apothecary Liquid Measurement Equivalents (English Apothecary Standards to Metric Units)

15 min = 1 ml

10 min = 0.6 ml

1 tsp = 5 ml

1tbsp = 15 ml

1 fl oz = 30 ml

1 qt = 960 ml

 

Exact Apothecary Liquid Measurement Equivalents (English Apothecary Standards to Metric Units)

1 tsp = 5 ml

1 tbsp = 15 ml

1 fl oz = 29.57 ml

1 qt = 946 ml

Exact Apothecary Liquid Measurement Equivalents (Metric to English Apothecary Standards)

1 ml = 16.23 min

 

Temperature Equivalents and Conversions

1 Centigrade/Celsius degree = 1.8 Fahrenheit degrees

1 Fahrenheit degree = 5/9 Centigrade/Celsius degrees

To change Fahrenheit to Centigrade/Celsius: (°F – 32) x 5/9 = °C

To change Centigrade/Celsius to Fahrenheit: (°C x 9/5) + 32 = °F

Further Pharmacy Tech Resources

  • Accuracy in Measurements — The University of North Carolina provides an overview of the different pharmacy measurement systems on this page.
  • AHRQ: Pharmacy Health Literacy — This site will help pharmacists and pharmacy techs better serve their patients through the provision of tools to help improve drug and healthcare literacy.
  • Drug Interactions — Drug Interactions has this great resource that helps pharmacy techs check the potential interactions between two or more drugs.
  • Essential Medicines — The model list of medicines that the World Health Organization suggests for every healthcare system in the world can be found via this link.
  • FDA: Drugs — All sorts of good information on drugs, the approval process for new treatments, and more is found on this page from the Food and Drug Administration.
  • First Course in Pharmacokinetics and Biopharmaceutics — This page introduces pharmaceutical science, and it includes information on drug absorption and much more.
  • Medicare Drug Benefit Glossary — Help Medicare patients understand their part D coverage with this handy glossary of frequently used terms.
  • Pharmacy Choice — On this page, pharmacist technicians can keep up to date with all of the latest news that affects pharmacies across the United States.
  • Pharmacy Practice Tools — The tools on this page from the National Community Pharmacists Association are designed to help pharmacists and pharmacist technicians keep up to date on recent laws, and it also has resources for doing presentations on drugs and pharmacies in the local community.
  • Pill Identifier — Drugs.com offers this excellent resource designed to help pharmacists and the general public identify pills on sight.