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Weight & Measure
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Weight & Measure Conversions

Abbreviation	Meaning
a.c.	before meals
a.d.	right ear
a.s.	left ear
a.u.	both ears
ad lib.	as much as desired
amp.	ampule
aq.	water
b.i.d.	twice daily
c.	with
cap.	capsule
cc	cubic centimeter
disp.	dispense
g or gm	gram
gtt(s)	drop(s)
h.	hour
h.s.	at bedtime
IM	intramuscular
IP	intraperitoneal
IV	intravenous
lb	pound
m2	meters squared
mg	milligrams
ml	milliliter
Ut dict.	as directed

Abbreviation	Meaning
o.d.	right eye
o.s.	left eye
o.u.	both eyes
p.c.	after meals
PO	orally
p.r.n.	when required
q.	every
q4h, etc.	every 4 hours
q.i.d.	four times daily
q.o.d.	every other day
q.s. or q.s. ad	quantity sufficient to make
Rx	take
S., or Sig.	Indicates directions to be given on the label of a prescription
s.i.d.	once a day
stat	immediately
Subcut, SC	subcutaneous
SubQ, SQ	subcutaneous
susp.	suspension
tab	tablet
Tbsp.	tablespoon (15 ml)
tsp.	teaspoon (5 ml)
t.i.d.	three times daily

Dogs

Kg	M²	Kg	M²
0.5	0.06	33	1.03
1	0.10	34	1.05
2	0.15	35	1.07
3	0.20	36	1.09
4	0.25	37	1.11
5	0.29	38	1.13
6	0.33	39	1.15
7	0.36	40	1.17
8	0.40	41	1.19
9	0.43	42	1.21
10	0.46	43	1.23
11	0.49	44	1.25
12	0.52	45	1.26
13	0.55	46	1.28
14	0.58	47	1.30
15	0.60	48	1.32
16	0.63	49	1.34
17	0.66	50	1.36
18	0.69	52	1.41
19	0.71	54	1.44
20	0.74	56	1.48
21	0.76	58	1.51
22	0.78	60	1.55
23	0.81	62	1.58
24	0.83	64	1.62
25	0.85	66	1.65
26	0.88	68	1.68
27	0.90	70	1.72
28	0.92	72	1.75
29	0.94	74	1.78
30	0.96	76	1.81
31	0.99	78	1.84
32	1.01	80	1.88

Cats

Kg	M²
2.0	0.159
2.5	0.184
3.0	0.208
3.5	0.231
4.0	0.252
4.5	0.273
5.0	0.292
5.5	0.311
6.0	0.330
6.5	0.348
7.0	0.366
7.5	0.383
8.0	0.400
8.5	0.416
9.0	0.432
9.5	0.449
10	0.464

The table is derived from the equation:

Approximate Surface area in m² =

10.1 (10.0 for cats) * (weight in grams)^2/3

10000

°C	°F	°C	°F
36.0	96.8	39.8	103.6
36.5	97.7	40.0	104.0
37.0	98.6	40.2	104.4
37.5	99.5	40.4	104.7
38.0	100.4	40.6	105.1
38.2	100.8	40.8	105.4
38.4	101.1	41.0	105.8
38.6	101.5	41.2	106.2
38.8	101.8	41.4	106.5
39.0	102.2	41.6	106.9
39.2	102.6	41.8	107.2
39.4	102.9	42.0	107.6
39.6	103.3

Calculations based on the modified formulas:

°C = (°F - 32) * (0.5555) and °F = (°C) * (1.8) + 3

Note: 0.5555 substitutes 5/9 and 1.8 substitutes 9/5 in original formulas.
Results are rounded to one decimal place.

Weight Equivalents

Household Measures		Abbreviations
1 gt = 0.06 mL		gt = drop
15 gtt = 1 mL		gtt = drops
1 tsp = 5 mL		mL = milliliter(s)
3 tsp = 1 tbsp		tsp = teaspoon(s)
1 tbsp = 15 mL		tsp = teaspoon(s)
1 jigger = 45 mL		tbsp = tablespoon(s)
1 teacup = 180mL
1 glass = 240 mL
1 measuring cup = 240 mL

Metric Measures		Abbreviations
1 metric ton = 1,000 kg		av. = avoirdupois
1 metric ton = 2,203 lb (av.)		g = gram(s)
1 kg = 1,000 g		kg = kilogram(s)
1 kg = 2.203 lb (av.)		mg = milligram(s)
1 g = 1,000 mg		mcg = microgram(s) (it is also abbreviated as µg)
1 g = 0.035 oz (av.)		lb = pound(s)
1 mg = 1,000 mcg		ng = nanogram(s)
1 mcg = 0.001 mg		oz = ounce(s)
1 ng = 0.000001 mg

Avoirdupois* Measures		Abbreviations
1 lb = 16 oz		g = gram(s)
1 ton = 2,000 lb		kg = kilogram(s)
1 oz = 28.35 g		lb = pound(s)
1 lb = 454 g		oz = ounce(s)
1 lb = 0.454 kg		ton (2,000 lb) is also called short ton
1 ton = 907.2 kg
1 ton = 0.907 metric tons

* Avoirdupois is the common system of measuring in the USA.

Some Apothecary* Measures		Abbreviations
1 gr = 1/20 scr (or 0.05 scr)		dr = dram(s)
1 gr = 65.8 mg		g = gram(s)
1 scr = 20 gr		gr = grain(s)
1 scr = 1.3 g		scr = scruple(s)
1 dr = 3 scr
1 dr = 3.9 g
1 mg = 0.015 gr
1 g = 15.43 gr
1 oz = 8 dr

* The apothecary measure system has been traditionally used by druggists and pharmacists.

Dosage Conversion Factors
To convert mg/lb to mg/kg: mg/kg = mg/lb * 2.2
To convert mg/kg to mg/lb: mg/lb = mg/kg * 0.454
1 ppm = 1mcg/g or 1 mg/kg

Capacity or Volume Equivalents

Metric Measures		Abbreviations
1 L = 1,000 mL		av. = avoirdupois
1 mL = 1 cc		cc = cubic centimeter(s)
30 mL ≈ 1 fl. oz (av.)		fl oz = fluid ounce(s)
250 mL ≈ 8 fl. oz (av.)		gal = gallon(s)
500 mL ≈ 16 fl. oz (av.)		L = liter(s)
0.5 L ≈ 1pt (av.)		mL = milliliter(s)
1,000 mL ≈ 32 fl. oz (av.)		pt = pint(s)
1 L ≈ 1 qt (av.)		qt = quart(s)
100 L = 26.5 gal. (av.)

* The ≈ symbol means approximately equal

Avoirdupois* Measures		Abbreviations
1 fl oz = 29.57 mL		av. = avoirdupois
1 pt = 16 fl. oz		fl oz = fluid ounce(s)
1 pt = 473.2 mL		gal = gallon
1 qt = 2 pt		pt = pint(s)
1 qt = 0.946 L		qt = quart(s)
1 gal = 4 qt
1 gal = 3.785 L

* Avoirdupois is the common system of measuring in the USA

Some Apothecary* Measures		Abbreviations
1 min = 1/60 fl. dr (0.17 fl. dr)		av. = avoirdupois
1 min = 0.06 mL		min = minim (a minim equals one drop - 0.06 mL)
1 fl. dr = 60 min		fl. dr = fluid dram
1 fl. dr = 3.7 mL		fl. oz = fluid ounce (avoirdupois)
1 fl. oz (av.) = 480 min
1 fl. oz (av.) = 8 fl. dr
1 fl. oz (av.) = 29.57 mL

* The apothecary system has been traditionally used by druggists and pharmacists

Tools

BasicDrug Calculator

AntiparasiticsAgents

InteractionsMatrix

CommonAbbreviations

Body SurfaceArea Chart

TemperatureConversions