Links: Length & Area | Weight / pound to kg | Temp | American to SI | Fluids / Volume | Milligrams | Solutions | Drips & IV Flow Rates | Pressure, Volume, Roman Numerals & Other Common Formulas | Therapeutic Drug Levels | See Body Weight Calculations | Catheter & Needle Sizes |

Online medical calculators:

http://medicineworld.org/online-medical-calculators.html

http://www.medcalc.com/

http://www.convert-me.com

http://www.globalrph.com/medcalcs.htm

Apothecary doses with metric equivalents:

1oz = 30g = 30ml.   1 grain = 60mg. 

30 grains = 2000mg = 2g.  1/60 grain = 1mg = 0.001g.  

Units of Length:  centimeters = (inches) * 2.54.

inches =  (centimeters) / 2.54.

meters = (feet) / 3.28. = (inches) / 39.4.

feet = 3.28 * (meters).

inches = 39.4 * (meters).

One inch = 2.54 centimeters.

One yard = 0.9144 meters.

1 millimeter = 0.1 centimeter = 0.0393 inches

1km = 0.6 mi. 

1 meter = 39.4 in. 

1cm = 0.4 in.

1 yd = 3 ft. = 36 in.

1 ft = 12 in.

1 in = 0.028 yd.

1 mile statute = 5280 ft. = 1,760 yards = 63,360 inches

1 mile nautical = 2,026.8 yds = 6,080.4 ft = 72,963 in.

Length Conversions: Cm –> Inches –> Feet (‘) & Inches(“):

142 56 42822

145 57 42922

147 58 421022

150 59 421122

152 60 52022

155 61 52122

157 62 52222

160 63 52322

163 64 52422

165 65 52522

168 66 52622

170 67 52722

173 68 52822

175 69 52922

178 70 521022

180 71 521122

183 72 62022

185 73 62122

188 74 62222

191 75 62322

193 76 62422

196 77 62522

198 78 62622

201 79 62722

203 80 62822

206 81 62922

208 82 621022.

Metric system of linear measure:

1 mil = 1/6400 circle = 0.05625° = 0.0625 grad

1 grad = 1/400 circle = 16.0 mils = 0°54′ = 0.9°

1 degree = 1/360 circle = about 17.8 mils = about 1.1 grad

Unit Abbr SI/metric Imperial

Angstrom = Å =.0001¼ (10-10) =.000,000,004 in.

Cable = cb = 219.456 m = 120 fathoms/720 ft.

Centimeter = cm =.01 m =.3937 in.

Chain (Gunter’s/surveyor’s) = chG = 20.1168 m = 66 feet/4 rods.

Chain (Ramden’s/engineer’s) = chR = 30.48 m = 100 ft.

Decimeter = dm =.1 m = 3.937 in.

Dekameter = dam = 10 m = 32.8 ft.

Fathom = fm = 1.83 m = 6 ft.

Foot = ft =.3048 m = 12 in.

Furlong = fur = 201.168 m = ¹D8 statute mi.

Hand (horse’s height) = 10.16 cm = 4 in.

Inch = in = 2.54 cm.

Kilometer = km = 1,000 m =.621 mi.

League = 4.8 km = 3 statute mi.

Link (Gunter’s) =.201 m = 7.92 in.

Link (Ramden’s) =.305 m = 12 in.

Meter = m = 39.37 in.

Micrometer (Micron) = ¼ (or um)=.001 mm = 3.9370×10-5 in.

Mile (statute/land) = mi = 1.609 km = 5,280 ft.

Mile (nautical/sea) = nmi = 1.85 km = 6076.11549 ft.

Millimeter = mm =.001 m =.03937 in.

Mil = mil =.0254 mm =.001 in.

Point (type size) =.353 mm =.0138 in.

Pica (type size) = 4 mm = 12 points (.1668 in).

Rod = rd = 5.029 m = 16.5 ft.

Yard = yd =.9144 m = 3 ft.

Prefixes to the base unit are used in this system to form decimal multiples and submultiples. The preferred multiples and submultiples listed below change the quantity by increments of 10³ or 10^–3. The exceptions to these recommended factors are within the middle rectangle.

Pounds to Kilograms:

Pt’s Wt in Kg = (lb/2)- 1/10 (Ex: 160= 80-8=72kg).  

1 (lb) = 0.454 kg.   1 kg = 2.2 lb (#).

lb = Kg –> 4 = 1.8,

6 = 2.7, 8 = 3.6,

10 = 4.5,

15 = 6.8, 20 = 9.1,

25 = 11.4, 30 = 13.6,

35 = 15.9, 40 = 18.2,

45 = 20.2, 50 = 22.7,

55 = 25, 60 = 27.3,

65 = 29.5, 70 = 31.8,

80 = 36.3, 90 = 40.9,

100 = 45.4, 125 = 56.7,

150 = 68.2, 175 = 79.5, 200 = 91.

Unit Abbr SI/Metric Imperial:

Dram (avdp) = dr (avdp) = 1.772 g =.0625 oz.

Grain = gr =.0648 g = 64.799 mg = .00229 oz.

Gram = g =.001 kg =.03527 oz = 15.4 gn.

One microgram (mcg) = 0.000001 grams.

Kilogram = kg = 1,000 grams (g) = 2.205 pounds.

1 mg = 1,000 micrograms (mcg)

0.6 g = 600 mg. 0.3 g = 300 mg.

0.1 g = 100 mg. 0.06 g = 60 mg.

0.03 g = 30 mg. 0.015 g = 15 mg.

0.001 g = 1 mg.

Milligram = mg =.001 g =.00003 oz.

ng = One nanogram = One billionth of a gram 10-9 = 0.000 000 001.

mcg = One microgram = One millionth of a gram 10-6 = 0.000 001.

mg = One milligram = One thousandth of a gram 10-3 = 0.001.

g = One gram = About the weight of a small paperclip.

Ounce (avdp) = oz =.0280 kg =.0625 lb.

Ounce (troy) = oz tr =.03 kg = 1.0971 oz.

Pennyweight = dwt = 1.555 g =.05486 oz.

Pound (avdp) = lb =.454 kg = 454 grams = 16 oz.

Stone = st = 6.35 kg = 14 lb.

Ton (long or British) = lt = 1,016 kg = 2,240 lb.

Tonne (metric) = mt = 1,000 kg = 2204.6 lb.

Ton (short) = sh t = 907.18 kg = 2,000 lb.

Note: avdp = avoirdupois, and was invented by London merchants in 1303.

Ounces (oz) = Grams (g)

1 ounce = 28.35 g.

4 ounces = 113.4 g

8 ounces = 226.8 g.

16 ounces = 453.6 g.

Pounds (lb.) = Grams (g)

1 pound = 453.6 g.

2 pounds  =907.2 g.

2.2 pounds  =1,000 g (1 kilogram).

Ounces = Pounds:

1 oz. = 0.06 lb. 16 oz. = 1 lb.

2 oz. = 0.12 lb. 32 oz. = 2 lb.

3 oz. = 0.19 lb. 35 oz. = 2.19 lb.

4 oz. = 0.25 lb. 48 oz. = 3.00 lb.

5 oz. = 0.31 lb. 64 oz. = 4.00 lb.

6 oz. = 0.38 lb. 71 oz. = 4.44 lb.

7 oz. = 0.44 lb. 80 oz. = 5 lb.

8 oz. = 0.50 lb. 96 oz. = 6 lb.

9 oz. = 0.56 lb. 106 oz. = 6.63 lb.

10 oz. = 0.62 lb. 112 oz. = 7 lb.

11 oz. = 0.69 lb. 128 oz. = 8 lb.

12 oz. = 0.75 lb. 141 oz. = 8.82 lb.

13 oz. = 0.81 lb. 144 oz. = 9.00 lb.

14 oz. = 0.88 lb. 160 oz. = 10 lb.

15 oz. = 0.94 lb.

Pediatric Weight Estimation:

Neonate:  =  3-3.5 kg.

At 6 mo’s: 2 X birth wt  =  6-7 kg.

At 1 year:   3 X birth wt  =  9-10 kg.

For 1-7 years:  add 2 kg/year.

For 7-12 years:  add 3 kg/year.

 Temperature: 

F –> C: 5/9(F-32).   

C –> F: (2C- 1/10) +32.

C = F –> 100 C = 212 F.

41 = 105.8

40.5 = 105, 40 = 104,

39.9 = 103.8, 39.7 = 103.5,

39.5 = 103.1, 39.2 = 102.6,

39.1 = 102.4, 39 = 102.2,

38.9 = 102, 38.6 = 101.5,

38.5 = 101.3, 38.4 = 101.1,

38 = 100.4, 37.9 = 100.2,

37.5 = 99.5, 37 = 98.6, 36 = 96.8.

35 = 95, 34 = 93.2

33 = 91.4, 32 = 89.6

31 = 87.8, 30 = 86

0 = 32.

F = (9/5 C) + 32.

C = 5/9 (F – 32).

Degrees Celsius to Kelvin: T_K = T_C + 273.15

 American (Traditional) –> SI units:

SI unit = Traditional Unit / (relative or molecular atomic mass X Factor).  There are 7 fundamental (base) SI units, meter, kg, sec, ampere, kelvin, mol, candela (luminous intensity).

Related posts:

Levels Electrolytes Failure (CHF) Stroke Cath Patterns / Withdrawing Care

Stay updated, free articles. Join our Telegram channel

Join