Conversion charts


 

UK Ring Sizes & Conversion Charts

There is no substitute for having your finger measured professionally, but it's not an exact Science.
Our fingers change in size from morning to evening, month to month and even Winter to Summer.
The following Chart is helpful to see how the sizes are compiled.

 

 
Inside Inside Inside Inside Number Sizes Wheat Sheaf    
Diameter Diameter Circumference Circumference US/Canada British Japanese Swiss
(inches) (mm) (inches) (mm) Standard Irish Equivalent Equivalent
       

 

Australian    
          Equivalent    
0.458 11.6 1.438 36.5 0      
0.466 11.8 1.463 37.2 1/4      
0.474 12.0 1.488 37.8 1/2 A    
0.482 12.2 1.513 38.4 3/4 A 1/2    
0.490 12.4 1.539 39.1 1 B 1  
0.498 12.6 1.564 39.7 1 1/4 B 1/2    
0.506 12.9 1.589 40.4 1 1/2 C    
0.514 13.1 1.614 41.0 1 3/4 C 1/2    
0.522 13.3 1.639 41.6 2 D 2 1.50
0.530 13.5 1.664 42.3 2 1/4 D 1/2    
0.538 13.7 1.689 42.9 2 1/2 E 3 2.75
0.546 13.9 1.714 43.5 2 3/4 E 1/2    
0.554 14.1 1.740 44.2 3 F 4 4.00
0.562 14.3 1.765 44.8 3 1/4 F 1/2 5 5.25
0.570 14.5 1.790 45.5 3 1/2 G    
0.578 14.7 1.815 46.1 3 3/4 G 1/2 6 6.50
0.586 14.9 1.840 46.7 4 7  
0.594 15.1 1.865 47.4 4 1/4 H 1/2   7.75
0.602 15.3 1.890 48.0 4 1/2 8  
0.610 15.5 1.915 48.7 4 3/4 J   9.00
0.618 15.7 1.941 49.3 5 J 1/2 9  
0.626 15.9 1.966 49.9 5 1/4 K   10.00
0.634 16.1 1.991 50.6 5 1/2 K 1/2 10  
0.642 16.3 2.016 51.2 5 3/4 L   11.75
0.650 16.5 2.041 51.8 6 L 1/2 11 12.75
0.658 16.7 2.066 52.5 6 1/4 12  
0.666 16.9 2.091 53.1 6 1/2 M 1/2 13 14.00
0.674 17.1 2.116 53.8 6 3/4 N    
0.682 17.3 2.141 54.4 7 N 1/2 14 15.25
0.690 17.5 2.167 55.0 7 1/4    
0.698 17.7 2.192 55.7 7 1/2 O 1/2 15 16.50
0.706 17.9 2.217 56.3 7 3/4    
0.714 18.1 2.242 56.9 8 P 1/2 16 17.75
0.722 18.3 2.267 57.6 8 1/4    
0.730 18.5 2.292 58.2 8 1/2 Q 1/2 17  
0.738 18.7 2.317 58.9 8 3/4 R   19
0.746 18.9 2.342 59.5 9 R 1/2 18  
0.754 19.2 2.368 60.1 9 1/4 S   20.25
0.762 19.4 2.393 60.8 9 1/2 S 1/2 19  
0.770 19.6 2.418 61.4 9 3/4 T   21.5
0.778 19.8 2.443 62.1 10 T 1/2 20  
0.786 20.0 2.468 62.7 10 1/4 U 21  
0.794 20.2 2.493 63.3 10 1/2 U 1/2 22 22.75
0.802 20.4 2.518 64.0 10 3/4 V    
0.810 20.6 2.543 64.6 11 V 1/2 23  
0.818 20.8 2.569 65.2 11 1/4 W   25
0.826 21.0 2.594 65.9 11 1/2 W 1/2 24  
0.834 21.2 2.619 66.5 11 3/4 X    
0.842 21.4 2.644 67.2 12 X 1/2 25 27.50
0.850 21.6 2.669 67.8 12 1/4    
0.858 21.8 2.694 68.4 12 1/2 Z 26 28.75
0.866 22.0 2.719 69.1 12 3/4 Z 1/2    
0.874 22.2 2.744 69.7 13   27  
0.882 22.4 2.769 70.3 13 1/4 Z1    
0.890 22.6 2.795 71.0 13 1/2      
0.898 22.8 2.820 71.6 13 3/4 Z2    
0.906 23.0 2.845 72.3 14 Z3    
0.914 23.2 2.870 72.9 14 1/4      
0.922 23.4 2.895 73.5 14 1/2 Z4    
0.930 23.6 2.920 74.2 14 3/4      
0.938 23.8 2.945 74.8 15      
0.946 24.0 2.970 75.4 15 1/4      
0.954 24.2 2.996 76.1 15 1/2      
0.962 24.4 3.021 76.7 15 3/4      
0.970 24.6 3.046 77.4 16      

Use the PDF to excel converter if this chart doesn't print all on one page for you!

 

Capacity Measure Conversions
Metric to American
1 milliliter = 0.338 fluid ounces
1 liter = 1.057 liquid quarts or 0.9081 dry quarts
1 kiloliter = 264.18 gallons or 28.38 bushels

American to Metric (Liquid)
1 fluid ounce = 0.0296 liter
1 gill = 0.1183 liters
1 cup = 0.2366 liters
1 pint = 0.4732 liters
1 quart = 0.9464 liters
1 gallon = 3.7854 liters

American to Metric (Dry)
1 pint = 0.5506 liters
1 quart = 1.1012 liters
1 peck = 8.8098 liters
1 bushel = 35.2390 liters

 
 
 

Converting from Grams
Use this reference when using balances and scales to convert from grams to other units.

To Convert To: Multiply by:
Carats 5.0
Pennyweight 0.6430149
Troy Ounces 0.03215075
Avoirdupois Ounces 0.03527396
Grains 15.43236

 

 

 
 

Inches to Millimeters
To convert inches to millimeters:
Starting with a fraction: divide the numerator by the denominator to get a decimal. Multiply the decimal by 25.4 to get the millimeters.
Example: start with 5/8": 5 8 = .625 x 25.4 = 15.875mm

To convert millimeters to inches:
Multiply the millimeter size by .03937 to get the inch equivalent.
Example: start with 16mm: 16 x .03937 = .62992" (5/8")

inches decimals milimeters
1/64 0.01563 0.39688
1/32 0.03125 0.79375
1/16 0.0625 1.5875
1/8 0.125 3.175
1/4 0.250 6.35
1/2 0.50 12.7
1 1.00 25.4

 

 

 

 
American Wire Gauge
(AWG)
Diameter
(inches)
Diameter
(mm)
Cross Sectional Area
(mm2)
0000 0.46 11.68 107.16
000 0.4096 10.40 84.97
00 0.3648 9.27 67.40
0 0.3249 8.25 53.46
1 0.2893 7.35 42.39
2 0.2576 6.54 33.61
3 0.2294 5.83 26.65
4 0.2043 5.19 21.14
5 0.1819 4.62 16.76
6 0.162 4.11 13.29
7 0.1443 3.67 10.55
8 0.1285 3.26 8.36
9 0.1144 2.91 6.63
10 0.1019 2.59 5.26
11 0.0907 2.30 4.17
12 0.0808 2.05 3.31
13 0.072 1.83 2.63
14 0.0641 1.63 2.08
15 0.0571 1.45 1.65
16 0.0508 1.29 1.31
17 0.0453 1.15 1.04
18 0.0403 1.02 0.82
19 0.0359 0.91 0.65
20 0.032 0.81 0.52
21 0.0285 0.72 0.41
22 0.0254 0.65 0.33
23 0.0226 0.57 0.26
24 0.0201 0.51 0.20
25 0.0179 0.45 0.16
26 0.0159 0.40 0.13
 

Linear Measure Conversions
Metric to English
1 millimeter = 0.03937 inches
1 centimeter = 0.3937 inches
1 meter = 39.37 inches
1 meter = 3.2808 feet
1 kilometer = 0.621 miles

English to Metric
1 mil = 0.0254 millimeters
1 inch = 2.54 centimeters
1 foot = 0.3048 meters
1 yard = 0.9144 meters
1 rod = 5.029 meters
1 mile = 1.6093 kilometers

 

 
 

Measurement Conversion Table

 To convert from to multiply by
 Avoirdupois ounces troy ounces .91146
  grams 28.3495
  dwt 18.2291
 Avoirdupois pounds grams 453.592
  dwt 291.666
  troy ounces 14.583
 Carats grains 3.0865
  dwt .12860
  grams .2
 Cubic centimeters cubic inches .061
  fluid ounces .0338
 Cubic inches cubic centimeters 16.387
  fluid ounces .554
 dwts (pennyweights) carats 7.776
  grams 1.5552
  troy ounces .05
  avoirdupois ounces .05486
 Feet meters .3048
 Fluid ounces cubic centimeters 29.5737
  cubic inches 1.80469
 Grains carats .324
  grams .0648
  dwt .04167
  carats 5.0
  dwt .64301
  troy ounces .03215
 Inches millimeters 25.40
  meters .0254
 Kilograms avoirdupois ounces 2.2046
  troy ounces 32.1507
  dwt 643.014
  pounds 2.20
 Meters feet 3.2808
 Millimeters inches .03937
 Pounds kilograms .4535
 Troy Ounces grams 31.1035
  avoirdupois ounces 14.583
  dwt 20
  avoirdupois pounds .06857

 

 

 
 

Measurement Equivalents
1 meter (m) = 10 decimeters (dm) = 100 centimeters (cm) = 1000 millimeters (mm)

1 meter (m) = 0.1 decameter (dkm) = 0.01 hectometer (hm) = 0.001 kilometer (km)

1 meter (m) = 39.37 in., U.S. Standard = 39.370113 in., British Standard

1 millimeter (mm) = 1000 microns () = 0.03937 in. = 39.37 mils.

 

 
 

RPM Formula
To determine RPM using various positions on a stepped pulley, use this formula: motor pulley diameter arbor pulley diameter motor speed = RPM achieved. Below are RPMs for a 1725rpm motor:

 Motor Pulley   Arbor Pulley   Motor Speed   rpm
 2" 2" 1725 = 1725
 2" 3" 1725 = 1150
 3" 2" 1725 = 2588
 3" 4" 1725 = 1294
 4" 3" 1725 = 2300
 

 
 

Surface Area Conversions
Metric to English
1 sq. centimeter = 0.15499 sq. inches
1 sq. meter = 1.196 sq. yards
1 sq. kilometer = 0.386 sq. miles

English to Metric
1 sq. inch = 6.452 sq. centimeters
1 sq. foot = 929.03 sq. centimeters
1 sq. yard = 0.8361 sq. meters
1 sq. rod = 25.292 sq. meters

 

 
 

Volume (Measure) Conversions
Metric to English
1 cubic centimeter = 0.06102 cubic inches
1 cubic meter = 35.314 cubic feet

English to Metric
1 cubic inch = 16.387 cubic centimeters
1 cubic foot = 0.0283 cubic meters
1 cubic yard = 0.7646 cubic meters
1 cord foot = 0.453 cubic meters
1 cord = 3.625 cubic meters

 

 
 

Weight (Mass) Conversions
Troy to Metric
1 grain = 0.0648 grams
1 pennyweight = 1.5552 grams
1 troy ounce = 31.1035 grams
1 troy pound = 373.24 grams

Carat to Metric
1 grain = 0.648 grams
1 carat = 200 milligrams
1 point = 2 milligrams

Avoirdupois to Troy
1 grain = 1 grain
1 ounce Avoir. = 0.914 troy ounce
1 pound Avoir. = 14.5833 troy ounce

Avoirdupois to Metric
1 grain = 0.0648 grams
1 ounce Avoir. = 28.3495 grams
1 pound Avoir. = 453.59 grams
2.2 pounds Avoir. = 1 kilogram
1 short ton = 907.18 kilograms
1 short ton = .90718 metric tons

Carat to Avoirdupois
1 carat = .007 ounces Avoir.

 

 

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