Ruler

http://www.manyhorses.com/metric_conversion_tips.htm

Millimeters to Inches Conversion Chart

1 inch = 25.4mm
Size in mm Closest equivalent in Inches
1mm just over 1/32 of an inch
2mm just over 1/16 of an inch
3mm 1/8 of an inch
4mm 5/32 of an inch
5mm 3/16 of an inch
6mm 1/4 of an inch
7mm 9/32 of an inch
8mm 5/16 of an inch
9mm 11/32 of an inch
10mm 3/8 of an inch
11mm 7/16 of an inch
12mm 15/32 of an inch
13mm 1/2 of an inch
14mm 9/16 of an inch
15mm 19/32 of an inch
16mm 10/16 of an inch
17mm 11/16 of an inch
18mm 23/32 of an inch
19mm 3/4 of an inch
20mm 13/16 of an inch
25mm 15/16 of an inch

1mm = 1/32" 8mm = 5/16"
2mm = 1/16" 9mm = almost 3/8"
3mm = 1/8" 10mm = 5/16"
4mm = 5/32" 11mm = 7/16"
5mm = 3/16" 12mm = almost 1/2"
6mm = almost 1/4" 20mm = almost 13/16"
7mm = almost 1/4" 25mm = almost 1"
Inches to MM: (in * 25.4)
1/8" = 4mm 1/2" = 12.5mm
1/4" = 6.5mm 1" = 25.4mm

Understand and remember the basic comparison of inches to centimeters.
One inch equals 2.54 cm, and 1 cm equals .39 inch.

1 Centimeter = 10 Millimeters

1                 10
2                 20
3                 30
4                 40
5                 50
6                 60
7                 70
8                 80
9                 90
10                100
11                110
12                120

Centimeter Inch Centimeter Inch Centimeter Inch Centimeter Inch
1          0.393700787 26 10.23622046 51 20.07874014 76 29.92125981
2          0.787401574 27 10.62992125 52 20.47244092 77 30.3149606
3          1.181102361 28 11.02362204 53 20.86614171 78 30.70866139
4          1.574803148 29 11.41732282 54 21.2598425 79 31.10236217
5          1.968503935 30 11.81102361 55 21.65354329 80 31.49606296
6          2.362204722 31 12.2047244 56 22.04724407 81 31.88976375
7          2.755905509 32 12.59842518 57 22.44094486 82 32.28346453
8          3.149606296 33 12.99212597 58 22.83464565 83 32.67716532
9          3.543307083 34 13.38582676 59 23.22834643 84 33.07086611
10         3.93700787 35 13.77952755 60 23.62204722 85 33.4645669
11         4.330708657 36 14.17322833 61 24.01574801 86 33.85826768
12         4.724409444 37 14.56692912 62 24.40944879 87 34.25196847
13         5.118110231 38 14.96062991 63 24.80314958 88 34.64566926
14         5.511811018 39 15.35433069 64 25.19685037 89 35.03937004
15         5.905511805 40 15.74803148 65 25.59055116 90 35.43307083
16         6.299212592 41 16.14173227 66 25.98425194 100 39.3700787
17         6.692913379 42 16.53543305 67 26.37795273 125 49.21259838
18         7.086614166 43 16.92913384 68 26.77165352 150 59.05511805
19         7.480314953 44 17.32283463 69 27.1653543 175 68.89763773
20         7.87401574 45 17.71653542 70 27.55905509 200 78.7401574
21         8.267716527 46 18.1102362 71 27.95275588 250 98.42519675
22         8.661417314 47 18.50393699 72 28.34645666 300 118.1102361
23         9.055118101 48 18.89763778 73 28.74015745 500 196.8503935
24         9.448818888 49 19.29133856 74 29.13385824 750 295.2755903
25         9.842519675 50 19.68503935 75 29.52755903 1000 393.700787

Centimeters Inches
1.00         0.39
10.00        3.94
20.00        7.87
30.00        11.81
40.00        15.75
50.00        19.69
60.00        23.62
70.00        27.56
80.00        31.50
90.00        35.43
100.00       39.37


				*Ruler*