Drafting/Conversion Table of English Linear Measurements into Metric

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The metric is now the official system of measurements for sizes and weights in the Philippines. At this writing, however, lumber, shoes, paper, and machine parts are still measured by the English system. Since it will take time to metricize all existing English measurements, the conversion table is provided below to help students adjust themselves to the transition.

The metric equivalent of the English linear measurements are printed in decimal figures and are mostly in fractions of a meter. To read these fractional measurements which are given in decimal figures, it is suggested that the following simple rule be followed:

All numbers at the left side of the decimal point are in meters; the first two numbers to the right of the decimal point are in centimeters; the third number to the right of that is in millimeters; and the rest of the numbers to the right of the third number are a fraction of a millimeter.

For example, 1.016 reads: one meter, one centimeter, and 6 millimeters. Similarly, 5.55525 is read as 5 meters, 55 centimeters, and 5 1/4 millimeters. The last two numbers, or 25, is 1/4 of a millimeter.

To find the equivalent of 3 1/8", for instance, just add the fractional metric equivalent of 1/8" to the metric equivalent of 3 inches. In this case, we have

1/8" = 0.0032 3" = 0.0762 0.0794 which reads: seven centimeters, nine millimeters, and 4/10, or 2/5, of a millimeter

Table I Inches To Meter[edit]

Inch/Inches Meter Inches Meter
1/32 0.0008 13 0.3202
1/16 0.0016 14 0.3556
1/8 0.0032 15 0.381
3/16 0.0047 16 0.4064
1/4 0.0063 17 0.4318
5/16 0.0079 18 0.4572
3/8 0.0095 19 0.4826
7/16 0.0112 20 0.508
1/2 0.0127 21 0.5334
9/16 0.0142 22 0.5588
5/8 0.0158 23 0.5842
11/16 0.0174 24(2'-0") 0.6096
3/4 0.019 25 0.635
13/16 0.0205 26 0.6604
7/8 0.022 27 0.6858
15/16 0.0237 28 0.7112
1 0.0254 29 0.7366
2 0.0508 30 0.762
3 0.0762 31 0.7874
4 0.1016 32 0.8128
5 0.127 33 0.8382
6 0.1524 34 0.8636
7 0.1778 35 0.889
8 0.2032 36(3'-0") 09144
9 0.2286 37 0.9398
10 0.254 38 0.9652
11 0.2794 39 0.9906
12(1'-0") 0.3048 40 1.016


Table II Feet To Meters[edit]

Feet Meters Feet Meters
1 0.3048 14 4.2672
2 0.6096 15 4.5720
3 0.9144 16 4.8768
4 1.2192 17 5.1816
5 1.5240 18 5.4864
6 1.8288 19 5.7912
7 2.1336 20 6.0960
8 2.4384 21 6.40
9 2.7432 22 6.71
10 3.0480 23 7.01
11 3.3528 24 7.32
13 3.9624


Table III Inches To Millimeters[edit]

Inch/Inches Millimeters Inch/Inches Millimeters
1/32 0.8 21/32 16.7
1/16 1.6 11/16 17.5
3/32 2.4 23/32 18.3
1/8 3.2 3/4 19.1
5/32 4.0 25/32 19.9
3/16 4.8 13/16 20.7
7/32 5.6 27/32 21.5
1/4 6.4 7/8 22.3
9/32 7.1 29/32 23.1
5/16 7.9 15/16 23.9
11/32 8.7 31/32 24.7
3/8 9.5 1 25.4
13/32 10.3 2 50.8
7/16 11.1 3 76.2
15/32 11.9 4 101.6
1/2 12.7 5 127.0
17/32 13.5 6 152.4
9/16 14.3 7 177.8
19/32 15.1 8 203.2
5/8 15.9 9 228.6
10 254.0
11 279.4
12 304.8
13 320.2
14 355.6
15 381
16 406.4
17 431.8
18 457.2
19 482.6
20 508
21 533.4
22 558.8
23 584.2
24 609.6


Table IV Miscellaneous Lengths[edit]

English Metric
1 mile 1.609 kilometers
1 yard(3 ft) 0.9144 meter
3.28 ft 1 meter
39.37 inches 1 meter
1 inch 2.54 centimeters