Drafting/Conversion Table of English Linear Measurements into Metric

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 MeterEdit

Inch/InchesMeterInchesMeter
1/320.0008130.3202
1/160.0016140.3556
1/80.0032150.381
3/160.0047160.4064
1/40.0063170.4318
5/160.0079180.4572
3/80.0095190.4826
7/160.0112200.508
1/20.0127210.5334
9/160.0142220.5588
5/80.0158230.5842
11/160.017424(2'-0")0.6096
3/40.019250.635
13/160.0205260.6604
7/80.022270.6858
15/160.0237280.7112
10.0254290.7366
20.0508300.762
30.0762310.7874
40.1016320.8128
50.127330.8382
60.1524340.8636
70.1778350.889
80.203236(3'-0")09144
90.2286370.9398
100.254380.9652
110.2794390.9906
12(1'-0")0.3048401.016


Table II Feet To MetersEdit

FeetMetersFeetMeters
10.3048144.2672
20.6096154.5720
30.9144164.8768
41.2192175.1816
51.5240185.4864
61.8288195.7912
72.1336206.0960
82.4384216.40
92.7432226.71
103.0480237.01
113.3528247.32
133.9624


Table III Inches To MillimetersEdit

Inch/InchesMillimetersInch/InchesMillimeters
1/320.821/3216.7
1/161.611/1617.5
3/322.423/3218.3
1/83.23/419.1
5/324.025/3219.9
3/164.813/1620.7
7/325.627/3221.5
1/46.47/822.3
9/327.129/3223.1
5/167.915/1623.9
11/328.731/3224.7
3/89.5125.4
13/3210.3250.8
7/1611.1376.2
15/3211.94101.6
1/212.75127.0
17/3213.56152.4
9/1614.37177.8
19/3215.18203.2
5/815.99228.6
10254.0
11279.4
12304.8
13320.2
14355.6
15381
16406.4
17431.8
18457.2
19482.6
20508
21533.4
22558.8
23584.2
24609.6


Table IV Miscellaneous LengthsEdit

EnglishMetric
1 mile1.609 kilometers
1 yard(3 ft)0.9144 meter
3.28 ft1 meter
39.37 inches1 meter
1 inch2.54 centimeters