SOP Exhibits

Title:

Annex D - Table of Ratio Factor

SOP Number : GS-CR08

ANNEX D

Tabulated below are the ratio factors of some sizes of commonly used records in an agency:

TABLE OF RATIO FACTOR

SIZE OF RECORD IN CM	EQUIVALENT SIZE IN INCH	RATIO FACTOR
7.62 x 12.70	3 x 5	0.10
8.26 x 18.73	3.25 x 7.375	0.015
10.16 x 15.24	4 x 8	0.015
12.70 x 20.32	5 x 8	0.026
17.78 x 20.32	7 x 8	0.033
20.32 x 26.67	8 x 10 ½	0.054
20.32 x 31.75	8 x 12½	0.064
20.32 x 33.02	8 x 13	0.067
21.59 x 27.94	8 ½ x 11	0.061
21.59 x 35.56	8 ½ x 14	0.077
22.86 x 30.48	9 x 12	0.069
26.67 x 40.64	10 ½ x 16	0.108
35.56 x 43.18	14 x 17	0.154

Example: A file drawer containing a regular letter size paper measured 45.75 centimeters from the front to the back of the file.
The size of a regular letter is 20.32 cm. by 26.67 cm (8” x 10½”) and its ratio
factor as shown in the above table is 0.054. The volume of said record series would be computed as follows:

Linear Meter = 45.75 cm. = 0.4575 m
Ratio Factor = 0.054
Volume = 0.4575 x 0.054 (multiply)
= 0.0247 cu.m.

The National Archives of the Philippines have simplified the measurement for the volume for cubic meter and explained as:

ONE (1) FILING CABINET DRAWER = 0.056 cu.m.

FOUR (4) DRAWER FILING CABINET = 0.224 cu.m.

VOLUME OF RECORDS STORED IN OPEN SHELVES = L X H X W