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Relationship Between Inches, Picas, Points, Pitch, and Twips

SUMMARY
There are several methods typographers can use to measure characterspacing (kerning) and line spacing (leading). Listed below are thedefinitions, and typical conversions you might need to employ.

POINT

"Point" is a unit of measurement used in typography that is equal to1/72 inch. It is used primarily for representing the height ofcharacters and the amount of space between lines, also known asleading.

Pitch Transferred to Points

120 / Pitch = Points
For example: 12 Pitch = 120 / 12 = 10 Points

PICA

"Pica" refers to a unit of measurement equal to 1/6 of an inch or 12points. Pica and points can be used interchangeably and manytypographers use pica as their standard unit of measurement.

Points Transferred to Pica

Points / 12 = Pica
For example: 24 Points = 24 Points / 12 = 2 Pica

PITCH

"Pitch" describes the width of a character. Pitch equals the number ofcharacters that can fit side-by-side in 1 inch; for example, 10pitch equals 10 characters-per-inch or 10 CPI. Pitch is a termgenerally used with non-proportional (fixed-width) fonts.

Point Transferred to Pitch

120 / Points = Pitch
For example: 10 point = 120 / 10 = 12 Pitch

TWIP

"Twip" is a unit of measurement equal to 1/20th of a printers point. Thereare 1440 twips to and inch, 567 twips to a centimeter

Points Transferred to Twips

20 * Points = Twips
For example: 10 Points = 20 * 10 Points = 200 Twips
` Inches     Picas     Points     Pitch     Twips            (1/6")    (1/72")    (CPI)     (1/1440") --------------------------------------------------- .08         .5        6         20.0      120 .10         .6        7         17.1      140 .11         .7        8         15.0      160 .13         .8        9         13.3      180 .14         .8       10         12.0      200 .15         .9       11         10.9      220 .17        1.0       12         10.0      240 .18        1.1       13          9.2      260 .19        1.2       14          8.6      280 .21        1.3       15          8.0      300 .22        1.3       16          7.5      320 .24        1.4       17          7.1      340 .25        1.5       18          6.7      360 .26        1.6       19          6.3      380 .28        1.7       20          6.0      400 .29        1.8       21          5.7      420 .31        1.8       22          5.5      440 .32        1.9       23          5.2      460 .33        2.0       24          5.0      480 .35        2.1       25          4.8      500 .36        2.2       26          4.6      520 .38        2.3       27          4.4      540 .39        2.3       28          4.3      560 .40        2.4       29          4.1      580 .42        2.5       30          4.0      600 .43        2.6       31          3.9      620 .44        2.7       32          3.8      640 .46        2.8       33          3.6      660 .47        2.8       34          3.5      680 .49        2.9       35          3.4      700 .50        3.0       36          3.3      720				`