Appendix C. Metric conversion and similar comparisons
Use this section to convert values between the metric and the US standards. To convert other values that
are not shown in the tables:
• From millimeters to inches, multiply millimeters by 0.03937 (Table 168 on page 282)
• From millimeters to feet, multiply millimeters by 0.00328
• From centimeters to inches, multiply centimeters by 0.3937
• From centimeters to feet, multiply centimeters by 0.0328
• From meters to inches, multiply meters by 39.37
• From meters to feet, multiply meters by 3.2808 (Table 169 on page 283)
• From inches to millimeters, multiply inches by 25.4 (See note atop Table 170 on page 283)
• From inches to centimeters, multiply inches by 2.54 (Table 170 on page 283)
• From inches to meters, multiply inches by 0.0254 (See note atop Table 170 on page 283)
• From feet to millimeters, multiply feet by 304.801
• From feet to centimeters, multiply feet by 30.48 (Table 170 on page 283)
• From feet to meters, multiply feet by 0.3048 (Table 171 on page 283)
• From millimeters to centimeters, multiply millimeters by 0.10
• From centimeters to millimeters, multiply centimeters by 10.0
• From grams to ounces, multiply grams by .035274
• From grams to pounds, multiply grams by .0022046
• From ounces to grams, multiply ounces by 28.349527
• From kilograms to pounds, multiply kilograms by 2.2046 (Table 172 on page 284)
• From pounds to kilograms, multiply pounds by 0.45359 (Table 173 on page 284)
• From Centigrade to Fahrenheit, multiply degrees by 1.8, and add 32 (Table 174 on page 285)
• From Fahrenheit to Centigrade, subtract 32 from degrees, and multiply by 0.555 (Table 175 on page
285)
• For kilobytes to kibibytes, kibibytes to kilobytes, and for other like binary terms (mega, giga), see Table
178 on page 287
Table 168: Millimeters-to-inches conversion
MM IN. MM IN. MM IN. MM IN. MM IN.
1 0.039 11 0.433 21 0.827 31 1.220 41 1.614
2 0.078 12 0.472 22 0.866 32 1.259 42 1.653
3 0.118 13 0.512 23 0.905 33 1.299 43 1.693
4 0.157 14 0.551 24 0.945 34 1.338 44 1.732
5 0.196 15 0.590 25 0.984 35 1.378 45 1.771
6 0.236 16 0.629 26 1.024 36 1.417 46 1.811
7 0.275 17 0.669 27 1.063 37 1.456 47 1.850
8 0.315 18 0.708 28 1.102 38 1.496 48 1.889
9 0.354 19 0.748 29 1.142 39 1.535 49 1.929
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