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preface to fifteenth edition

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GENERAL INFORMATION, CONVERSION TABLES, AND MATHEMATICS 2.35<br />

TABLE 2.7<br />

Conversion Fac<strong>to</strong>rs<br />

The data were compiled by L. P. Buseth for the 13th <strong>edition</strong>; some entries have been added or modified in view<br />

of recent data and SI units.<br />

Relations which are exact are indicated by an asterisk (*). Fac<strong>to</strong>rs in parentheses are also exact. Other fac<strong>to</strong>rs<br />

are within 5 in the last significant figure.<br />

Toconvert In<strong>to</strong> Multiply by<br />

Abampere ampere* 10<br />

Abcoulomb coulomb* 10<br />

statcoulomb 2.998 10 10<br />

Abfarad farad* 10 9<br />

Abhenry henry* 10 9<br />

Abmhosiemens* 10 9<br />

Abvolt volt 10 8<br />

Acre hectare or square hec<strong>to</strong>meter 0.404 685 64<br />

square chain (Gunter’s)* 10<br />

square kilometer* 0.004 046 873<br />

square meter* 4046.873<br />

square mile* (1/640)<br />

square rod* 160<br />

square yard* 4840<br />

Acre (U.S. survey) square meter 4046.873<br />

Acre-foot cubic foot* 4.3560 10 4<br />

cubic meter 1233.482<br />

gallon (U.S.) 3.259 10 5<br />

Acre-inch cubic foot* 3630<br />

cubic meter 102.7902<br />

Ampere per square centimeter ampere per square inch* 6.4516<br />

Ampere-hour coulomb* 3600<br />

faraday 0.037 31<br />

Ampere-turn gilbert 1.256 637<br />

Ampere-turn per centimeter ampere-turn per inch 2.540<br />

Ångström meter* 10 10<br />

nanometer* 0.1<br />

Apostilb candela per square meter 0.318 309 9; (1/)<br />

lambert*<br />

10 4<br />

Are acre 0.024 710 54<br />

square meter* 100<br />

Assay <strong>to</strong>n gram 29.1667<br />

Astronomical unit meter 1.496 00 10 11<br />

light-year<br />

1.581 284 10 5<br />

Atmosphere bar* 1.013 25.0<br />

foot of water (at 4C) 33.898 54<br />

inch of mercury (at 0C) 29.921 26<br />

kilogram per square centi- 1.033 227<br />

meter<br />

millimeter of mercury* 760<br />

millimeter of water (4C) 1.033 227 10 4<br />

new<strong>to</strong>n per square meter* 1.013 250 10 5<br />

pascal* 101 325.0<br />

pound per square inch 14.695 95<br />

<strong>to</strong>n per square inch 0.007 348<br />

<strong>to</strong>rr* 760<br />

A<strong>to</strong>mic mass unit gram 1.6605 10 24<br />

Avogadro number molecules per mole 6.022 137 10 23

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