The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric system of measurement. The SI is the dominant measurement system used in science and international commerce. In recognition of this fact, Congress has designated the metric system of measurement as the

SI UNITS AND CONVERSION TABLES Measurement Unit Symbol Equivalents Length 1 millimeter mm 1000 micrometers (µm) 1 centimeter cm 10 millimeters (mm) 1 meter m 100 centimeters (cm) 1 kilometer km 1000 meters (m) Area 1 square meter m2 10 000 square centimeters (cm2)

SI units of measurement CCTV Metric prefixes When the number of units (i.e., the value) for a particular measurement is very high or very small, there is a convention for using certain symbols before the basic unit and each has a specific meaning. The following are metric prefixes accepted by the international scientific and industrial ...

International d’Unités), is the modern metric system of measurement. Long the dominant measurement system used in science, the SI is becoming the dominant measurement system used in international commerce. The Omnibus Trade and Competitiveness Act of August 1988 [Public Law (PL) 100-418] changed

SI Units 343 International System of Units (SI Units) Analyte Gravimetric Conversion International Unit Factor Unit 17-Ketosteroids mg/24 h 3.47 μmol/d mg/g creat 0.392 μmol/mmol creat Leptin ng/mL 1.0 μg/L LH (Luteinizing Hormone) mIU/mL 1.0 IU/L Lipoprotein (a) mg/dL 0.01 g/L Macroprolactin ng/mL 1.0 μg/L Magnesium, S mg/dL 0.4114 mmol/L

For more, see References on Systems of Units of Measurements Web links BIPM. The home page of the SI System of Units. NIST Units of Measurements page. Tables of SI Units and Prefixes. URL of this document. Si dimensions of over 200 physical quantities. NIST Links to official on-line publications about the SI system. Unit Converters list.

APPENDIX 1.1 PHYSICAL QUANTITIES AND THEIR SI UNITS s y mbolSI easur nt units di nsions distance d meter m m mass m kilogram kg kg time t second s s electric charge* Q coulomb C C temperature T Kelvin K K amount of substance n mole mol mol luminous intensity I candela cd cd acceleration a meter per second squared m/s2 m/s2 area A square meter m2 m2

The SI, with standard scheme of symbols, units and abbreviations, was developed and recommended by General Confer ence on W eights and Measur es in 1971 for 2.1 Introduction 2.2 The international system of units 2.3 Measurement of length 2.4 Measurement of mass 2.5 Measurement of time 2.6 Accuracy, precision of instruments and errors in measurement