![]() ![]() customary units, including notes on British measurement units. NIST HB 44 – Appendix C (Current Ed.) provides several convenient conversion factor tables for length, area, volume (dry and liquid measure), and mass using SI (metric system) and U.S.NIST SP 1038 (Current Ed.) lists the units of the International System of Units (SI), or metric system, recommended for use in trade and commerce and other general uses by the National Institute of Standards and Technology.NIST SP 811 – Appendix B (Current Ed.) provides guidance on the use of conversion factors which are expressed using scientific notation (listed both alphabetically and by topic areas) and rules for rounding numbers and converted numerical values of quantities.Common conversion factors are also listed (Section 5). This multi-step process is presented in NIST SP 1038 - 2006 (Section 4.4), including a rounding procedure for technical documents, specifications, and other applications such packaged goods in the commercial marketplace and temperature. Unit conversion is a multi-step process that involves multiplication or division by a numerical factor, selection of the correct number of significant digits, and rounding. Staff and Technical Experts Directory Expand or Collapse.The National Conference on Weights and Measures (NCWM).NIST / OWM Security and Privacy Policies.How to Request Training & Transcript Using the Contacts System (PDF).How to Request Publications using OWM Contacts System (PDF). ![]()
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