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Tables and Lookups
1 tool in the Units area.
Engineering Constants and Tables
A searchable reference of the tables an engineer reaches for, every row from a public-domain government source and cited on the row: the 452 conversion factors of NIST SP 811 Appendix B (exactness as NIST prints it), the CODATA 2022 physical constants as NIST publishes them, the SI prefixes, base units and the 22 derived units with special names (SP 330), the AWG copper wire table of NBS Handbook 100 (diameter, circular mils, resistance and mass per 1,000 ft at 20 °C), the unified UNC / UNF / UNEF basic thread dimensions of NBS Handbook H28 (pitch and minor diameters, lead angle, minor-diameter and tensile stress areas), the ISO metric coarse and fine series, NPS schedule 40 / 80 pipe dimensions, the constants and sea-level properties of the U.S. Standard Atmosphere 1976, density and moduli of common metals from the MIL-HDBK-5J rows of the site database and of woods from the Wood Handbook, the Greek alphabet, the gravitational constants of the US customary system and the properties of water and air at standard conditions. Three calculators work on the tables: a two-field unit converter that reads any product, quotient or power of SP 811 and SI symbols and refuses mismatched dimensions, a thread calculator giving the H28 basic dimensions, stress area, shear areas and lengths of engagement for any diameter and pitch (unified or ISO metric), and a wire calculator by the AWG law with the resistance at any temperature. A blank search shows the first rows of every table with the count; a search term filters every table; the shown table downloads as CSV. The default case converts 1 lbf·ft to N·m (1.355 818), works the ½-13 UNC thread (A_t = 0.1419 in², as Table 2.8 prints it) and 12 AWG (80.8 mils, 6,530 circular mils, 1.59 Ω per 1,000 ft).
1 worked example reproduced, listed on the tool page.