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NIST SP 365, Metric Conversion Card is a laminated wallet size card includes an 8 cm and 80 mm ruler with approximate unit conversion factors between common International System of Units (SI) and U.S. customary measurement units for length, area, mass, volume, and temperature (exact formula). This job aid is useful for making quick mathematical unit conversion calculations.
Benham, E.
and Dill, K.
(2024),
Metric Conversion Card, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.365-2024, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958415
(Accessed October 9, 2025)