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9 results in references.
Clear searchReference · Fluid properties · External source
Look up density, viscosity, heat capacity and other properties at specified temperature and pressure. Select the fluid, units and state at NIST.
Reference · Units · External source
Reference for unit notation and conversion factors. SP 811 predates the 2019 SI redefinition; use its linked SP 330 for updated base-unit definitions.
Reference · Fluid mechanics · External source
Derivation relating static and dynamic pressure, with the steady, inviscid and incompressible assumptions for the simplified relation.
Reference · Chemistry · External source
Find thermochemical, thermophysical and spectral data by chemical name, formula or CAS number. Consult the original record for phase, temperature range and cited measurements.
Reference · Materials · External source
Search materials research datasets from NIST and community contributors. Review status and reuse terms vary by record; this repository is not a collection of universally certified design values.
Reference · Mathematics · External source
Reference for numerical methods and special functions, including Bessel functions, error functions and elliptic integrals. Check the domain and conventions of each formula.
Reference · Statistics and quality · External source
Methods for exploratory data analysis, measurement characterization, process modeling, quality control and reliability. Use the online chapters for updates beyond the older printable PDFs.
Reference · Energy and weather · External source
Access worldwide solar and meteorological datasets derived from satellite observations and models, through a viewer or API. Inspect methodology, parameter definitions and uncertainty for the intended location and application.
Reference · Water resources · External source
Find monitoring locations and current or historical water observations. Check location metadata, measurement category and the observation period before comparing streamflow, groundwater or water-quality records.