Science converter tools

Chemistry and fluid-dynamics unit conversions with NIST-audited factors.

Amount of Substance Converter — Moles & Millimoles

Convert moles to millimoles, micromoles, kilomoles, and pound-moles instantly. Free amount-of-substance converter that runs in your browser.

Molar Mass Converter — g/mol & kg/mol

Convert molar mass between g/mol, kg/mol, kg/kmol, daltons, and lb/lb-mol instantly. Free molar mass unit converter that runs in your browser.

Dynamic Viscosity Converter — Pa·s, Poise & Centipoise

Convert dynamic viscosity between Pa·s, poise, centipoise, and lbf·s/ft² instantly with NIST factors. Free viscosity converter in your browser.

Kinematic Viscosity Converter — m²/s, Stokes & Centistokes

Convert kinematic viscosity between m²/s, stokes, centistokes, and ft²/s instantly with exact NIST factors. Free viscosity converter in your browser.

Mass Flow Rate Converter — kg/s, kg/h & lb/h

Convert mass flow between kg/s, kg/h, tonnes per hour, lb/s, and lb/h instantly with exact NIST factors. Free flow rate converter in your browser.

Flow Rate Converter — L/min, GPM & CFM

Convert volumetric flow between L/min, GPM, CFM, m³/h, and L/s instantly with exact NIST factors. Free flow rate converter in your browser.