Quick engineering unit conversion across 19 mechanical, thermal, and fluid property categories — SI and US customary units. Enter a value, select the source unit, and all equivalents update instantly. Click any result row to reanchor the conversion from that unit.
Conversion factors are based on standard reference conditions (ISO 80000, NIST). For design work, always verify the applicable standard and confirm the reference convention required by your specification — particularly for pressure (absolute vs. gauge), temperature (datum), energy (LHV vs. HHV), and viscosity (dynamic vs. kinematic).