Science · Physics
Constants & Unit Converter
The reference desk for a physicist-turned-engineer: CODATA fundamental constants on the left, a precise unit converter on the right. Click any value to copy it.
Unit converter
Physical constants · CODATA
Constant values follow the 2018 CODATA recommended set; SI base units have been exact by definition since the 2019 redefinition. Click a constant or converted value to copy it to your clipboard.