[[Humidity unit conversions]] ## Absolute humidity >[!Definition] >The concentration of water vapor in moist air >Units: $\frac{[mass]}{[volume]}$ Absolute humidity = $\frac{m_w}{V_{net}}$ where $m_w$ = mass of water (lb, kg, g) and $V_{net}$ = volume of moist air (m3, ft3, L)