- Altitude Pressure
This calculator uses barometric formula to find out the pressure at the given altitude

- Barometric leveling
- Boiling point dependence on the altitude above sea level
This online calculator finds the water boiling temperature given the atmospheric pressure in millimeters of mercury.

- Clapeyron-Mendeleev equation. The relationship between the number of moles of gas, the temperature, volume and pressure.
Clapeyron-Mendeleev equation. The relationship between the number of moles of gas, the temperature, volume and pressure.

- Density of oil
Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard

Calculator which converts units of pressure

- Pressure over a surface
This online calculator computes pressure, cause by given mass over given surface in gravity field. Result is displayed using different units of pressure

- Relative humidity to absolute humidity and vise versa calculators
First calculator converts relative humidity to absolute humidity for given temperature and barometric pressure. Second calculator converts absolute humidity to relative humidity for given temperature and barometric pressure

- Saturation vapour pressure
This online calculator computes saturation vapour pressure for given temperature and atmospheric (barometric) pressure

- The buoyant force
This calculator computes the buoyant force and weight of the liquid displaced, given the volume of body in water

- Volume of body given the buoyant force
This calculator computes the volume of body given the buoyant force and density of the body, assuming that the buoyant force equals gravity force.