Click save settings to reload page with unique web page address for bookmarking and sharing the current tool settings
Change the answer mode for this tool by selecting P1 gas pressure, V1 gas volume, T1 gas temperature, P2 gas pressure, V2 gas volume or T2 gas temperature as the parameter to calculate instead
Featured absolute pressure measurement products
760mmHg absolute range digital vacuum gauge - Digital vacuum gauge for measuring over the 0 to 760mmHg (millimetres of Mercury) absolute pressure range. 
DMP457 Marine Approved Pressure Transmitter - Marine approved stainless steel diaphragm pressure transmitter with 4-20mA current loop output for shipbuilding in ranges from 100mb to 600 bar gauge or absolute.
Related Tools
- Ideal gas law calculator
- Boyle’s law calculator
- Charles’ law calculator
- Avogadro’s law calculator
- Gay-Lussac’s law calculator
- Pressure units conversion
- Volume units conversion
- Temperature units conversion
User Guide
This tool will calculate any parameter from the equation for the combined gas law P₁V₁/T₁=P₂V₂/T₂ which is derived by combining Boyle’s, Charles’ and Gay-Lussac’s law, and includes P1 gas pressure, V1 gas volume, T1 gas temperature, P2 gas pressure, V2 gas volume and T2 gas temperature.
The combined gas law explains that for an ideal gas, the absolute pressure multiplied by the volume of the gas is directly proportional to the gas temperature, if the amount of gas remains constant.
Formulas
The combined gas law is explained with math in the following ways.
The pressure multiplied by the volume of an ideal gas is proportional to its temperature:
P · V ∝ T
The pressure multiplied with the volume, and divided by the temperature of an ideal gas in a given state, equals a constant value:
P · V / T = Constant
The multiplying together of the pressure and volume, and dividing by the temperature of an ideal gas in one state, equals the multiplying of the pressure and volume, and dividing by the temperature an ideal gas in another state, as long as the quantity of gas does not change between the two states.
P1 · V1 / T1 = P2 · V2 / T2
The formulas used by this combine gas law calculator to determine each individual parameter are:
P1 = P2 · V2 · T1 / (V1 · T2)
V1 = P2 · V2 · T1 / (P1 · T2)
T1 = P1 · V1 · T2 / (P2 · V2)
P2 = P1 · V1 · T2 / (V2 · T1)
V2 = P1 · V1 · T2 / (P2 · T1)
T2 = P2 · V2 · T1 / (P1 · V1)
Symbols
- P1 = Pressure of the first gas state
- V1 = Volume of the first gas state
- T1 = Temperature of the first gas state
- P2 = Pressure of the second gas state
- V2 = Volume of the second gas state
- T2 = Temperature of the second gas state
P1
This is the absolute pressure of the first gas state.
V1
This is the total volume occupied by the first gas state.
T1
This is the temperature of the first gas state.
P2
This is the absolute pressure of the second gas state.
V2
This is the total volume occupied by the second gas state.
T2
This is the temperature of the second gas state.
Featured temperature measurement products
Wireless environmental sensors with custom MQTT SCADA system for energy management IoT platform - An energy management specialist required a multi-point wireless sensor network with specific accuracy requirements and a gateway that could output to their own MQTT-based SCADA system. This explains the selection of sensors and the dual gateway solution offered, covering both Modbus RTU and cellular MQTT options.
Rotating planetary ball mill containers wireless temperature monitoring - Wireless transmitter and USB receiver for monitoring a planetary ball mill for days. Measure and log surface temperature on rotating equipment.