Calculator · Thermal Engineering
Ideal Gas Law Calculator
The ideal gas law ties the absolute pressure, volume, mass and absolute temperature of a gas through its specific gas constant R. Supply four of the five and the fifth follows.
Inputs
Dry air: 287 J/(kg·K).
Pressure is absolute (from vacuum) and temperature is absolute (kelvin). No atmospheric pressure is added and no Celsius value is converted behind the scenes.
Results
Pressure p = mRT/V
107.625 kPa
| Absolute pressure p | 107.625 kPa |
|---|---|
| Volume V | 0.8 m³ |
| Mass m | 1 kg |
| Absolute temperature T | 300 K |
| Gas constant R | 287 J/(kg·K) |
| Specific volume v = V/m | 0.8 m³/kg |
| Density ρ = m/V | 1.25 kg/m³ |
Assumptions
- · ideal gas
- · absolute pressure and temperature
Explore in the Lab
Start a process from this state in the Thermodynamic Process Lab
This state becomes State 1; γ and the process stay at the Lab defaults.
Technical reference
p V = m R T
p v = R T, v = V/m
ρ = 1/v = p/(R T)
- p
- absolute pressure[Pa]
- V
- volume of the gas[m³]
- m
- mass of the gas[kg]
- T
- absolute temperature[K]
- R
- specific gas constant[J/(kg·K)]
Valid for gases far from condensation and at moderate pressure, where intermolecular forces are negligible.
R is the specific gas constant of the gas, not the universal constant 8.314 J/(mol·K).