DELTA-SIERRA MARS TOOL
Mars habitat gas calculator
Use the ideal-gas equation without confusing total pressure and partial pressure.
Essential answer
At fixed volume and temperature, higher pressure means more gas. Oxygen partial pressure is the O₂ fraction multiplied by total pressure.
Every value is editable. Scenario values are not an official NASA architecture.
Calculator
Method and limitations
The model assumes ideal-gas behavior and a homogeneous mixture. Pressure and oxygen fraction are architecture choices; the calculator does not prescribe a human atmosphere.
Primary sources and evidence status
The calculation distinguishes physical relation, demonstrated value, standard, educational assumption, and Delta-Sierra scenario.
- NASA Glenn — Equation of State
Primary educational source for the ideal-gas relation P·V=n·R·T and the requirement to use absolute temperature. - NASA-STD-3001 Volume 2
Human-spaceflight standard context; pressure/composition choices remain architecture- and mission-dependent.
Sources and further reading
Downloadable scenario data
Dataset v1.1 documents every prefilled value: unit, system boundary, time basis, evidence status, and source when one exists.