SS13 Atmos Calculator

Set gas percentages and total pressure to calculate partial pressures, check breathability, and get hazard warnings. Use presets for common scenarios.

Presets

Gas Mix Configuration

Total Pressure (kPa)

Standard breathable air: 101.3 kPa

Oxygen (O2)

21.3 kPa partial %

Nitrogen (N2)

80.0 kPa partial %

Carbon Dioxide (CO2)

0.0 kPa partial %

Plasma

0.0 kPa partial %

Nitrous Oxide (N2O)

0.0 kPa partial %

Freon

0.0 kPa partial %

Total: 100.0%

✅

Breathable

Atmosphere supports human life without a mask.

Oxygen (O2) 21.27 kPa

21.0%

Nitrogen (N2) 80.03 kPa

79.0%

Carbon Dioxide (CO2) 0.00 kPa

0.0%

Plasma 0.00 kPa

0.0%

Nitrous Oxide (N2O) 0.00 kPa

0.0%

Freon 0.00 kPa

0.0%

Atmospheric Reference

Gas	Standard %	Danger Threshold	Effect
Oxygen (O2)	21%	Below 16 kPa partial	Suffocation
Nitrogen (N2)	79%	None	Inert, safe filler
CO2	0%	Above 0.5%	Headache, dizziness
Plasma	0%	Any amount	Toxic, flammable with O2
N2O	0%	Above ~10%	Anesthetic, unconsciousness
Freon	0%	Any amount	Freezing, hypothermia

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