Skip to main content

Altitude Pressure Converter

Unit Converters

ISA standard atmosphere, boiling point, oxygen

Quick Answer

Altitude Pressure Converter: ISA standard atmosphere, boiling point, oxygen. Altitude Pressure Converter uses standard unit conversion formulas to compute accurate results instantly.

Standard atmospheric pressure70.11kPa
Corresponding altitude3,000m
Pressure (mmHg)526
Effective oxygen vs sea level69.2%
Water boils at90.0°C
Altitude assessment: Moderate altitude

Calculation steps

  1. 1ISA factor = 1 − 2.25577×10⁻⁵ × 3000 = 0.93233
  2. 2P = 101325 × 0.93233^5.25588 = 70,109 Pa ≈ 70.11 kPa
  3. 3Effective oxygen = P ÷ 101325 = 69.2% of sea level
  4. 4Boiling point (Antoine) at 526 mmHg ≈ 90.0 °C

Altitude reference chart

Altitude (m)Pressure (kPa)Boiling pointOxygen vs sea level
0101.33100.0 °C100.0%
50095.4698.3 °C94.2%
100089.8796.7 °C88.7%
200079.5093.4 °C78.5%
300070.1190.0 °C69.2%
400061.6486.7 °C60.8%
500054.0283.3 °C53.3%
600047.1880.0 °C46.6%
884931.4470.3 °C31.0%
ISA barometric formula: P = 101325 × (1 − 2.256×10⁻⁵·h)^5.256. Pressure halves roughly every 5,500 m. At Everest Base Camp (5,364 m) water boils at ~82°C — rice needs a pressure cooker; at the summit, available oxygen is only 33% of sea level.

Was this tool helpful?

How to Use

  1. Pick units: switch source and target units in the Altitude Pressure Converter.
  2. Enter a value: results sync both ways instantly — no convert button needed.
  3. Use the reference table: common conversions are listed for instant lookup.
  4. Copy the result: copy the converted value with its unit.

Key Points

  • Altitude Pressure Converter is a free online unit conversion tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: ISA standard atmosphere, boiling point, oxygen.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Altitude Pressure Converter formula

Altitude Pressure Converter uses standard unit conversion formulas to compute accurate results instantly.

FAQ

How do I use the Altitude Pressure Converter?
Open the page and fill in the input fields — results update automatically. ISA standard atmosphere, boiling point, oxygen.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

Related Tools

Related Guides

Source & Updates

Based on SI conversion factors and international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Altitude Pressure Converter[EB/OL]. https://www.yijiansuan.com/en/c/convert/altitude-pressure

Results provided by this tool are for reference only and do not constitute professional advice.