What does the Air Pressure at Altitude Calculator do?

It estimates the atmospheric pressure at a given altitude using the troposphere barometric formula. You input altitude, sea-level pressure, sea-level temperature, and lapse rate to get the pressure at that altitude.

What units should I use for the inputs?

Altitude should be in meters (m), sea-level pressure in Pascals (Pa), sea-level temperature in Kelvin (K), and lapse rate in Kelvin per meter (K/m). Ensure all inputs are in these units for accurate results.

Is this calculator suitable for altitudes above the troposphere?

No, this calculator uses the troposphere barometric formula, which is valid only for the troposphere (up to about 11 km). For higher altitudes, other models are needed.

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Air Pressure at Altitude Calculator.

Estimate pressure with the troposphere barometric formula.

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02 / 答案

Altitude

Sea-level pressure

Sea-level temperature

Lapse rate

pressure

89,874.455159

temperature

281.65

Use Cases

Aviation and Flight Planning

Pilots and aviation enthusiasts can estimate air pressure at cruising altitudes to understand atmospheric conditions, which affect aircraft performance and altimeter settings.

Example: Estimate pressure at 10,000 m with standard sea-level conditions.

Weather and Atmospheric Studies

Meteorologists and students can use this tool to model pressure variations with altitude, aiding in understanding weather patterns and atmospheric structure.

Example: Calculate pressure at 5,000 m for a mountain weather forecast.

Frequently Asked Questions

What does the Air Pressure at Altitude Calculator do?: It estimates the atmospheric pressure at a given altitude using the troposphere barometric formula. You input altitude, sea-level pressure, sea-level temperature, and lapse rate to get the pressure at that altitude.
What units should I use for the inputs?: Altitude should be in meters (m), sea-level pressure in Pascals (Pa), sea-level temperature in Kelvin (K), and lapse rate in Kelvin per meter (K/m). Ensure all inputs are in these units for accurate results.
Is this calculator suitable for altitudes above the troposphere?: No, this calculator uses the troposphere barometric formula, which is valid only for the troposphere (up to about 11 km). For higher altitudes, other models are needed.

Tips & Common Mistakes

Tips

Use standard sea-level pressure (101325 Pa) and temperature (288.15 K) for typical conditions.
The standard lapse rate is about 0.0065 K/m; adjust it for custom atmospheric profiles.
Ensure altitude is entered as a positive number for above sea level; negative values can be used for below sea level (e.g., valleys).
Double-check that temperature is in Kelvin, not Celsius, to avoid errors.

Common Mistakes to Avoid

Using Celsius instead of Kelvin for temperature, leading to incorrect results.
Entering pressure in hPa or atm instead of Pa; convert to Pa first (1 atm = 101325 Pa).
Assuming the formula works for very high altitudes beyond the troposphere.

Last updated: August 13, 2026