Calculating Barometric Pressure Using Temperature And Elevation

This calculator determines barometric pressure based on temperature and elevation. Barometric pressure decreases with increasing altitude and is affected by temperature changes.

Input Parameters

Calculation Results

Calculation Results

Barometric Pressure: -- Pa

Barometric Pressure: -- inHg

Barometric Pressure: -- atm

Calculation Formula

P = P₀ × exp(-g × M × h / (R × T))

Where:
P = Barometric pressure at given elevation
P₀ = Sea level standard pressure (101325 Pa)
g = Gravitational acceleration (9.80665 m/s²)
M = Molar mass of dry air (0.0289644 kg/mol)
h = Elevation above sea level (meters)
R = Universal gas constant (8.31432 J/(mol·K))
T = Absolute temperature (K) = (°C + 273.15)

Calculating Barometric Pressure Using Temperature And Elevation Calculator Usage Guide

Learn how to use the calculator to determine barometric pressure based on temperature and elevation.

How to Use This Calculator

  1. Enter the temperature in degrees Celsius (°C). Temperature affects the air density and therefore the barometric pressure.
  2. Enter the elevation in meters (m). Barometric pressure decreases with increasing elevation because the weight of the air column above decreases.
  3. Click the "Calculate" button to compute the barometric pressure.
  4. The calculator will display the pressure in Pascals (Pa), inches of mercury (inHg), and atmospheres (atm).

Understanding the Results

Barometric pressure is a critical parameter in meteorology and aviation. It decreases approximately 1 inch of mercury (inHg) for every 1,000 feet of altitude gain. The temperature also affects this relationship - colder air is denser and exerts higher pressure than warmer air at the same elevation.

Practical Applications

  • Aviation: Pilots use barometric pressure to determine altitude, especially in non-pressurized aircraft.
  • Weather forecasting: Barometric pressure changes often indicate approaching weather systems.
  • Hiking and outdoor activities: Helps predict weather changes during elevation changes.
  • Scientific research: Used in various environmental and atmospheric studies.

Important Notes

This calculator uses the International Standard Atmosphere (ISA) model for calculations. For locations with significant humidity or other atmospheric conditions, actual measurements may vary.