keisoku

Destination Temperature & Pressure Calculator

Enter your starting point's temperature, pressure, and elevation plus the destination elevation, and estimate the destination's approximate temperature and pressure from the elevation difference. Great for planning hikes, drives, and outdoor trips.

Input

Enter the temperature, pressure, and elevation at your starting point (the reference) plus the elevation of your destination, and we'll estimate the destination's approximate temperature and pressure from the elevation difference. Actual conditions vary with weather, latitude, and season, so use this as a rough guide for hiking and outdoor trips.

℃
hPa
m
m

Destination elevation examples (click to fill in)

Result

Estimated destination temperature

-4.5℃

Climbing 3,776 m, the temperature is expected to drop by about 24.5 °C.

Destination pressure (approx.)

640 hPa

Elevation difference (destination − reference)

+3,776.0 m

Temperature change

-24.5 ℃

Estimate breakdown

ItemValue
Elevation difference (destination − reference)+3,776.0 m
Temperature change (0.65 °C per 100 m)-24.5 ℃
Estimated destination temperature-4.5 ℃
Pressure change (destination − reference)-373.3 hPa
Estimated destination pressure640 hPa

Temperature uses the lapse rate, which drops about 0.65 °C per 100 m of elevation, while pressure is approximated with the standard-atmosphere altitude formula P = P0 ×(1 − 0.0065h /(T0 + 273.15))^5.257. Real values shift with weather, humidity, latitude, and season.

How it works

  • Temperature is found from the elevation difference using the lapse rate (environmental lapse rate), which drops about 0.65 °C for every 100 m of elevation gained.
  • Pressure is estimated with the standard-atmosphere altitude formula P = P0 ×(1 − 0.0065h /(T0 + 273.15))^5.257, where P0 is the reference pressure, T0 is the reference temperature (°C), and h is the elevation difference from the reference (m).
  • The elevation difference is calculated as 'destination elevation − reference elevation'; climbing (positive) lowers temperature and pressure, while descending (negative) raises them.
  • Actual temperature and pressure vary greatly with weather, humidity, latitude, season, and wind, so the values shown here are only rough estimates.
  • The lapse rate is an average representative value; the real drop differs on clear days or when a temperature inversion occurs. On mountains the temperature can fall below this calculation, so prepare gear with plenty of margin.
  • Use this as a helpful guide when planning hikes and outdoor activities, and check official weather information from your national meteorological service for accurate forecasts.