Standard pressure altitude

{
  "id": "MLC-T-MET-010783",
  "term": "Standard pressure altitude",
  "field": "Meteorology and atmospheric science",
  "definition": "The altitude in the International Standard Atmosphere (ISA) corresponding to a given atmospheric pressure. It is calculated based on the assumption of a standard temperature lapse rate and sea-level pressure. This value is used in aviation to standardize aircraft performance calculations, with 29.92 inches of mercury (1013.25 hPa) representing standard sea-level pressure.",
  "url": "https://mlchart.com/terminology/meteorology/standard-pressure-altitude/"
}