標準大気圧
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/atmosphere-pressure-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/atmosphere-pressure-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/atmosphere-pressure-def/)Use the native HTML custom element.
定義
正確に101,325パスカル（101.325 kPa）と定義された圧力の基準単位で、海面における平均大気圧に近似する。
解説
Standard atmosphere (atm) is used to define other pressure units: 1 atm = 760 mmHg = 14.696 psi = 1.01325 bar. A typical car tire is inflated to 2.2–2.5 atm gauge pressure (above atmospheric). Deep-sea submersibles must withstand more than 1,000 atm at 10 km depth. The standard atmosphere is also the upper boundary of ‘Standard Conditions’ in gas law calculations.
RELATED ARTICLES
A complete guide to the four temperature scales in scientific and everyday use—Celsius, Fahrenheit, Kelvin, and Rankine—including their history, conversion formulas, and where they intersect.
Speed Units Guide: MPH, KM/H, Knots, and MachA complete reference for speed units used around the world — from everyday driving speeds to the velocity of light.
Energy Units Guide: Joules, Calories, BTU, and Kilowatt-HoursA complete reference for energy units across physics, food science, electrical engineering, and fuel — with key conversions and real-world examples.