圧力換算
無料の圧力換算ツール — Pa、kPa、bar、psi、atm、mmHg、torr、inHgに対応。物理学、気象、タイヤ、工学向け。ブラウザですぐに換算できます。
Runs in your browserUpdated Apr 26, 2026
Pressure converter
All pressure conversions
Pascal
100000 Pa
Kilopascal
100 kPa
Megapascal
0.1 MPa
PSI
14.50377439 psi
Atmosphere
0.9869232667 atm
mmHg
750.0637554 mmHg
Torr
750.0637554 Torr
よくある質問
›Standard tire pressure in psi vs bar?
Most cars run at 30-35 psi, which is about 2.1-2.4 bar or 210-240 kPa. Always check your car's door sticker.
›What's 1 atmosphere?
1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi = 760 mmHg. It's the average sea-level air pressure.
›Why is blood pressure in mmHg?
Because the original sphygmomanometer used a column of mercury — height in mm directly indicated pressure. The unit stuck even though modern devices are digital.
›psi or kPa on tire sidewalls?
US-market tires usually show psi; rest-of-world tires show kPa or bar (sometimes both). 1 bar ≈ 14.5 psi.
›Is the converter free?
Yes — free, no signup, runs in your browser.