How many bar is 1 atm?

1 atm is approximately 1.01325 bar.

Where is psi commonly used?

Tire pressure and US industrial standards.

What is standard atmospheric pressure in kPa?

1 atm = 101.325 kPa — the same as 1,013 hPa in weather reports (1 hPa = 100 Pa).

How many kPa is 120 mmHg?

About 16 kPa (120 × 133.32 = 15,998 Pa). Blood pressure monitors conventionally use mmHg.

🎚️ Pressure Converter

Convert atm, bar, psi, mmHg and more instantly.

How it works

Type a value in the left field.
Pick the units to convert from and to.
The result updates instantly, with a full reference table below.

Key units & conversion basis

Pressure units are converted through pascals (Pa). Each field has its own standard — weather services (hPa), tire pressure (psi, bar), and medicine (mmHg).

Unit	Symbol	In Pa	Common use
Pascal	Pa	1 Pa	SI base
Kilopascal	kPa	1,000 Pa	engineering, tires
Bar	bar	100,000 Pa	pneumatic systems
Atmosphere	atm	101,325 Pa	reference
PSI	psi	6,894.76 Pa	US tires, gauges
mmHg	mmHg	133.32 Pa	blood pressure, weather
inHg	inHg	3,386.39 Pa	US weather

🧮 How the conversion is calculated

Example: 35 psi tire pressure to kPa → 35 × 6,894.76 = 241,317 Pa → ÷ 1,000 = 241.3 kPa (≈2.4 bar).

🎯 When to use this

Convert tire pressure (psi) to bar
Convert atmospheric pressure in weather data
Check industrial equipment pressure specs (atm, kPa)
Match foreign tire-pressure specs (psi) to bar or kPa

📖 Guide: Converting Tire Pressure psi ↔ bar — Getting It Right →

Frequently Asked Questions

How many bar is 1 atm?: 1 atm is approximately 1.01325 bar.
Where is psi commonly used?: Tire pressure and US industrial standards.
What is standard atmospheric pressure in kPa?: 1 atm = 101.325 kPa — the same as 1,013 hPa in weather reports (1 hPa = 100 Pa).
How many kPa is 120 mmHg?: About 16 kPa (120 × 133.32 = 15,998 Pa). Blood pressure monitors conventionally use mmHg.