Force / area

Pressure Converter

Convert between pressure units instantly. Enter a value and see it expressed across all standard measurements.

Value

From

Result

14.5038PSI

Pascal100000

Kilopascal100

Bar1

PSI14.5038

Atmosphere0.986923

mmHg750.064

What is the Pressure Converter?

A pressure converter is a tool that translates pressure measurements between different units of measurement. Pressure is force applied per unit area, expressed in units like PSI (pounds per square inch), bar, Pascal (Pa), atmospheres (atm), and kiloPascals (kPa). Engineers, technicians, and DIY users rely on converters to work across measurement systems without calculation errors.

How it works

Enter a pressure value and select its unit, then choose your target unit. The converter multiplies or divides by the conversion factor between the two units—for example, 1 PSI equals approximately 0.0689476 bar, and 1 bar equals 100,000 Pascals. The result displays instantly to several decimal places, suitable for both rough estimates and precise technical work.

Input	Result	Notes
32 PSI	2.21 bar	Standard car tire pressure; roughly 2.2 bar on European gauges
1 atm (atmosphere)	101,325 Pa	Sea-level standard atmospheric pressure, the baseline reference
150 kPa	1.5 bar	Medical or HVAC pressure reading; straightforward kPa-to-bar conversion

Input

Result

Notes

32 PSI

2.21 bar

Standard car tire pressure; roughly 2.2 bar on European gauges

1 atm (atmosphere)

101,325 Pa

Sea-level standard atmospheric pressure, the baseline reference

150 kPa

1.5 bar

Medical or HVAC pressure reading; straightforward kPa-to-bar conversion

Benefits

Instantly convert between PSI, bar, Pascal, atm, and kPa without memorizing factors

Supports both metric and imperial pressure units for global compatibility

Precise to multiple decimal places for engineering and technical applications

No sign-up needed; works offline on any device

Eliminates manual calculation errors that can affect safety-critical systems

Tips & common mistakes

Common mistakes

Confusing PSI (absolute pressure) with gauge pressure; gauge pressure reads 0 at atmospheric, absolute includes it

Using an outdated or inaccurate conversion factor (e.g., rounding 1 PSI to 0.07 bar instead of 0.0689476)

Forgetting that tire pressures are usually gauge pressure, not absolute; add 14.7 PSI to gauge readings for absolute

Tips

Tire pressures are always shown as gauge pressure on car door stickers; add 14.7 PSI if you need absolute pressure

For plumbing and HVAC work, bar and kPa are standard in Europe and metric regions; PSI dominates North America

Keep a reference: 1 bar ≈ 100 kPa ≈ 14.5 PSI ≈ 0.987 atm for quick mental checks

High-altitude locations have lower atmospheric pressure, affecting gauge readings; always confirm whether a reading is gauge or absolute

Frequently asked questions

What is the difference between gauge pressure and absolute pressure?

Gauge pressure measures pressure relative to atmospheric pressure (reads 0 at sea level), while absolute pressure includes atmospheric pressure. Tire and water pressure readings are almost always gauge pressure. To convert gauge to absolute, add 14.7 PSI or 1 atm.

Why are there so many pressure units?

Different industries and regions adopted different standards. PSI is common in North America and automotive; bar and kPa are standard in Europe and industrial applications; Pascal is the SI scientific unit; atmospheres and mmHg (mercury) are older but still used in weather and medical work.

What pressure should my car tires be?

Check your vehicle's door jamb sticker or owner manual for the correct gauge pressure. Typical passenger cars run 30–35 PSI (2.1–2.4 bar); trucks and SUVs may run 35–45 PSI. Always use gauge pressure for tire specs.

What is a Pascal, and why is it so small?

A Pascal (Pa) is the SI unit of pressure: 1 Newton of force per square meter. It is tiny because a square meter is huge; typical gauges read in kPa (kiloPascals, thousands of Pascals). Atmospheric pressure is 101,325 Pa, which equals 101.325 kPa.

Can I convert pressure if I only have gauge pressure?

Yes, but you need to know whether the reading is gauge or absolute. If it is gauge pressure (as with tire gauges), and you need absolute, add 14.7 PSI (or 1 atm, or 101.325 kPa) before converting.

What is bar and how does it relate to PSI?

Bar is a non-SI metric unit of pressure, widely used in Europe and HVAC. 1 bar equals 100 kPa and approximately 14.5 PSI. It is roughly equal to sea-level atmospheric pressure, making it intuitive for practical work.