Pressure Converter - PSI, Bar, Pascal, Atm, Torr & mmHg
Fluid & Thermodynamic Cockpit

Pressure Converter - PSI, Bar, Pascal, Atm, Torr & mmHg

Convert pressure units between PSI, Bar, Pascals (Pa, kPa, MPa), Standard Atmospheres (atm), Torr, and Millimeters of Mercury (mmHg) with visual gauge representation.

Presets:
Pressure Source Calibration
1 Pa = 1 N/m²
Direct two-way binding
psi
Calibration Mode

Gauge Pressure (psig): Calibrated relative to ambient atmospheric air. Absolute pressure will add +14.696 psi / 1.01325 bar.

Decimal Precision
Rapid Setpoints:
Interactive Bourdon Tube Gauge
01020304050PSI GAUGEBAR (0 - 3.4)32 psi≈ 2.206 bar
0 psigScale: 0–50 PSI50 PSI
PSI (psig)
32
Abs: 46.7 psia
Bar (barg)
2.206
≈ 2,206 mbar
Kilopascal (kPa)
220.632
0.2206 MPa
Atmosphere (atm)
2.177
≈ 1,654.9 Torr
bar
Target Result (Bar)
2.206 bar
UnitSymbolCalculated (GAUGE)Absolute (psia/bara)Ratio (to 1 atm)Action
Pound-force per Square InchImperial / US
Standard imperial/US mechanical engineering & automotive tire pressure unit		psi3246.6963.177×
BarMetric SI
100,000 Pa metric engineering & European automotive standard pressure		bar2.2063.223.177×
KilopascalMetric SI
1,000 Pa - Standard metric automotive inflation & meteorology unit		kPa220.632321.9573.177×
MegapascalMetric SI
1,000,000 Pa (1 N/mm²) - Materials science, hydraulics & tensile pressure		MPa0.2210.3223.177×
Pascal (SI Base Unit)Metric SI
SI derived pressure unit: 1 Newton applied over 1 square meter (1 N/m²)		Pa220,632.233321,957.2333.177×
Millibar (Hectopascal)Atmospheric
Standard meteorological barometric pressure unit (1 mbar = 1 hPa = 100 Pa)		mbar / hPa2,206.3223,219.5723.177×
Standard AtmosphereAtmospheric
Mean sea level atmospheric pressure defined internationally as 101,325 Pa		atm2.1773.1773.177×
TorrManometric
Exact 1/760 of standard atmosphere, named after Evangelista Torricelli		Torr1,654.8782,414.8783.177×
Millimeter of MercuryManometric
Standard medical blood pressure and vacuum technology manometric column unit		mmHg1,654.8782,414.8783.177×
Inch of MercuryManometric
US aviation altimeter setting and automotive vacuum gauge standard (29.92 inHg)		inHg65.15395.0743.177×
Kilogram-force per cm² (at)Metric SI
Technical atmosphere (at) commonly seen on legacy Japanese and Asian pressure gauges		kgf/cm²2.253.2833.177×
Centimeter of Water (4°C)Manometric
Respiratory therapy, ventilator CPAP pressure, and fluid tank head measurement		cmH₂O2,249.8233,283.053.177×
Inch of Water (60°F)Manometric
HVAC building static pressure, draft ductwork, and gas appliance line pressure		inH₂O885.7571,292.5393.177×
Standard Atmosphere (1 atm)
220,632.2 Pa
Hydraulic Bar Equivalent
3.177 × P_atm
Imperial PSI Measurement
Gauge (relative to 1 atm)

Zero-Knowledge Local Execution

All mathematical computations execute strictly inside your local browser memory. Zero external server uploads.

Sub-Millisecond AST Engine

Instant real-time reactive computation delivers immediate feedback on every keystroke with zero network latency.

Production Standards & Compliance

Strict adherence to official specifications, ensuring enterprise accuracy and zero data leaks.

ToolsAA•100% Client-Side Private Web Utilities
Technical Reference & Architecture Guide

Pressure Converter - PSI, Bar, Pascal, Atm, Torr & mmHg — Reference Guide

Instant high-precision pressure unit conversions across PSI, Bar, Pascals (Pa/kPa/MPa), Atmospheres (atm), Torr, mmHg, and inHg.

Pressure Converter - PSI, Bar, Pascal, Atm, Torr & mmHg — Reference Guide — Client-Side In-Memory Architecture & Data Flow
Pressure Converter - PSI, Bar, Pascal, Atm, Torr & mmHg — Reference Guide — Client-Side In-Memory Architecture & Data Flow

Key Parameters & Controls

Pounds per Square Inch (PSI)number (psi)

Imperial pressure unit representing one pound-force applied to one square inch.

Default: 32.0
Barnumber (bar)

Metric pressure unit equal to exactly 100,000 Pascals (100 kPa).

Default: 2.206
Kilopascals (kPa)number (kPa)

SI metric standard engineering pressure unit.

Default: 220.63
Standard Atmosphere (atm)number (atm)

Mean atmospheric pressure at sea level.

Default: 2.177

Pro Tips & Best Practices

Check Tires When Cold

Tire friction warms air inside tires during driving, elevating pressure by 3 to 5 PSI (0.2 to 0.3 Bar). Always inflate to vehicle placard recommendations when tires have rested for at least 3 hours.

Understand Gauge (psig) vs Absolute (psia)

Tire pressure gauges read 0 when disconnected because they measure gauge pressure (pressure above atmospheric). Absolute pressure at sea level is Gauge + 14.7 psi.

Rule of Thumb: 1 Bar ≈ 14.5 PSI

For quick mental estimation in the garage: multiply Bar by 14.5 to get PSI (e.g. 2.0 Bar ≈ 29 PSI, 2.4 Bar ≈ 35 PSI).

Common Gotchas & Troubleshooting

⚠️Over-inflated Tire Handling Warning

Exceeding manufacturer placard tire pressure reduces road contact patch area, resulting in harsh ride quality, center-tread tire wear, and lengthened emergency stopping distances.

⚠️Barometer Unit Selection (inHg vs mmHg vs hPa)

US weather reports use inches of Mercury (inHg, e.g. 29.92 inHg), aviation uses hectopascals (hPa, 1013 hPa), and European/Asian forecasts use mmHg or millibars.

Frequently Asked Questions

How do you convert PSI to Bar?▼

Divide the PSI value by 14.5038, or multiply by 0.0689476: Bar = PSI × 0.0689476.

How do you convert Bar to PSI?▼

Multiply the Bar value by 14.5038: PSI = Bar × 14.5038.

What is the difference between Torr and mmHg?▼

For all practical engineering applications they are identical. 1 Torr is defined as exactly 1/760 of a standard atmosphere (101,325 / 760 Pa ≈ 133.322 Pa), historically based on the height of a mercury column.

Why does water pressure increase so quickly underwater?▼

Water is roughly 800 times denser than air. Every 10 meters (33 feet) of water depth adds approximately 1 full atmosphere (1 bar or 14.7 psi) of hydrostatic pressure.

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