🌡️ Pressure Conversion
Translate pressure readings between metric, imperial, and scientific units.
Select the starting and target units to convert any pressure value. Additional units are displayed automatically so you can update datasheets or troubleshooting logs without manual math.
Enter any numeric value. Negative pressure (vacuum) is allowed.
101325 Pascals (Pa) equals
14.69595 Pounds per square inch (psi)
Popular Conversions
Pascals (Pa)
101,325
Kilopascals (kPa)
101.325
Hectopascals (hPa)
1,013.25
Megapascals (MPa)
0.101325
Bar (bar)
1.01325
Atmospheres (atm)
1
Kips per square inch (ksi)
0.014696
Pounds per square inch gauge (psig)
-0
Torr (Torr)
760
Millimeters of mercury (mmHg)
759.99989
Inches of mercury (inHg)
29.9213
Inches of water column (inHâ‚‚O)
406.7825
Millibar (mbar)
1,013.25
Kilogram-force per square centimeter (kgf/cm²)
1.03323
How to Use This Calculator
Enter the pressure value
Provide the pressure reading you want to translate. Decimal values are supported.
Select input and output units
Choose from Pascal, kPa, MPa, bar, atm, psi, torr, or mmHg. The converter updates instantly.
Copy additional outputs
Quick reference cards display other units automatically—perfect for reporting or calibration notes.
Formula
Converted Value = Input Ă— (Conversion factor from source to Pascals) Ă· (Conversion factor from target to Pascals)
Conversions are routed through Pascals (Pa), the SI base unit, ensuring accuracy for sequential conversions.
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Pressure units vary across industries—pascals in science, psi in HVAC and automotive contexts, bar in process control, and torr or mmHg in vacuum systems. This converter brings them together so engineers, technicians, and researchers can communicate seamlessly.
With one input you can populate calibration reports, convert sensor outputs, or reconcile data sheets that straddle imperial and metric standards.
Pair this tool with the PSI to GPM Calculator or Torr to ATM Converter when you need flow or vacuum-specific calculations.
Frequently Asked Questions
What is the difference between torr and mmHg?
They are nearly equivalent vacuum units. The calculator uses precise conversion factors: 1 Torr = 133.322368 Pa and 1 mmHg = 133.322387 Pa.
Can I convert gauge pressure?
Yes—enter the gauge value. Just remember it is relative to atmospheric pressure; absolute values require adding or subtracting atmospheric pressure first.
Are conversion constants up to date?
The tool uses internationally accepted definitions (NIST/CODATA), ensuring scientific and engineering accuracy.
Does the converter handle large or negative pressures?
Yes. Negative inputs represent vacuum relative to the reference point, and large magnitudes are supported through floating-point precision.