pressure unit converter
Convert Pressure units, compare 22 unit definitions and explore formulas, examples and common questions.
Pressure converter
Popular conversions
Complete unit directory22 units
Choose a source unit to see every available target unit. Each directory has a stable address.
- Physical atmospheresatm
- Barsbar
- Centimetres of watercmH2O
- Centimetres of mercurycmHg
- Feet of waterftH2O
- HectopascalshPa
- Inches of waterinH2O
- Inches of mercuryinHg
- kgf/cm²kgf/cm²
- kgf/m²kgf/m²
- KilopascalskPa
- Kilopounds per square inchksi
- Metres of watermH2O
- Millimetres of mercurymmHg
- MegapascalsMPa
- Newtons per square metreN/m²
- PascalsPa
- Pounds per square footpsf
- Pounds per square inchpsi
- Torrtorr
- Technical atmospheres
- Millibars
No matching units. Try a name or symbol.
How to use this calculator
- Enter the value you want to convert.
- Choose the source and target units, then adjust the display precision if needed.
- Read the result. Select Convert to open a page for this value, or use the table below.
Definitions and assumptions
Pressure factors are expressed relative to pascals. A standard atmosphere is exactly 101325 Pa and one bar is exactly 100000 Pa. Liquid-column units use conventional reference values; actual pressure depends on density and gravity.
Frequently asked questions
Which Pressure units are supported?
The directory lists 22 units, including symbols and availability. Choose any source unit to browse its target units.
how to convert psi to kPa?
The calculator converts the input to the category's reference unit, then divides by the target unit's factor. 1 × 6.89475729317 ≈ 6.894757 Kilopascals. Use the source and target factors shown in the formula. The worked example uses the value on this page, and the table provides other common values.
Does this convert gauge pressure to absolute pressure?
The tool changes units only. Converting gauge pressure to absolute pressure also requires the reference atmospheric pressure, which must be added separately in consistent units.
Why is the displayed result rounded?
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
What input range can I use?
This calculator accepts non-negative values up to 1 trillion, with up to 8 decimal places. It does not calculate signed vectors or calendar date intervals.
Why is a unit unavailable?
A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.
Sources and methodology
Methods and sources · Content revised
Report a problem