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    Translate kilopascals, bar, atmospheres, and psi without recalculating from scratch.

    Pressure Conversion Cheat Sheet

    Pressure units span mechanical engineering, meteorology, and scuba diving. This page highlights how they line up and when each one appears in the field.

    Because pressure equals force divided by area, unit systems vary widely. Use the table to compare readings from gauges, weather bulletins, or hydraulic equipment.

    Base unit

    Pascal (Pa)

    Units covered

    5

    Popular conversions

    2

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    20 options
    Pa → kPaPascal to KilopascalView detailsPa → psiPascal to Pound per square inchView detailsPa → barPascal to BarView detailsPa → atmPascal to AtmosphereView detailskPa → PaKilopascal to PascalView detailskPa → psiKilopascal to Pound per square inchView detailskPa → barKilopascal to BarView detailskPa → atmKilopascal to AtmosphereView detailspsi → PaPound per square inch to PascalView detailspsi → kPaPound per square inch to KilopascalView detailspsi → barPound per square inch to BarView detailspsi → atmPound per square inch to AtmosphereView detailsbar → PaBar to PascalView detailsbar → kPaBar to KilopascalView detailsbar → psiBar to Pound per square inchView detailsbar → atmBar to AtmosphereView detailsatm → PaAtmosphere to PascalView detailsatm → kPaAtmosphere to KilopascalView detailsatm → psiAtmosphere to Pound per square inchView detailsatm → barAtmosphere to BarView details

    Unit breakdown

    Every unit below references the SI base value so you can compare readings quickly.

    UnitSymbol1 unit in PaNotes
    PascalPaReference unit—
    KilopascalkPa1 kPa = 1K Pa—
    Pound per square inchpsi1 psi = 6.89K Pa—
    Barbar1 bar = 100K Pa—
    Atmosphereatm1 atm = 101.33K Pa—

    Popular conversions

    These presets mirror the quick actions available inside the SwapUnits converter.

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    ConversionExampleReference pageWhy it matters
    PSI to Kilopascals1 psi = 6.89476 kPaOpenIdeal for quick checks inside the live converter.
    Pascals to Atmospheres1 Pa = 9.8692×10^-6 atmOpenIdeal for quick checks inside the live converter.

    Frequently asked questions

    Why do tire gauges use psi in some countries and kPa in others?

    Psi is common in the US, while Canada, Europe, and many Asia-Pacific countries use kilopascals. Every modern tire sidewall lists both, so you can always cross-check.

    How do I compare gauge pressure to absolute pressure?

    Absolute pressure equals gauge pressure plus atmospheric pressure. Add roughly 101.3 kPa (or 14.7 psi) to convert gauge readings to absolute values at sea level.

    What is bar used for?

    Bar is convenient for industrial hydraulics because it stays close to atmospheric pressure values. Many European pumps, compressors, and diving instruments quote bar alongside psi or kPa.

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