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Pressure

Force per unit area. SI base: pascal (Pa).

所有Pressure單位（8）

pascal
Pa
1 N/m². SI unit of pressure.
kilopascal
kPa
1000 Pa. Tire pressure (typical).
bar
bar
100,000 Pa. Diving, hydraulics.
millibar
mbar
100 Pa. Meteorology.
pound per square inch
psi
About 6.9 kPa. US tire pressure, plumbing.
atmosphere
atm
Standard atmospheric pressure at sea level.
torr
Torr
1/760 atmosphere. Vacuum.
millimetre of mercury
mmHg
Traditional blood pressure unit.

熱門Pressure換算

pascal → kilopascal pascal → bar pascal → millibar pascal → psi pascal → atmosphere pascal → torr pascal → mmhg kilopascal → pascal kilopascal → bar kilopascal → millibar kilopascal → psi kilopascal → atmosphere kilopascal → torr kilopascal → mmhg bar → pascal bar → kilopascal bar → millibar bar → psi bar → atmosphere bar → torr bar → mmhg millibar → pascal millibar → kilopascal millibar → bar millibar → psi millibar → atmosphere millibar → torr millibar → mmhg psi → pascal psi → kilopascal psi → bar psi → millibar psi → atmosphere psi → torr psi → mmhg atmosphere → pascal atmosphere → kilopascal atmosphere → bar atmosphere → millibar atmosphere → psi atmosphere → torr atmosphere → mmhg torr → pascal torr → kilopascal torr → bar torr → millibar torr → psi torr → atmosphere torr → mmhg mmhg → pascal mmhg → kilopascal mmhg → bar mmhg → millibar mmhg → psi mmhg → atmosphere mmhg → torr

Frequently Asked Questions

What is the SI base unit of pressure?

The SI base pressure unit is Pa. Most conversions factor through it, except temperature which is affine and fuel-economy which is reciprocal.

Which unit systems are represented?

Pressure includes both metric and imperial units (where they exist in this category). For mass and length, both metric (kg, m) and US customary (lb, ft) are listed. For temperature, the three most-common scales (Celsius, Fahrenheit, Kelvin) plus Rankine and Réaumur.

How accurate are these conversions?

Conversions use the standard SI factors (NIST values where applicable). Where two slightly different definitions exist (e.g. KB vs KiB, US vs UK gallon), they are listed as separate units rather than auto-rounded.

其他分類

#1
Length

Distance, height, width — anything that measures how long something is. SI base unit: the metre (m).

 #2
Mass

How much matter is in something. Differs from weight (which is force). SI base: kilogram (kg).

 #3
Temperature

How hot or cold something is. Conversions are affine — there is an offset, not just a multiplier.

 #4
Area

Size of a 2-D surface. SI base: square metre (m²).

 #5
Volume

Space occupied by a 3-D object. SI base: litre (L) for everyday use; cubic metre (m³) for SI.

 #6
Speed

Distance per unit time. SI: metre per second (m/s).

 #7
Time

Duration. SI base: the second (s).

 #8
Data

Digital information size. SI: the byte (B). Note the difference between decimal (KB=1000) and binary…

 #9
Energy

Capacity to do work. SI base: joule (J). Also commonly expressed as calories, kWh, BTU.

 #10
Angle

Rotation or turning. SI base: radian (rad).

 #11
Fuel Economy

Distance per unit of fuel, or its reciprocal (fuel per distance). Base: litres per 100 km.