Conversor de presión

Convierta psi a bar, bar a psi, kPa, atm, hPa, mmHg e inHg para neumáticos, meteorología y presión arterial, con una cadena de factores exacta.

Actualizado Ejemplos verificados: 4

Un número en la unidad de origen, o acompañado de su propia unidad
Probar
Valor convertido
bar
Valor convertido: 2.20632233381 bar
Cifras significativas: 12; Al más cercano; empates alejándose de cero
Conversión
32 psi ≈ 2.206322 bar
Factor de conversión
0.0689475729317
Exactitud
Definiciones exactas, decimal periódico

32 psi equivale aproximadamente a 2.206322 bar. Una unidad de libra por pulgada cuadrada equivale aproximadamente a 0.06894757 bar.

La misma cantidad expresada en cada unidad

psi32 psibar2.206322 bar
32 psi en cada unidad de Presión Filas: 11
UnidadValorDefinición
pascal (Pa)220,632.2Unidad base
hectopascal (hPa)2,206.3221 hPa = 100 Pa, exacto
kilopascal (kPa)220.63221 kPa = 1,000 Pa, exacto
megapascal (MPa)0.22063221 MPa = 1,000,000 Pa, exacto
bar2.2063221 bar = 100,000 Pa, exacto
standard atmosphere (atm)2.1774711 atm = 101,325 Pa, exacto
libra por pulgada cuadrada (psi)321 psi = 4.4482216152605/0.00064516 Pa, exacto
millimetre of mercury (mmHg)1,654.8781 mmHg = 133.322387415 Pa, exacto
torr (Torr)1,654.8781 Torr = 101,325/760 Pa, exacto
inch of mercury (inHg)65.152651 inHg = 3,386.389 Pa, aproximado (Valor convencional a 0 °C)
kilogram-force per cm² (kgf/cm²)2.2498231 kgf/cm² = 98,066.5 Pa, exacto
Cómo se calcula S
  1. Convertir libra por pulgada cuadrada a pascal

    32 psi×4.44822161526050.00064516 Papsi=220,632.233381 Pa32\ \text{psi} \times \tfrac{4.4482216152605}{0.00064516}\ \tfrac{\text{Pa}}{\text{psi}} = 220{,}632.233381\ \text{Pa}

    1 psi = 4.4482216152605/0.00064516 Pa, exacto

  2. Convertir pascal a bar

    220,632.233381 Pa÷100,000 Pabar=2.20632233381 bar220{,}632.233381\ \text{Pa} \div 100{,}000\ \tfrac{\text{Pa}}{\text{bar}} = 2.20632233381\ \text{bar}

    1 bar = 100,000 Pa, exacto

  3. Factor combinado

    1 psi=4.44822161526050.00064516100,000 bar≈0.0689475729317 bar1\ \text{psi} = \frac{\tfrac{4.4482216152605}{0.00064516}}{100{,}000}\ \text{bar} \approx 0.0689475729317\ \text{bar}

    Ambas unidades tienen definiciones exactas, pero el valor convertido es un decimal periódico; se muestra con 12 cifras significativas.

Acerca de Conversor de presión

Each pressure unit is a fixed number of pascals (newtons per square metre). The bar is exactly 100,000 Pa, the standard atmosphere 101,325 Pa and the torr 1/760 atm. The psi, one pound-force per square inch, is about 6,894.757 Pa, fixed exactly by the 1959 pound, standard gravity (9.80665 m/s²) and the 25.4 mm inch.

The default converts a 32 psi tyre pressure to 2.2063 bar. Weather maps use hectopascals (1 hPa = 1 mbar; standard sea-level pressure is 1,013.25 hPa), and blood pressure is recorded in millimetres of mercury.

Gauge and absolute readings convert with the same factor but are not interchangeable: a tyre gauge shows pressure above the surrounding air, so 32 psi on the gauge is about 46.7 psi absolute at sea level. The inch of mercury uses the conventional value at 0 °C and is marked approximate.

Ejemplos resueltos

32 psi tyre pressure in bar

Valor
32 psi
De
pound per square inch (psi)
A
bar
Valor convertido
2.2063223338 bar

Fuente de comprobación: 1 psi = 4.4482216152605 N ÷ (0.0254 m)² (NIST SP 811 App. B); 32 psi = 8896443230521/4032250000000 bar (Python 3.8 fractions from the legal definitions)

1 atm in psi

Valor
1 atm
De
standard atmosphere (atm)
A
pound per square inch (psi)
Valor convertido
14.6959487755 psi

Fuente de comprobación: 101325 Pa ÷ 6894.757293168… Pa (Python 3.8 fractions from the legal definitions)

760 torr is 1 atm

Valor
760 Torr
De
torr (Torr)
A
standard atmosphere (atm)
Valor convertido
1 atm
Exactitud
Exacto

Fuente de comprobación: 1 torr = 101325/760 Pa by definition (NIST SP 811 App. B)

1 inHg (conventional value)

Valor
1 inHg
De
inch of mercury (inHg)
A
pascal (Pa)
Valor convertido
3,386.389 Pa
Exactitud
Aproximado

Fuente de comprobación: NIST SP 811 App. B.9: inch of mercury (0 °C) = 3.386389 E+03 Pa

Preguntas

How do I convert psi to bar?

Divide by 14.5038, or multiply by 0.0689476. A bar is 100,000 Pa and a psi 6,894.757 Pa, so 1 bar = 14.5038 psi. A 32 psi tyre is 2.2063 bar, and a 2.5 bar tyre is 36.26 psi.

Is 1 bar the same as 1 atmosphere?

No, though they are within 1.3%. The bar is exactly 100,000 Pa, while the standard atmosphere is exactly 101,325 Pa, which is 1.01325 bar, 14.696 psi or 760 mmHg. The atmosphere was set to match average sea-level air pressure, which is why weather charts centre on 1,013.25 hPa.

What is the difference between psig and psia?

psig is gauge pressure, measured relative to the surrounding air; psia is absolute pressure, measured from a vacuum. At sea level psia = psig + 14.696. Tyre and compressor gauges read psig, so a flat tyre shows 0 psig while still holding 14.7 psia of air. The converter treats both alike, so keep input and output the same kind.

Are mmHg and torr the same?

Almost. A torr is exactly 1/760 of a standard atmosphere, 133.322368 Pa, while the conventional millimetre of mercury is 133.322387415 Pa; they differ by about 0.14 parts per million. For blood pressure the difference never matters: 120/80 mmHg is 16.0/10.7 kPa either way.

How do I convert inches of mercury to hPa?

Multiply by 33.8639: 29.92 inHg is 1,013.2 hPa, the standard altimeter setting in US aviation. This converter uses the conventional inch of mercury at 0 °C, 3,386.389 Pa (NIST SP 811), and marks results that use it as approximate because mercury's density changes with temperature.

¿Qué precisión tiene «Conversor de presión»?

La precisión depende de tus datos y de los supuestos del método. El cálculo decimal usa 50 cifras significativas, pero las estimaciones, los métodos numéricos y los datos de origen pueden ser menos precisos; el redondeo mostrado no elimina esos límites. Ejemplos resueltos comprobados con fuentes independientes: 4. Por ejemplo, «32 psi tyre pressure in bar» se comprueba con 1 psi = 4.4482216152605 N ÷ (0.0254 m)² (NIST SP 811 App. B); 32 psi = 8896443230521/4032250000000 bar (Python 3.8 fractions from the legal definitions).

¿De dónde procede el método?

NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors; NIST Handbook 44, Appendix C — General tables of units of measurement.

Acerca de esta calculadora

xto=xfrom×ffromftof=one unit expressed in Pa\begin{gathered} x_{\text{to}} = x_{\text{from}} \times \dfrac{f_{\text{from}}}{f_{\text{to}}} \\ f = \text{one unit expressed in } \text{Pa} \end{gathered}

Fuentes

  1. NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors
  2. NIST Handbook 44, Appendix C — General tables of units of measurement

Verificado con las referencias

Esta calculadora incluye 4 ejemplos resueltos con respuestas de fuentes independientes. Forman parte del conjunto de pruebas y también puedes ejecutarlos aquí.

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