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Calculating pressure change with temperature?

  1. Apr 29, 2007 #1


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    How do I determine pressure in psi, if I know the temperature. Like I aired my tires up to 80psi at 80F, how would I calculate what the pressure in my tires would be at 90F?
  2. jcsd
  3. Apr 29, 2007 #2


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    Staff: Mentor

    With a constant volume: P1/T1=P2/T2. T is absolute temperature, so 80F is actually 80+460=540 R (Rankine scale).
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