Tire Pressure: Cold Day (273 K) vs. Hot Road (323 K)
Calculate how tire pressure rises when temperature increases from a cold 273 K to a hot 323 K at fixed volume.
How to use this tool
- Enter initial pressure p₁, initial volume v₁, initial temperature t₁, final pressure p₂, final volume v₂ and final temperature t₂ in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your final pressure p₂ and the full breakdown beneath it.
Tire pressure increases noticeably in summer heat because the gas volume is fixed inside the tire while temperature climbs.
Frequently asked questions
- How is this different from the ideal gas law?
- The combined gas law relates two states of the same gas sample without needing to know the moles or R. The ideal gas law (PV=nRT) gives absolute values.
- What is Boyle's Law?
- Boyle's law is the special case where T is constant: P₁V₁ = P₂V₂.