Hot Car Calculator: Interior Temperature and Heatstroke Risk

Your details

The ambient air temperature outside the parked vehicle.
F
How long the vehicle has been parked with no air conditioning running.
min
How much direct sunlight the vehicle is receiving.
Dark cars absorb about 10% more solar heat than light-colored cars.
Cracked windows reduce peak interior temperature by only 3-5 F in most studies.
Estimated interior temperatureExtreme danger
114.4

Cabin air temperature after the parked time you entered

Temperature rise above ambient29.4
Estimated child body temperature103.6
Time to child hyperthermia (100.4 F / 38 C)15 min
Time to life-threatening child temp (104 F / 40 C)33 min
Dog risk levelExtreme danger - fatal range
_ambientC29.4
_interiorC45.8
_childBodyC39.8
45.8 C
Low risk<30Caution30-38Hazardous38-40Dangerous40-41.7Extreme danger41.7+

Extreme danger: estimated cabin temperature 114.4 F.

  • After 30 minutes, the cabin has risen 29.4 F above outside air to reach 114.4 F.
  • A child inside would begin experiencing hyperthermia at an estimated body temperature of 103.6 F.
  • Dogs cannot cool themselves by sweating and reach dangerous heat exhaustion temperatures quickly in conditions like these.

Next stepIf you see a child or pet in a hot vehicle in this condition, call 911 immediately.

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