Health

Car Heat Calculator

See how fast a parked car heats up — protect children and pets.

Outside Temperature (°F)

Time in Car (minutes)

Windows

Interior Temperature—

Temperature Rise—

Danger Level—

Based on San Francisco State Dept. of Geosciences research. Cars heat ~19°F in 10 min, ~29°F in 20 min, ~34°F in 30 min, ~43°F in 60 min.