Crickets Chirping Thermometer Calculator

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Dolbear's Law was calibrated on the snowy tree cricket (Oecanthus fultoni). Field cricket estimates use the same slope but a shifted intercept.
Pick how long you plan to count chirps. The 14-second window is the most-cited shortcut: count chirps, add 40, get Fahrenheit. The 8-second window gives Celsius directly.
Listen for one full chirp burst. Each distinct "crick" counts as one chirp. Count only complete chirps heard during the window.
chirps
Temperature (°F)Cool
60.4°F

Estimated air temperature in Fahrenheit via Dolbear's Law

Temperature (°C)15.8°C
Chirps per minute81chirps/min
60.4 °F
Below threshold<50Cool50-65Comfortable65-80Warm80-90Hot90+

Estimated temperature: 60.4 °F (snowy tree cricket)

  • You counted 19 chirps, which extrapolates to roughly 81 chirps per minute.
  • The snowy tree cricket formula is the most reliable version of Dolbear's Law, typically accurate to within 1-2 degrees under calm conditions.
  • Best results come from still air away from buildings, counting a single cricket steadily chirping for the full window.

Next stepCompare with a nearby thermometer to calibrate your local cricket population. Results improve if you average three separate 60-second counts.

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