Tool

Hygrometer Calibration Helper

By Jonathan West · Updated October 31, 2026

Calculate a reference-point humidity offset and avoid applying the same correction twice.

Use the reference value and conditions specified by your calibration kit. For its 75% kit, Boveda specifies at least 24 hours sealed at room temperature (65–75°F / 19.5–23.5°C). Other references may require different conditions.

Device name (optional)

Reference humidity (% RH)Hygrometer reading in reference (% RH)Current hygrometer reading (% RH)

The sealed reference has reached its required time and conditionsI already applied this correction to the device or its app

Enter readings from 0 to 100% RH and confirm that the reference is ready before calculating a correction.

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