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Cooking Thermometer Calibration: Methods and Checks

Use an ice-point or boiling-point check to find whether a thermometer reads correctly. Adjust it only if its instructions allow, then record the result.

Cooking thermometer calibration tells you whether the displayed temperature matches a known reference. The ice-point method is convenient for routine checks; a boiling-point method can cover the upper end but must account for elevation and local atmospheric conditions.

Cooking Thermometer Calibration: Methods and Checks

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Common questions

Questions before you buy

How do you calibrate a cooking thermometer with ice water?

Fill a container with crushed ice, add clean water, stir, and place the sensing area in the slurry without touching the container. Wait for a stable reading and follow the instrument instructions if adjustment is permitted.

What should a food thermometer read in ice water?

At equilibrium, a properly prepared ice-water slurry represents 32°F at normal conditions. Poor ice-to-water ratio or contact with the cup can distort the check.

How often should a meat thermometer be calibrated?

Check it on the schedule required by your operation and after a drop, extreme temperature exposure, or a suspicious reading. Food-service procedures may require more frequent documented checks.

What belongs in a food-service thermometer calibration log?

Record the thermometer identifier, date, reference method, initial reading, any adjustment, final reading, and the person completing the check.