Thermometers must be calibrated to ensure the accuracy of your readings. How can we do this simplyThermometers can be calibrated with boiling water (100°C) or with ice (0°C). The simplest way to calibrate is with ice and water. To do this:

1. Fill a glass or bowl with equal parts crushed ice and water.

2. Place the probe of the thermometer in the bowl/glass of equal parts crushed ice and water.

3. Make sure the thermometer tip is not touching the sides or bottom of the glass.

4. Watch the needle on the face of the thermometer as it goes down. We know ice water is 0°C/32°F. If the needle drops to 0°C or 32°F, we know that the thermometer readings are accurate and it has been successfully calibrated.

5. If the temperature reading is off, adjust the nut on the back with a set of pliers, until the needle points to 0°C/32°F.