If you find your digital thermometer displaying temperatures in Celsius when you prefer Fahrenheit, don't fret! Changing it is a breeze. Whether it's a traditional one-button, frontal, or infrared model, we've got you covered with simple steps.
Key Points to Remember:
- For one-button thermometers, just hold down the power button to switch modes.
- Frontal thermometers typically have a “°C/°F” or settings button. Press it, and if necessary, use the arrows or ‘+’ and ‘-’ buttons to adjust.
- Infrared thermometers usually have a switch in the battery compartment for changing units.
Quick Steps:
1. For one-button thermometers, hold the power button.2. On frontal thermometers, locate and press the “°C/°F” or settings button.3. For infrared thermometers, toggle the switch in the battery compartment.
Mastering One-Button Digital Thermometers

Switch Off Your Thermometer. Most digital thermometers featuring a single button operate by using the power button to toggle between Celsius and Fahrenheit. Start by ensuring the thermometer is powered off.
- Popular brands with this functionality include Vicks, Walgreens, and Omron.

Hold Down the Power Button. While powering on the thermometer, keep your finger firmly pressed on the button. This signals to the device that you intend to change the mode, not just turn it on.

Release the Button Upon Mode Change. Look for the Fahrenheit symbol on the display and let go of the button. Some thermometers may also emit a beep to indicate the mode switch.
- If you see “F-SET” instead of a blinking °F, it signifies a successful mode change.
- If the display shows °C or “C-SET,” you've entered Celsius mode. Repeat the process to revert to Fahrenheit.
Advanced Techniques for Electronic and Frontal Thermometers

Locate the Configuration Button. This button might be marked with labels like “MODE,” “SET,” or “MEM,” or it could bear symbols such as a person or a speaker. Hold it down to switch between Celsius and Fahrenheit.
- Manufacturers like HoMedics and Equate typically include clearly labeled configuration buttons on their electronic thermometers.

Utilize the Arrow or ‘+’ and ‘-’ Buttons to Toggle to °F. Some thermometers require pressing the configuration button to access multiple settings, including temperature units. If so, press the button repeatedly until you reach the temperature settings, then use the arrows or ‘+’ and ‘-’ buttons to switch to Fahrenheit.
- The flashing or change to °F indicates you’ve entered the temperature settings.

Activate the “°C/°F” Button. Frontal scanning thermometers may feature a dedicated “°C/°F” button, usually located on the front or side. Use this button to effortlessly switch between Celsius and Fahrenheit.
Unlocking the Secrets of Infrared Thermometers

Engage the Configuration Button. Look for labels like “MODE” or “SET” on this button, which is commonly used to adjust temperature settings. Pressing it once may switch from °C to °F, but you might need to press multiple times to access the temperature settings and make the change.
- To confirm you’re in the temperature unit settings, check for flashing on the screen. The current unit will be flashing, and you can switch it using the arrow keys.
- For certain infrared thermometers, like those from Klein Tools and Beurer, the configuration button doesn't control temperature units. Instead, it adjusts warning alarms and other modes, while temperature unit controls are found in the battery compartment.

If the Settings Button Fails, Access the Battery Compartment. Locate the groove on the thermometer handle's side and slide your thumb into it to open the compartment. Infrared thermometers often have temperature unit controls here.
- If the compartment cover is stubborn, gently insert a flathead screwdriver between the cover and handle, wiggling it to open. Be cautious not to apply too much force or damage the plastic or batteries.

Toggle the Switch Above the Batteries. Flip it towards the ‘°F’ position to view temperatures in Fahrenheit. Return it to Celsius by flipping it back.
Useful Tips
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If all else fails, convert to Fahrenheit by multiplying your temperature by 1.8 and adding 32.