How to take great readings


The wireless Kinsa QuickCare (and the discontinued wired Smart Stick) can take great oral, underarm and rectal measurements when used properly with the right technique.

The most common reason for problem readings stem from how they’re taken, so follow these steps to get great readings every time:


Pro Tips for All Types of Readings

  • Don’t take any readings after eating, drinking or exercising.

  • For QuickCare, always wait for three flashing lines on the display BEFORE putting the tip in your mouth, armpit, etc. Check for these three flashing lines before every reading.

  • If you or your Kinsa were somewhere with a different temperature (like outside on a cold day) wait until you and your Kinsa are used to the new temperature before taking a reading.


For Oral Readings

For oral readings, always put the tip in your mouth’s heat pocket; under the tongue at the back of the mouth.

The temperature in one spot of the mouth can be very different from another (see picture below) so always put the tip in the same heat pocket for every reading.



For Underarm Readings

Make sure that no clothes are in the way, and that there has been no exercise or bathing in the 15 minutes before the reading is taken. Also, please note that underarm readings are typically 1°F lower than oral readings; this is perfectly normal.

The Kinsa app automatically takes underarm readings into account when calculating the severity of the fever, but it does not artificially add that 1°F to the temperature reading.

For Rectal Readings

Rectal readings are the best way to measure your baby's temperature. To keep your baby as comfortable as possible while still getting great readings, follow this dedicated guide:

How to take your baby's rectal temperature


NOTE  If you're still getting inconsistent readings after following the Important Tips above, try following these steps:

  1. Check that your phone is compatible with your Kinsa thermometer by visiting
  2. If you have a Kinsa Smart Stick, make sure that you have the latest version of the Kinsa app, available for free from the Apple App Store and Google Play Store.
  3. Again, if you have the Kinsa Smart Stick, you may want to try recalibrating your Kinsa by following these guides for iPhone and Android.



Video Guides for Kinsa Smart Stick

How to take an oral reading with the Kinsa Smart Stick  

How to take an underarm reading with the Kinsa Smart Stick 


Written Guide for Kinsa Smart Stick

  1. Open the Kinsa app on your smartphone.
  2. Plug the Kinsa thermometer into your phone. It’s recommended that you use the extension cord that came with the Kinsa as it will likely help return a more accurate reading (and will be more comfortable).
  3. On the temperature tab, choose your method for taking a temperature (oral, underarm, or rectal).
  4. Place the thermometer according to your desired reading location (under the base of the tongue, in the bend of the armpit, or with only the silver tip placed in the rectum)



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