QuickCare: How to get accurate readings with your thermometer

The Kinsa QuickCare thermometer takes accurate oral, underarm, and rectal readings. But if you have run into any difficulties, you’ve come to the right spot! Below are some tips and tricks to make sure your QuickCare is as accurate as possible:

Thermometer Accuracy Overview

  • Relax before taking the reading. Don’t take a temperature right after exercising or chasing your toddler around the house.
  • Don’t take your temperature immediately after taking a hot shower or a warm bath.
  • Don’t take your temperature immediately after having had anything to drink: ice water, hot soup, apple juice, or anything else for that matter.
  • Before using, please avoid holding the thermometer from the tip as your body temperature from your hand can cause an error. 
  • Lastly, be sure to store your thermometer in a cool dry spot away from heat and moisture. 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 (often varying by a full degree or more) so always put the tip in the same heat pocket for every reading.

For Rectal Readings

This is the most effective and accurate way to take a wee baby's temperatures. If you're a new parent, taking a rectal reading might be intimidating, but don’t fret - our very own Nurse Blake has written this fantastic guide just for you.

Note: Rectal readings can be ~1°F warmer than oral readings.

For Underarm Readings

Sleeves and other clothes need to be pulled up and out of the way or they will interfere with readings - the thermometer needs to have complete skin contact. Again, make sure no bathing has occurred before a reading is taken or the temperature might not be accurate.


  • Underarm readings are considered to be the least accurate way of measuring temperature with a stick thermometer, according to the Mayo Clinic.
  • The Kinsa app automatically takes underarm placement into account when calculating the severity of the fever. But it does not use the well-known rule of thumb of artificially adding that 1°F to that underarm reading. Learn more here.