> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sonohealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Choose a Thermometer for Your Family

> A buying guide to home thermometers: matching the method to each age, what makes a good infrared or digital device, accuracy for newborns, and building a two-thermometer setup.

The "best" thermometer depends mostly on who you're measuring. A newborn, a squirmy toddler, and an adult call for different methods, and many households are best served by keeping two devices. This guide helps you choose.

<Note>
  A thermometer measures temperature; it doesn't diagnose illness. In a baby under 3 months, any fever of 100.4°F (38°C) or higher is urgent — call your pediatrician right away.
</Note>

## Match the method to the age

Accuracy depends heavily on age and method. For **newborns and infants under \~3 months**, a rectal digital reading is the gold standard. From about 3 months to 3 years, rectal is still most reliable, with forehead or ear as a quick check. For **older children and adults**, forehead, ear, or oral all work well. See [how to take a baby's temperature by age](/thermometer/fever-in-children-guide).

## What makes a good infrared (no-touch) thermometer?

Infrared forehead and ear thermometers read in a second or two without contact — ideal for quick screening and for checking a sleeping child without waking them. Look for fast, repeatable readings and a clear display. Our [infrared thermometer guide](/thermometer/infrared-thermometer-guide) covers technique, which matters as much as the device.

## What about a digital stick thermometer?

A digital (contact) thermometer measures directly in the mouth, underarm, or rectum and is often used to **confirm** a reading. For families with infants it's the most accurate choice for the youngest babies. It's slower than infrared but dependable.

## Should I get more than one?

For many families the ideal setup is two: an **infrared forehead/ear thermometer** for fast everyday screening and a **digital stick** for confirmation and for the youngest babies. That combination covers all ages and situations.

## How SonoHealth fits

SonoHealth offers the **ThermoPRO** forehead-and-ear infrared thermometer and the **ThermoMax** thermometer for home temperature checks. Whatever you choose, use the same method consistently and note which method you used, since normal ranges differ slightly by site. Browse them at [SonoHealth.com](https://sonohealth.com/shop/).

***

**Related:** [Forehead vs. Ear vs. Oral](/thermometer/forehead-vs-ear-vs-oral) · [Infrared Thermometer Guide](/thermometer/infrared-thermometer-guide) · [Fever in Children Guide](/thermometer/fever-in-children-guide) · [How to Take an Accurate Temperature](/thermometer/how-to-take-accurate-temperature)