Best Rectal, Oral & Axillar Thermometers of 2026

Phoebe Cooper Avatar
Phoebe Cooper
Last Updated: 6 Feb 2026

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Thermometers are a crucial tool for monitoring body temperature, especially in times of illness. Rectal, oral and axillary thermometers are three types of thermometers that can be used to measure body temperature. Rectal thermometers are inserted into the rectum for an accurate reading, while oral thermometers are placed under the tongue. Axillary thermometers are placed under the armpit, making them the most non-invasive option. All three types of thermometers are widely available and can be used at home or in medical settings. It is important to follow the instructions carefully and to seek medical advice if necessary.

At a Glance: Our Top Picks

femometer Digital Thermometer for All Ages Cover #TOP 1
femometer Digital Thermometer for All Ages
ftb score rating icon 9.8
iProven DTR-1221R Digital Oral Thermometer Cover #TOP 2
iProven DTR-1221R Digital Oral Thermometer
ftb score rating icon 9.7
GERATHERM Classic Clinical Thermometer without Mercury Cover #TOP 3
GERATHERM Classic Clinical Thermometer without Mercury
ftb score rating icon 9.5

Top 10 Rectal, Oral & Axillar Thermometers

#TOP 1

femometer Digital Thermometer for All Ages

2032
Green
femometer Digital Thermometer for All Ages Cover
Digital Thermometer, Oral Thermometer Adults Kids Babies, Accurate Fast Switchable Body Temperature Thermometer, Green

The femometer Digital Thermometer is designed for accurate and safe temperature readings, which is essential for knowing when to seek medical care during a fever. With its convenient storage case, you can easily track your family's temperatures while on the go. The clear LCD screen ensures you can read the results effortlessly, while the last memory recall feature helps you keep track of previous readings. Additionally, switching between Celsius and Fahrenheit is simple, catering to your personal preference.

What We Like
Accurate temperature readings
Convenient storage case included
Clear LCD screen display
Versatile for all ages
Easy unit switching
#TOP 2

iProven DTR-1221R Digital Oral Thermometer

DT-R1221A
Grey
iProven DTR-1221R Digital Oral Thermometer Cover
iProven Oral Thermometer, Measures in 10 Seconds with Flexible tip and Fever Alarm, Digital Medical Thermometer for Adults, Kids and Toddlers - DTR-1221R

The iProven DTR-1221R Thermometer offers quick and accurate results, measuring temperatures in just 10 seconds. This is particularly useful for parents needing to check their child's temperature swiftly. Its soft and flexible tip ensures comfort during use, whether orally or rectally, allowing you to take readings safely even if your little one is restless. Cleaning is a breeze, as it is waterproof, enabling you to maintain hygiene effortlessly. Additionally, the clear fever indication with smileys helps you easily communicate your child's condition.

What We Like
Quick 10-second readings
Flexible and soft tip
Waterproof for easy cleaning
Clear fever indication
#TOP 3

GERATHERM Classic Clinical Thermometer without Mercury

classic
transparent
classic
GERATHERM Classic Clinical Thermometer without Mercury Cover
Classic Thermometer

The GERATHERM Classic Thermometer is a high-quality, German-made clinical thermometer that ensures accurate temperature readings without the use of mercury. Its innovative liquid metal alloy allows for reliable measurements, giving you peace of mind when monitoring your health. This thermometer is 100% hygienic and hypoallergenic, making it suitable for allergy sufferers, and it can be used rectally, axillary, or orally. Additionally, it is waterproof and easy to clean, ensuring that maintaining hygiene is straightforward for you.

What We Like
Mercury-free design
Hygienic and easy to clean
Accurate temperature readings
Multiple usage methods
Made in Germany
#TOP 4

femometer Digital Thermometer with Flexible Tip

DMT-427
femometer Digital Thermometer with Flexible Tip Cover
Digital Thermometer with Flexible Tip - Fast Accurate Oral, Underarm & Rectal for Adults, Kids & Baby

The femometer Flexible Digital Thermometer offers fast and accurate temperature readings in just 1 to 1.5 minutes, making it ideal for quick checks when you need them most. Its flexible, waterproof tip ensures comfortable use and easy cleaning, helping you maintain hygiene effortlessly. Lightweight and easy to operate, this mercury-free thermometer is safe for the whole family, including adults, children, and babies. Designed for multiple uses, you can rely on it for oral, underarm, or rectal measurements, giving you versatility and durability in one device.

What We Like
Fast and accurate readings
Flexible, waterproof tip
Lightweight and easy use
Multiple use options
Mercury-free and safe
#TOP 5

Citizen CTA303 Digital Thermometer with Fever Alarm

CTA-303
White
Citizen CTA303 Digital Thermometer with Fever Alarm Cover
Citizen Digital Thermometer for Basal Body Temperature Readings - Body Temperature Thermometer with Fever Alarm and One Button Operation - Adults, Kids, Ovulation, Newborn, and Baby Thermometers

The Citizen CTA303 Thermometer is designed for maximum safety and hygiene, featuring an antibacterial casing that reduces the risk of cross-contamination. Its water-resistant design makes it easy to clean, ensuring a hygienic experience for you and your family. You will appreciate the high-temperature alert, which notifies you with beeps if a fever is detected, allowing for quick action. Additionally, this thermometer provides fast and accurate readings, giving you precise results in just 60 seconds for oral or rectal use, ensuring you stay informed about your health.

What We Like
Antibacterial casing for safety
Water-resistant and easy to clean
High-temperature alert feature
Fast and accurate readings
Convenient storage case included
#TOP 6

A&D Medical UT-103 Digital Fever Thermometer

UT-103
White/Blue
1 Count (Pack of 1)
A&D Medical UT-103 Digital Fever Thermometer Cover
A&D Medical UT-103 Digital Thermometer

The A&D Medical UT-103 Thermometer is a versatile digital fever thermometer suitable for oral, axillary, or rectal use, making it highly convenient for various situations. It beeps when the measurement is complete, ensuring you know exactly when to check the reading. With last reading memory, you can easily track temperature changes without having to remember previous results. Additionally, its water-resistant design means it can withstand spills and is easy to clean, enhancing hygiene for you and your family.

What We Like
Multiple measurement methods
Audible completion signal
Memory of last reading
Water-resistant design
#TOP 7

Amazon Basic Care Digital Thermometer with Flexible Tip

Amazon Basic Care
5400606955745
Blue
1 Count (Pack of 1)
Amazon Basic Care Digital Thermometer with Flexible Tip Cover
Amazon Basic Care Digital Thermometer, Blue

The Amazon Basic Care Thermometer offers a quick and accurate way to check your body temperature. With its flexible tip, it ensures comfort during use, whether you measure orally, rectally, or in the armpit, making it suitable for all ages. It provides results in about 60 seconds, signalling readiness and completion with sound alerts. The thermometer also features a last measurement memory, so you can easily track your temperature changes over time.

What We Like
Quick and accurate readings
Flexible and comfortable tip
Last measurement memory
Easy to use
Water resistant
#TOP 8

Fast and Accurate Medical Thermometer for All Ages

IN-226-EU
White
Fast and Accurate Medical Thermometer for All Ages Cover
Temperature Thermometer for Adults Kids and Children - Fast and Accurate Easy to Use Body and Oral Thermometer with Fever Alarm Child

The Thermometer World Oral Thermometer is designed for all ages, including adults, children, and infants. It offers quick and accurate readings, ensuring you can monitor your family's health with ease. The built-in fever alarm alerts you when the temperature is elevated, providing peace of mind during illness. With its easy-to-read display and helpful beep sound when measurements are complete, you will find it convenient to use, making temperature checks a hassle-free task for everyone in the household.

What We Like
Fast temperature readings
Built-in fever alarm
Easy to read display
Suitable for all ages

Beurer FT 13 Waterproof Flexible Digital Thermometer

FT13-79109
White
Beurer FT 13 Waterproof Flexible Digital Thermometer Cover
Beurer FT 13 Waterproof Flexible Digital Thermometer with Optical and Sound Fever Alert, Comfortable Fever Measurement for Babies, Children and Adults

The Beurer FT 13 Thermometer offers a range of features that make it ideal for all ages. Its fever alarm notifies you with both visual and audible alerts, ensuring you are aware when temperatures exceed normal levels. The flexible and waterproof design allows for comfortable measurements, whether rectal, oral, or axillary. With an automatic stop function, you don’t have to worry about battery drain, as it turns off when not in use. Additionally, the memory function helps you keep track of temperature changes over time.

What We Like
Fever alarm with visual and sound
Flexible and waterproof design
Automatic shut-off feature
Memory function for tracking
Easy to clean
#TOP 10

Pic Solution VedoecoPlus Traditional Glass Thermometer

02023015010000
White
1 Stück (1er Pack)
Pic Solution VedoecoPlus Traditional Glass Thermometer Cover
Pic Solution VedoecoPlus Glass Thermometer Pack of 1

The Pic Solution VedoecoPlus is a traditional glass thermometer that uses galinstan, a safe compound free from mercury, making it a practical choice for health monitoring. You can measure your body temperature in the armpit, mouth, or rectally, using methods you are already familiar with. Thanks to its built-in magnifying glass, reading your temperature is simple and clear, reducing any guesswork. Additionally, its ergonomic quick cooler allows you to reset the thermometer quickly and effortlessly after each use, saving you time and effort.

What We Like
Mercury-free galinstan compound
Measures in three body areas
Easy-to-read magnifying glass
Quick and simple cooling
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Can you use the same thermometer for rectal and oral?

Oral and rectal thermometers have different shapes and one should not be substituted for the other. Do not use oral thermometers rectally as these can cause injury. Rectal thermometers have a security bulb designed specifically for safely taking rectal temperatures.

2. What is the difference between oral rectal and axillary temperature?

A rectal temperature is 0.5°F (0.3°C) to 1°F (0.6°C) higher than an oral temperature. An ear (tympanic) temperature is 0.5°F (0.3°C) to 1°F (0.6°C) higher than an oral temperature. An armpit (axillary) temperature is usually 0.5°F (0.3°C) to 1°F (0.6°C) lower than an oral temperature.

3. What is the difference between an oral and rectal thermometer?

Rectal and oral thermometers have different lines or indicators showing normal temperature, and usually differ by 1 degree: The temperature indicator in a rectal thermometer should be about 99.6°. The temperature indicator in an oral thermometer should be about 98.6°.

4. Are oral and axillary thermometers the same?

An armpit (axillary) temperature is usually 0.3°C (0.5°F) to 0.6°C (1°F) lower than an oral temperature. A forehead (temporal) scanner is usually 0.3°C (0.5°F) to 0.6°C (1°F) lower than an oral temperature.

Editor's Notes

During our rectal, oral & axillar thermometer research, we found 103 rectal, oral & axillar thermometer products and shortlisted 10 quality products. We collected and analyzed 155,100 customer reviews through our big data system to write the rectal, oral & axillar thermometers list. We found that most customers choose rectal, oral & axillar thermometers with an average price of £6.49.

The rectal, oral & axillar thermometers are available for purchase. We have researched hundreds of brands and picked the top brands of rectal, oral & axillar thermometers, including femometer, Geratherm, Citizen, A&D medical, Thermometer World.

Written by
Phoebe Cooper Avatar

In 2000, Phoebe Cooper graduated from the University of London as a Pharmacist. She practiced as a Pharmacist for the better part of 2 decades. Phoebe says she has worked in the majority of health sectors and has sufficient accumulated knowledge and experience. In her practice, Phoebe published a series of eBooks, one of which is titled "Good Health Good Living."