Basal Thermometer Reviews & Buying Guide 2019


Hello, I'm Gregor and I put this site together. At first, you'll find an overview of recommended basal thermometers, followed by a public poll and a general buying guide on basal thermometer. Further down on this page, we do link to other well-written articles and reviews about basal thermometers. At last, you'll be able to weight in your own opinion in the comments section.

If you choose to buy an item that I've chosen indepenently and recommended it here, I may earn commissions to support my efforts. For you, the price of the product will not change, I'm just saying this to be completely open with you.

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The 10 Best Basal Thermometers of Our Choice

Quick comparison in an overall view
Purple Safety
Basal Thermometer
Basal Thermometer
Basal Digital Thermometer
Basal Body Thermometer
Basal Thermometer
iOS & Android
Digital Basal Thermometer
Digital Medical Thermometer,Basal
Digital Basal Thermometer
Best Digital Medical
Baby and Adult Termometro
tility Basal Thermometer
POPKA Basal Thermometer Image
POPKA Basal Thermometer - Soft Tip Thermometer for Ovulation - High Accuracy 1/100th Degree Digital Medical Thermometer - Waterproof and Reliable Fertility Thermometer for Natural Family Planning
KORIER Basal Thermometer Image
KORIER Basal Thermometer - Digital Thermometer for Tracking Ovulation - Highly Accurate 1/100th Degree Fertility Thermometer - Get Pregnant Naturally
Great Deal
VEDIK Basal Digital Thermometer Image
VEDIK Basal Digital Thermometer - Fast Reading, Auto Turn Off, 1/100th Degree High Precision and Memory Recall Fertility Basal Thermometer - Perfect Basal Thermometer for Ovulation Tracking
iProvèn Basal Body Thermometer Image
Basal Body Thermometer BBT-113Ai - Temperature Tracking When Trying to Conceive (TTC) - Natural Family Planning - Accurate to 1/100th Degree - Ovulation and Period Monitor
femometer Basal Thermometer Image
Basal Thermometer for Ovulation, Intelligent Quiet BBT Thermometer with Display for Nature Family Planning, Fertility Monitor and Period Tracker with APP (iOS & Android) from Femometer Vinca II
Purple Safety Digital Basal Thermometer Image
Purple Safety Digital Basal Thermometer for Fertility Monitoring - 30 Seconds Reading, Flexible, Accurate Ovulation Tracking Thermometer for Natural Family Planning- Pink
JUNING Digital Medical Thermometer,Basal Image
JUNING Digital Medical Thermometer,Basal Body Thermometer,Accurate and Fast Readings proven thermometer,Oral and Axillary Thermometer for Baby and Adults with Fever Indicator
Easy@Home Digital Basal Thermometer Image
Easy@Home Digital Basal Thermometer with Blue Backlight LCD Display, 1/100th Degree High Precision and Memory Recall, FSA Eligible,For Ovulation Tracking and Natural Family Planning, Upgraded EBT-100B
iProvèn Best Digital Medical Image
Best Digital Medical Thermometer (Baby and Adult Termometro), Accurate and Fast Readings - Oral and Rectal Thermometer for Children Babies - DT-R1221AWG with Fever Indicator - 2019 High Quality
iProvèn tility Basal Thermometer Image
Fertility Basal Thermometer for Ovulation - iProven BBT-271B - 1/100th Accuracy - Trying to Conceive The Natural Way - Monitor Your Waking Temperature - Ovulation Tracking and Prediction
according to our criteria
98 %
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98 %
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93 %
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90 %
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86 %
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86 %
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86 %
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85 %
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84 %
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82 %
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  • Precision measuring: The Digital Basal Thermometer for tracking ovu...
  • Safe and flexible tip: If you use the stiff tip you are likely to g...
  • Reliable fertility tracking: This clinical basal thermometer has un...
  • Precision measuring: The Basal Body Thermometer for ovulation track...
  • Safe and flexible tip: With the flexible and soft tip this Digital ...
  • Reliable device: Undergoing the medical testing and conformity cali...
  • Accuracy measuring: The Medical Digital Thermometer has a precision...
  • Safe and flexible tip: This body temperature thermometer is a wise ...
  • Reliable fertility tracking: This clinical basal thermometer has un...
  • Your companion TO start a new beginning - This is not a regular the...
  • Peace OF mind - This device will give you the insights you're looki...
  • Slow but sure - When you want to track your Basal Body Temperature ...
  • Automate Data Recording ovulation No manual work needed
  • Accurate Fast Measurement - The measurement precision is up to 0.0...
  • So Easy to Use - There is no button switch but an lcd screen for y...
  • Reliable and durable: Our bbt monitor is made of sturdy waterproof ...
  • Easy TO clean and waterproof: This waterproof thermometer can be di...
  • Soft and flexible tip: The soft flexible thermometer tip is designe...
  • Fast Reading: Fast oral temperature reads in approximately 30 secon...
  • Easy to Use: Very sensitive unit; easily check for a fever in Fahre...
  • Safety and Healthy: Waterproof and flexible soft tip fits naturally...
  • Monitor your ovulation cycle: helps you measure your basal temperat...
  • Clinical high accuracy (0.05 0.09): Measures Basal Body Temperature...
  • Large blue screen with backlit: easy to read in the dark Recall 30 ...
  • Optimized algorithm - The dt-r1221a-us-wg has an optimized algorith...
  • Professional quality for home use - The best professional quality d...
  • Hygienic and easy TO clean - The waterproof tip allows you to clean...
  • The help ttc moms need - Easy instructions in the manual useful inf...
  • Detect your ovulation pattern - Your cycle has a way of its own Thi...
  • The way TO plan your family naturally - Whether you're trying for a...
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Results of the Straw Poll: Popular Basal Thermometers

Every month, we analyze which products our readers like the most:

Which Basal Thermometer Would You Buy Online? (September 2019)

  • 0 % (0 votes) POPKA Basal Thermometer - Soft Tip Thermometer ...
  • 0 % (0 votes) KORIER Basal Thermometer - Digital Thermometer ...
  • 0 % (0 votes) VEDIK Basal Digital Thermometer - Fast Reading,...
  • 0 % (0 votes) Basal Body Thermometer BBT-113Ai - Temperature ...
  • 0 % (0 votes) Basal Thermometer for Ovulation, Intelligent Qu...
  • 0 % (0 votes) Purple Safety Digital Basal Thermometer for Fer...
  • 0 % (0 votes) JUNING Digital Medical Thermometer,Basal Body T...
  • 0 % (0 votes) Easy@Home Digital Basal Thermometer with Blue B...

0 total votes.

If you also want to vote on the best basal thermometer, click here to view the poll.

Basal Thermometer Buying Guide

Basal Thermometer Image
Picture: Basal Thermometer from POPKA

When using a thermometer to determine if you have a fever, all you generally need is a thermometer that can give you a reading in degrees, since a fever will usually raise your body temperature at least a full degree or higher. basal temperatures, however, are best measured in tenths or hundredths of degrees for best accuracy.

Body temperatures can actually fluctuate mildly throughout the day, depending on a number of different factors. The types of food and beverages you consume can have an impact on body temperature, as can exercise and even the time of day it is. At night, however, your body cools during sleep and tends to remain stable throughout the night. Your most stable and predictable body temperature generally occurs when you first wake up in the morning. This is what is referred to as your Basal Body Temperature or BBT.

When a woman is ovulating, however, this resting or basal temperature will raise as much as a full degree. This is what basal thermometers are designed to measure. There are two different types of basal thermometers, however, with a number of different features. Here is a buying guide to help you find the right thermometer for you.

Why types of basal thermometers are available?

There are two types of basal thermometers, liquid filled glass thermometers and digital thermometers. Liquid filled glass thermometers used to be filled with mercury but have largely been phased out in favor of alcohol filled thermometers because of the toxicity of mercury. While there is no danger as long as the mercury stays inside the thermometer, if the glass were to break, mercury is highly toxic. While you probably can't even buy a mercury thermometer these days, they are still floating around so you might want to purchase one rather than inheriting one from an older family member.

The other type of basal thermometer is a digital thermometer. Glass thermometers can be harder to use, but offer greater accuracy. Digital thermometers have a number of features that make them far more convenient, but also have some drawbacks. One thing to keep in mind is that you are looking for changes in your normal temperature. This means there are two kinds of accuracy a thermometer can offer: absolute accuracy and relative accuracy. While a digital thermometer might be off by a few tenths of a degree, as long as it is uniformly off the same amount each day, you can still get an accurate reporting of any changes. While a glass thermometer may give you a more absolute accurate reading, relative accuracy is what is most important in determining ovulation.

Which type is better?

Digital thermometers tend to be less expensive than glass thermometers and have a number of features that make them preferable to glass. A digital readout is generally much easier to read than a glass thermometer and displays are often backlit making them easier to read in a dimly lit room. You can also store the temperature for recording later in the day. Glass thermometers also need to be shaken the night before. They need to be shaken before they are used, but since any movement can disrupt your basal temperature, if you wait to shake it until the mooring, you may preclude yourself from getting an accurate reading.

One drawback to digital thermometers, however, is that they can often quit suddenly and without warning. Keep in mind that it can take up to 90 days to establish a baseline, or a clear indication of what a normal BBT is for you. There are always going to be a few mornings where you either forget to take your temperature or take it after you have already moved, which can already raise your temperature by a few tenths of a degree.

Remember that digital thermometers are not quite as accurate as glass thermometers and can already be off by a few tenths of a degree. This means that if your digital thermometer breaks and you have to get a new one, you may have to start from scratch in determining what your normal basal temperature is with a new thermometer. It's only when you know for sure what your normal baseline is that you can confidently trust any aberrations. So, while there are definitely a number of perks to using a digital thermometer, there can definitely be some drawbacks as well.

In addition, as the batteries begin to wear down, it can also affect the thermometer's ability to deliver an accurate reading. Keep in mind that you are looking for a temperature variation as small as one half to one degree, so accurate readings are highly important. In addition, they use batteries which need to be changed regularly, which can also be a drawback for some.

What are some features of digital thermometers?

Digital thermometers come with a number of features that can make them preferable to glass even in spite of the drawbacks. In addition to the lower cost and easy-to-read display, some models offer a number of other features as well. Here are some common added features of digital basal thermometers:

Tells you exactly when you are ovulating: While the goal of taking your basal temperature is to determine when you are ovulating, there can still be some guesswork involved or it may not be exactly clear. Some thermometers, like the iBasal Digital Thermometer, allow you to input additional information and will tell you specifically when you are ovulating, removing any doubt.

FDA Approved: Many basal thermometers are FDA approved, which means you can trust their reliability and accuracy. When such an important issue as fertility is at stake, you want the confidence of knowing that a product you are using has been tested and approved by a regulatory agency.

Beeps when ready: Since you take your basal temperature as soon as you wake, you may still be sleepy and groggy and may fall asleep with the thermometer still in your mouth. In addition, it can sometimes be hard to know exactly when a thermometer has had enough time to get an accurate reading. A digital thermometer when beep when it has an accurate reading so you know you are done.

Stores readings: Sometimes you may want to sleep a bit more after taking your temperature rather than turning on a light to record a reading. With a digital thermometer you can simply remove the thermometer and go back to sleep knowing that your reading will be recorded for later. Some thermometers will even store several days of readings just in case you forget to record one.

Fast readings: While most digital thermometers can take up to a full minute to give you an accurate reading - and glass thermometers can take up to 5 minutes - devices like the SANPU Digital Basal Thermometer can give you an accurate reading in as little as 10 seconds. The caveat to this, however, is that it may not give you the most accurate reading over time.


When it comes to choosing the right thermometer for you, there is no right or wrong. There are advantages and disadvantages to all types of thermometers. Some digital thermometers can give you a great deal more information but may also be hard to program, read or use. There are a number of thermometers available that are simpler and easier to use but also don't provide as much information. Glass thermometers will unquestionably give you the most accurate readings, but can also be the most difficult to use. Here is a summation of the pros and cons of each:



  • Most accurate
  • No batteries
  • Long lasting


  • Takes longer to get a reading
  • Has to be shaken down the night before
  • Readings must be recorded immediately
  • Sometimes difficult to read



  • Easier to read
  • Wide number of features
  • Will save temperature for recording later


  • Can quit without warning
  • Not as accurate
  • Need batteries
  • Can be complicated to use

Your Opinion Matters!


Basal Thermometer Reviews & Additional Articles

New: Our editorial list of additional articles. We decided to gather informartion all around the internet and present you a list of helpful, external links to interesting reads about the best basal thermometers and their reviews and guides.

Reviews (There are various Bluetooth-enabled thermometers that take your temperature by ear, Measuring what's called your "basal body temperature" gives you more precise data . A Spoiler-free Review of Solo: A Star Wars Story. ...
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Buying Guide No matter which basal thermometer you choose to purchase from, you can rest assured that you are purchasing and accurate tool  ...
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Buying Guide If you are trying to conceive, you can surely buy a basal thermometer that can assist you to know the exact date of your ovulation to ensure your  ...
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Best Have you been trying to get pregnant but in vain? If so then basal body thermometer is one of the best tools to rely on. Tracking basal body  ibasal digital thermometerwink by kindarabasal body thermometer amazonisnow med thermometer instructionseudemon digital basal thermometergeneration guard basal thermometerPeople also search for ...
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The Basal Thermometers of Our Choice At a Glance

You're not convinced by the previous writings about basal thermometers? Of course you can just choose by visual impression, that's why we present you all our chosen products at a single glance. A click on any image is enough to open an external link to the best offer we could find.

Tips from YouTube about Basal Thermometer

Today - What I Look For In a BBT Thermometer | Choosing Your First One

I get asked all the time, "What thermometer should I get to start charting?" Well, here's how I'd go about choosing that first thermometer. Enjoy! Thermometers ...

Disclaimer: This video is not from us, but we found it relevant enough to show it here.


Conclusion for this Basal Thermometer Buying Guide in September 2019

Finally, we want to present you our rating criteria for our basal thermometer comparison, so you can better understand and comprehend our recommendations and the rating process itself. Furthermore, we still ask you to keep your eyes open for short term deals in order to make some great bargains with basal thermometer in 2019.

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