Basal Thermometer Reviews & Buying Guide 2018


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
Generation Guard
Basal Thermometer – Soft
Smart Basal Thermometer by
Clinical Basal Thermometer
Digital Medical Thermometer
Basal Thermometer
Clinical Basal Body
QuickCare Smart Digital Thermometer
Digital Basal Thermometer
Basal Thermometer
Digital Oral Basal
DIHEA Basal Thermometer – Soft Image
DIHEA Basal Thermometer – Soft Tip Ovulation Thermometer – High Accuracy 1/100th Degree – Perfect Basal Temperature Monitor for Natural Family Planning
BONGMI Smart Basal Thermometer by Image
Smart Basal Thermometer by Femometer - Auto Sync BBT and Draw BBT Chart - Intelligently Track Fertility and Accurate Ovulation Prediction for Natural Family Planning Pink
iProvèn Clinical Basal Thermometer Image
Clinical Basal Thermometer - BBT-113Ai by iProvèn - Accurate 1/100th Degree, Highly Sensitive, Fertility Monitor for Family Planning and Ovulation Test Tracking - Celsius and Fahrenheit
Sejoy Digital Medical Thermometer Image
Digital Medical Thermometer, Sejoy Basal Thermometer for Oral, Rectal, Armpit Underarm, Flexible Tip, LCD Display, Waterproof Thermometer for Baby, Children, Adults,10 Probe Covers Included
Great Deal
Generation Guard Basal Thermometer Image
Generation Guard Basal Thermometer
Emay Clinical Basal Body Image
Clinical Basal Body Thermometer by EMAY (EMT-01), BBT Highly Accurate 1/100th Degree, Fertility Monitor for Ovulation Tracking (No Backlight) - 2018 EMAY New Version
Kinsa QuickCare Smart Digital Thermometer Image
Kinsa QuickCare Smart Digital Thermometer for All Ages
AnchorWell Digital Basal Thermometer Image
Digital Basal Thermometer with Backlight for Ovulation Tracking BBT (1/100th Accuracy) Bundled with 3 Pregnancy Tests by Wondfo for Natural Family Planning (NFP)
iSnow-Med Basal Thermometer Image
iSnow-Med Basal Thermometer For Ovulation with Large Memory (60 Days), 0.09F Accuracy, Store Time&Date&BBT, C/F Switchable (Pink)
Easy@Home Digital Oral Basal Image
Easy@Home Digital Oral Basal Thermometer with Large Blue Backlit LCD Display, 1/100th of a Degree High Precision and Memory Recall, Perfect for Ovulation Tracking and Natural Family Planning, EBT-100
according to our criteria
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89 %
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88 %
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87 %
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  • Sense your slightest change from your body temperature with dihea b...
  • Excellent fertility tracking: Determine your pattern of the cycle i...
  • Safe and flexible tip: a rigid tip might inattentively get the risk...
  • Professional Smart Thermometer - Femometer is a bbt thermometer wit...
  • Convenient to Use - Ergonomic design with no button and screen auto...
  • Intelligent Management - Data can be automatically synchronized to ...
  • Highly accurate 1/100 degree reading Basal Thermometer for ovulatio...
  • Please notice: This is not a standard medical contact thermometer I...
  • This ovulation thermometer is a so called actual body temperature t...
  • Reliable oral rectal fever thermometer for adults and babies: sejoy...
  • Safter flexible tip: Thanks for its soft and flexible tip design se...
  • Led display
  • Track with confidence - This digital basal thermometer has clinical...
  • Accurate fertility tracking is possible using Generation Guard's di...
  • Enjoy the peace OF mind that fda and European CE approval brings to...
  • Highly accurate 1/100th degree reading bbt Thermometer specially de...
  • It is for actual temperature with nearly the same accuracy of a mer...
  • Perfect companion for women who are trying to conceive (ttc) want t...
  • Kinsa's latest digital Bluetooth Thermometer designed for use with ...
  • Fast accurate and reliable readout in 8 seconds or less
  • Pediatrician-recommended and fda cleared for accuracy as a rectal b...
  • Track ovulation: Tracking Fertility is proven to decrease the lengt...
  • High value bonuses: Includes 3 Wondfo pregnancy test strips
  • Premium function and design: Flexible tip waterproof easy-to-read l...
  • Specially designed for Basal Body Temperature great for monitoring ...
  • Clinical High Measurement Accuracy (0.05 0.09)
  • Soft blue backlight large lcd monitor easy to read in the dark
  • Monitor your ovulation cycle with Easy@Home The newly launched ebt-...
  • Clinical high accuracy (0.05 0.09): Measures Basal Body Temperature...
  • Large blue screen with backlit: Large display with backlit for easy...
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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 Thermometers Would You Buy Online? (July 2018)

  • 65 % (13 votes) Clinical Basal Thermometer - BBT-113Ai by Iprov...
  • 25 % (5 votes) Smart Basal Thermometer by Femometer - Auto Syn...
  • 10 % (2 votes) Basal Body Thermometer BBT-113Ai WG (TTC) - Hig...
  • 0 % (0 votes) Digital Infrared Baby Forehead Thermometer with...
  • 0 % (0 votes) Basal Thermometer by Emay, Clinical BBT Accurat...
  • 0 % (0 votes) Digital Basal Thermometer with Backlight for Ov...
  • 0 % (0 votes) Multi-Function Digital Basal Thermometer to Mea...
  • 0 % (0 votes) Premom Ovulation Predictor App Integrated Easy@...

20 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 – Soft from DIHEA

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 2018

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 2018.

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