Thermapen® ONE by ThermoWorks

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ONE. Second. Readings.
Thermapen ONE almost moves at the speed of thought...allowing you to focus exclusively on the quality of your work.

More Accurate
With an improved accuracy spec of ± 0.5°F (± 0.3°C), you’ll know your lightning fast Thermapen ONE readings are always accurate, as well.

Brighter Backlight
The automatic backlight is brighter and the light sensor is more sensitive to changes in ambient lighting conditions.

5-Year Warranty
The newly designed rugged, waterproof case features a 5-year warranty against defects.

With a newly designed battery compartment for easier access to the user settings and all the amazing features you love—auto-rotating display, motion-sensing sleep and wake mode, waterproof to IP67, NIST-traceable calibration certificate—you'll need to get ONE for yourself to understand the power of sub-second performance.

5-year Warranty NSF Certified Made in England Polygiene Biomaster

From the Blog

Backyard Cookouts—From Steaks to Chicken to Brats, You Need Fast Temps

Planning a cookout with friends and family? You need to be temping those steaks, brats and burgers! Avoid the dry-meat-cookout blues with the power of thermometry...

Spare Rib Temps: Barrel-cooked Glory

Outstanding taste and texture in spare ribs are not hard to master if you understand the basic principles of time and temperature during your cook.

Homemade Ice Cream: Temperatures for Smooth and Creamy Results

If you want a smooth, creamy ice cream—as opposed to a coarse, icy one—you need to take care with the ingredients and the temperatures.

Digital Instant-Read Thermometer: Winner

"Our former favorite instant-read thermometer, the ThermoWorks Thermapen Mk4, has been discontinued. We tested its replacement, the ThermoWorks Thermapen ONE, and found that we liked it even better than the old model. We highly recommend the ONE; it is our new winner."
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ThermoWorks Thermapen ONE Review

"We tend to get picky with the reviews here and can generally find something that, at least in our opinion, could be improved. We’re hard-pressed to do that for the Thermapen ONE; there’s simply nothing, from a functionality perspective, that we think could be improved."
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Thermapen One Review | Best BBQ thermometer

"This is the bestest, baddest thermometer you will ever get. It’s the best example of “buy once, cry once” in my entire BBQ journey. This may be the best thing I’ve ever bought…and the thing I’m most happy with...."
Watch the Review

"ThermoWorks Thermapen ONE is honestly the best instant read thermometer we've tested to date. So, if you like to have the best of the best, look no further and order ONE for yourself...."
Read the Review

ThermoWorks Thermapen ONE Review

Thermoworks Thermapen ONE is the newest addition to an excellent line-up of their instant-read thermometers. Its unmatched speed, accuracy, and feature set have raised the bar for cooking accessories.
Read the Review

Specifications
Range	-58.0 to 572.0°F (-49.9 to 299.9°C)
Accuracy	±0.5°F (±0.3°C) from -4 to 248°F (-20 to 120°C) otherwise ±1.8°F (±1.0°C)
Resolution	Factory set to 1° (user reconfigurable to 0.1°)
Response Time	Full reading in 1 second (0.2 seconds time constant)*
Probe	4.3 L inches x 0.12" dia. (reduces to 0.06" dia.), High Performance Type K Thermocouple
Display	1 H x 1.54 W inches (25 H x 39 W mm) LCD, rotates 360°, Intelligent Backlight
Sleep Mode	10 to 180 seconds, user selectable (user reconfigurable to disable)
Water Resistance	IP67
Operating Range	–4 to 122°F (–20 to 50°C), max ambient limits of Thermapen body
Battery	1.5 volt AAA, 2,000 hours typical (without backlight)
Dimensions	6.1 W x 1.7 H x 0.74 D inches (156 W x 48 H x 19 D mm)
Weight	0.25 lbs (115g)
Warranty	5 years
Certificate	Includes NIST-traceable calibration certificate

* Response time defined as five time constants for 99.3% of actual temperature.

With full readings in just one second, Thermapen ONE is in a category by itself when it comes to “instant-read” thermometers. Thermapen ONE achieves a new standard of accuracy, as well—now accurate to ±0.5°F (±0.3°C)—so you know your readings are correct. To achieve this level of performance without resorting to algorithms or mathematical adjustments, Thermapen ONE truly pushes the boundaries of sensor and electronic measurement engineering.

New: Unparalleled speed with full temperature readings in less than one second
New: Industry leading accuracy to half a degree: ± 0.5°F (±0.3°C)
New: Brighter intelligent backlight display automatically illuminates in low-light and when the sensor window is covered
New: Easy access battery housing uses one common AAA battery for a 2,000-hour battery life
New: Five-year warranty
Motion-Sensing Sleep and Wake Mode: intuitively turns on and off—or when picked up or in use and off when set down to save battery
Patented 360° auto-rotating display uses accelerometer technology to intuitively turn right-side up
Shockproof, dustproof, and waterproof with an IP67 rating for water-tight seals
Foldaway design protects probe when not in use
Polygiene Biomaster Antimicrobial Silver Ion Technology reduces microbial growth
Hand washable
Display temperatures in °F or °C, 1° or 0.1° resolution
Each Thermapen ONE includes a NIST-traceable calibration certificate verifying accuracy to national standards

The new Thermapen ONE includes professional level features at an affordable price, including an auto-rotating display, which uses accelerometer technology to detect screen motion/orientation for use in either hand (similar to smartphone orientation); a battery-saving sleep/wake mode; fully waterproof IP67 design; new brighter automatic backlight for use at night or in low light; 2,000-hour battery life using one AAA battery with new easy-access battery housing; and included NIST-traceable calibration certificate for increased confidence in its performance. Thermapen ONE lets everyone “seek perfection” when cooking at home, in the BBQ pit, or for daily use in professional restaurants, to measuring critical temperatures in labs, food processing plants, grocery stores, and more.

Downloads

Download Thermapen ONE Operating Instructions

Download Thermapen ONE Calibration Trim Instructions

Download Thermapen ONE Product Info Sheet

Changing the Battery

Installing a Silicone Boot

1,626 Ratings

4.9out of 5 stars

1,626 Ratings

Rated 5 stars by 92% of reviewers

Rated 4 stars by 4% of reviewers

Rated 3 stars by 2% of reviewers

Rated 2 stars by 0% of reviewers

Rated 1 star by 1% of reviewers

Rated 5 out of 5

Mar 28, 2025

Best thermometer on the market.

So accurate. Love it. Makes such a difference for sourdough bread.

ANGELLA G

Rated 5 out of 5

Mar 27, 2025

5 Star products and service

I have Thermopen and ChefAlarm and both perform very well until I recently had a problem with the ChefAlarm. I reached out for help and the company personnel (Dan) made it right for me. I really appreciate good customer care and the company behind them.

JUDY K

Rated 5 out of 5

Mar 24, 2025

Thermapen One

I use it for sourdough bread baking and I have to keep track of my dough temperature while it is fermenting. So fast at providing a temperature reading - I love it!!

LINDA Y

Rated 5 out of 5

Mar 23, 2025

Fast and accurate

HARVEY F

Rated 5 out of 5

Mar 23, 2025

Worked great, wort the money..A++++

JOHN B

Rated 5 out of 5

Mar 23, 2025

Great Products!

Love my Thermoworks products. So much so that I keep purchasing them for my friends and family! Have the MK4, one, RFX, and signals products. Also love the silicone utensils!

Heath R

Rated 5 out of 5

Mar 22, 2025

5 stars

Great product and great customer service!

Daniel A

Rated 5 out of 5

Mar 21, 2025

It's fast!

Wow! This thing really works as well as they claim! Very impressed and happy with my purchase.
Much faster than the less expensive thermometers I own.

RANDY B

Rated 5 out of 5

Mar 20, 2025

Accurate and fast

JAKE B

Rated 5 out of 5

Mar 20, 2025

Awesome

Worked professionally years ago when the analog Taylor was the standard. Have been using a Dot for sometime, finally broke down and paid for THE ONE, holy *#@!, should have done it years ago. Absolutely amazing performance.

STEVEN I

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Why did you choose this?

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That Sourdough Gal

Barbara RMar 29, 2025

Recommended by sourdough bakers, including Msrizio, my favorite!

LILLIAN NMar 29, 2025

Need it

THOMAS SMar 29, 2025

J Kenji Lopez-Alt

Whitney SMar 29, 2025

Thermapen® ONE

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From the Blog

Digital Instant-Read Thermometer: Winner

ThermoWorks Thermapen ONE Review

Thermapen One Review | Best BBQ thermometer

ThermoWorks Thermapen ONE Review

Downloads

Thermapen® ONE

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