Name: Keurig K40
Brand: Keurig

Overall Rating

Coffee Quality (40%)

Design & Features (20%)

Durability (20%)

Ease of Use (10%)

Brand Reputation (10%)

The Bottom Line

The K40 is one of Keurig's most iconic brewers. It's simple and easy to operate with a solid 48 oz reservoir, but it has just a 10 oz max brew size and no special features. Now discontinued, check out the K-Classic instead.

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Key Features of the Keurig K40

Key Features of Keurig K40

Product Line/System: Keurig 1.0 Elite
K-Cup Compatibility: Unlicensed K-Cups, Keurig 2.0 licensed K-Cups, and ground coffee with the My K-Cup
Brew Sizes: 6 oz, 8 oz, 10 oz
Water Reservoir: 48 oz
Water Filter: Compatible but not included
Display: Button controls for Brew Size and Power; LED indicators for Add Water, Descale, Heating, Auto-Off and Power
Temp Control: No
Strength Control: No
Dimensions: 9.8"W x 13.0"D x 13.3"H
Weight: 12.0 lbs
Other Features: Quiet Brew Technology, Auto-On/Off, removable drip tray, comes with K-Cup variety pack

Keurig K40 Overview

The K40 is one of Keurig's flagship brewers and was introduced as an upgrade to the B40, though the two models have the exact same specs.

Currently discontinued, the K40 has been replaced by the K-Classic, which offers many of the same features:

48 oz reservoir
No Strength Control or Temp Control
Auto-On/Off functionality and removable drip tray
No pod-scanning system (found on Keurig 2.0 brewers) so it's compatible with all types of K-Cups

The only differences between the K40 and K-Classic are the K-Classic's slightly expanded brew sizes (6, 8, and 10 oz) plus its upgraded brewing system that ensures you're brewing with Keurig's latest and greatest technology for hotter, stronger cups.

You may also see 4 model numbers that look identical: K40, K45, K50, and K55.

What's the difference?

The K40 and K45 were originally released as Keurig's K-Elite brewers. Both came with the K-Cup variety pack, but the K45 also came with the water filter starter kit.

In 2015, Keurig rebranded the K40 and K45 K-Elite brewers as the K50 and K55 K-Classic brewers.

Pros

No pod-scanning technology so brews both licensed and unlicensed K-Cup pods
The iconic brewer that put Keurig on the map
Foolproof to use
Comes with K-Cup variety pack

Cons

Discontinued model
Only 2 brew sizes (8 oz, 10 oz)
No Brew Strength, Temp Control, or other features
No water filter starter kit or reusable My K-Cup

Is the Keurig K40 for you?

Are Keurig K40 for you?

The discontinued K40 is still worth purchasing if you can get a good deal. It doesn't have any outdated tech that limits its usability and is still a quality model if you don't mind losing the 6 oz brew size.

If you like the K40 but want to add a water filter starter kit, take a look at the K45.

However, we really do recommend going with the K-Classic, which is currently in production, supported by Keurig, and has all of the features you'd find on K40-K55 brewers.

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More Keurig Reviews From The Coffee Maven

Keurig K500

Overall Rating: 88

The crown jewel of the Keurig 2.0 pod-scanning system, feature-rich K500 series brewers offer 11 brew sizes (up to 30 oz) and massive 80 oz reservoir. Now discontinued, we recommend the Keurig K-Duo Plus instead.

Learn More →

Keurig K-Slim

Overall Rating: 86

Keurig's largest compact brewer, the 4.8" K-Slim keeps the narrow width of the K-Mini and K-Mini Plus but offers a relatively massive 46 oz water reservoir and a removable drip tray accommodating mugs up to 7" tall.

Learn More →

Keurig B145 OfficePRO

Overall Rating: 83

Keurig's most basic office model, the UL Commercial listed B145 has an underwhelming 48 oz reservoir and max 10 oz brew size, but the Drain Brewer function is handy and its sturdy build makes it great for heavy use.

Learn More →

About The Coffee Maven

Bryan De Luca

I'm Bryan but most people know me as The Coffee Maven. I grew up outside Boston, Massachusetts and received my Bachelor's degree in Biochemistry from Providence College. My first introduction to coffee was during my college days, when I used it as a source of caffeine to fuel late-night study sessions, but soon I became obsessed with the chemistry of coffee. How did changes to water temperature or contact time affect its taste? Why do beans from Africa taste fruity while beans from Indonesia taste spicy? I launched The Coffee Maven in February 2017 to explore these questions and help others brew their perfect cup. Welcome to my site, and thanks for reading!

Keurig K40 Review

Key Features of the Keurig K40

Key Features of Keurig K40

Keurig K40 Overview

Is the Keurig K40 for you?

Are Keurig K40 for you?

Keurig K40 Review: An In-Depth Look

Check out the Keurig K40!

Check out Keurig K40!