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Garmin Forerunner 245 Music vs. Forerunner 645 Music - The Comparison!

Written by Lucas B | published on 15.07.2019 | no comments |
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The Garmin Forerunner is one of the most popular running watches on the market. And rightly so, because Garmin offers a very good Smartwatch for running with the Forerunner series. New are the two Garmin Forerunner 645 Music and Forerunner 245 Music. That leads directly to the questions:
  • What are the differences between Forerunner 245 and Forerunner 645?
  • Which Garmin Forerunner is better?

Comparison table

Model Garmin Forerunner 245 Music* Garmin Forerunner 645 Music*
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HR function 24/7 HR function 24/7 Yes HR function 24/7 Yes
Display available Display available Yes Display available Yes
Color display Color display Yes Color display Yes
Scratch-resistant display Scratch-resistant display Yes Scratch-resistant display Yes
Display Display Corning Gorilla Glass 3 Display Corning Gorilla Glass 3
Display size Display size 1,20 " Display size 1,20 "
Diagonal display Diagonal display 30,40 mm Diagonal display 30,40 mm
Resolution Resolution 240x240 px Resolution 240x240 px
Display, length Display, length 42,30 mm Display, length 42,50 mm
Display, width Display, width 42,30 mm Display, width 42,50 mm
Depth / thickness Depth / thickness 12,20 mm Depth / thickness 13,50 mm
Weight Weight 39 g Weight 42 g
Waterproof / Swimproof Waterproof / Swimproof Yes Waterproof / Swimproof Yes
Waterproof / Swimproof Waterproof / Swimproof 5ATM Waterproof / Swimproof 5ATM
Battery (up to) Battery (up to) 7 days Battery (up to) 7 days
Music control Music control Yes Music control Yes
Internal music storage Internal music storage 4GB Internal music storage 4GB
Spotify Spotify Yes Spotify Yes
Deezer Deezer Yes Deezer Yes
MP3 MP3 Yes MP3 Yes
Build in GPS Build in GPS Yes Build in GPS Yes
Build in NFC Build in NFC Yes Build in NFC Yes
ANT+ ANT+ Yes ANT+ Yes
Changeable bands Changeable bands Yes Changeable bands Yes
Mobile payment Mobile payment No Mobile payment Garmin Pay
Specials Specials Pulsoximeter Specials
  • UltraTrac
  • More Training Modes
  • Barometric Altimeter
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buy Garmin Forerunner 245 Music
buy Garmin Forerunner 645 Music

Differences between Garmin Forerunner 245 and 645 Music

To start with, let me say directly: Both fitness watches have a lot in common. The differences lie in the details and in the material.

Optics, display, dimensions and weight

The Forerunner 645 stands out from the crowd with its stainless steel look. On the newer 245, the watch is completely made of plastic.

In size and weight, however, the two fitness watches are the same. There is only an extremely small difference. Dimensions and weight of the watches:
  • Forerunner 245: 42.3 x 42.3 x 12.2 mm / 38.5 grams
  • Forerunner 645: 42.5 x 42.5 x 13.5 mm / 40.2 grams

However, the display is really identical on both fitness watches. Both have a Corning Gorilla Glass 3 with a diameter of 1.2 inches. The 30.4 millimeters.

In the resolution we still have no difference. Both offer 240x240 pixels.


The built-in GPS is one of the reasons why Garmin Forerunners are so popular. Of course both devices offer the possibility to use the internal GPS module.

Both Forerunner 245 and 645 also offer ANT+ and Bluetooth. This allows a pulse belt to be coupled to both watches. Especially for runners a practical thing. The measurement via pulse belt is still more accurate than via the wrist.

Battery life

There are no major differences in battery life. In normal mode both batteries last 7 days according to the manufacturer. As with any watch, the battery life decreases with higher usage. The GPS has a particularly intensive effect on the battery life.

Here, the battery life of the older Forerunner 645 drops to 5 hours. The newer Forerunner 245 can run up to 6 hours in a special mode.

This extreme battery consumption is also one reason why so many fitness trackers without internal GPS are on the market.

Waterproof & Swimming

Both Forerunner models are rated 5ATM. This makes both units waterproof up to 50 meters, unlimited in time and suitable for swimming. The Forerunner series of course also supports excellent tracking for swimming units. Thus no difference in this point.

Music with Forerunner

Both the Forerunner 645 and Forerunner 245 are available with and without music. The difference is quite clear. Without music, you simply can't hear music directly from the clock.

With the music versions, you have an internal memory for music on both devices. This allows you to store your own music directly on the clocks. Logically, you can also control and listen to your music directly from the clock.

Both models also support Spotify and Deezer streaming services. Here, too, control and playback is directly via the clock.

The GPS and the music make you completely self-sufficient from your smartphone. A big difference to other fitness trackers. But you don't have a map in your Forerunner. Just so there's no misunderstanding.

Features - Garmin Forerunner 645M vs 245M

The Model 645 has a few advantages over the Forerunner 245.
  • Garmin Pay (Contactless Payment)
  • More training modes (compared to 245)
  • Barometric altimeter

The Forerunner 245 stands out with a pulse oximeter. The differences are not big.

Which Forerunner is better?

Let's come to the crucial question. Which of the two Forerunner models is better?

The added value of the 645 is relatively low and only applies to a few features. From my point of view, it's the visual taste and the price that are decisive. As a rule, the Forerunner 245 Music* is cheaper. One reason why I recommend this model. You pay less and get an excellent GPS watch. If you have even less budget, you can also choose the version without music*.

However, if you really want Garmin Pay, you'll need to grab the Garmin Forerunner 645*. Contactless payment is only possible with the larger version. The 645 also gives you a few more tracking functions for your training sessions. Like the 245, the Forerunner 645 is also available without music*. Here too, you save a little in price.
buy Garmin Forerunner 245 Music
buy Garmin Forerunner 645 Music
Tags: Garmin The article is written by and published on .
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