Forerunner® 645 Music

Music

Up to 500 songs worth of music storage built right into your watch. It’s easy to transfer music from your computer and then queue up your favorite playlist for easy listening through Bluetooth headphones.

You can even sync your carefully crafted playlists from select music streaming services¹ to your watch for more ad-free listening.

Love the Look

Designed for runners, Forerunner 645 Music features a reliable five-button interface that lets you mark laps with a quick press.

Not only is it safe for swimming and showering, its Garmin Chroma Display™ is easy to read — even in direct sunlight — and housed under chemically strengthened glass. When you want to change it up, swapping bands is fast and doesn’t require tools with it's Quick Release Band.

Paying Made Easy

Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 Music features Garmin Pay(coming soon!) contactless payment solution,² which lets you pay for purchases with your watch.

Tune up Your Training

Forerunner 645 Music measure crucial running metrics³ that you can use to analyze your performance.

Biomechanical measurements², such as cadence, stride length, ground contact time and balance, vertical oscillation and vertical ratio, are the key to understanding your form so you can bring your best on race day.

These metrics are available with the addition of a compatible heart rate strap or the compact Running Dynamics Pod, which clips right onto your waistband.

Also, take advantage of feature sets to help with cycling and even swim training. In the pool, Forerunner 645 Music will track your distance, pace, stroke count and more.

Monitor Your Performance

Training status is a performance monitoring tool that automatically evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking or overreaching.

The anaerobic training effect metric opens a window of insight to a critical dimension of training, telling you how your training is improving your ability to push the limits.

You can even view your overall training load, which measures your exercise volume from the last 7 days and compares it to the optimal range for your fitness and recent training history.

Train Your Way

Forerunner 645 Music lets you change things up with ease, thanks to built-in activity profiles for running (indoor/outdoor), cycling (indoor/outdoor), swimming (pool), elliptical, paddle sports, strength training and many more.

Create your own custom workouts, and download for free from our Garmin Connect online fitness community.

More Ways to Customize

Check out the Connect IQ™ store, where you can add personality to Forerunner 645 Music by downloading apps, widgets, watch faces and more. It’s easy and — even better — it’s free.

With the Face It™ watch face app, choose any image from your photo library, make some tweaks, and set it as your watch’s face.

Stay Connected on the Run

Once paired with your compatible smartphone, you’ll be able to receive and even respond7 to text messages and see social media updates, emails and more right on your wrist. Find your phone, access music controls, and let friends LiveTrack your runs.

Battery Life

Forerunner 645 Music's battery life can up to 7 days in smartwatch mode; up to 5 hours in GPS mode with music.

Share and Connect

Garmin Connect™ is a thriving online community where people on the go can connect and compete by joining challenges, encourage each other’s successes and even share their triumphs via social media. Garmin Connect is free and available on the web or on your smartphone with the Garmin Connect™ Mobile app.

1. May require premium subscription with a third-party music provider
2. View current supported country, payment network and issuing bank information
3. When used with Running Dynamics Pod or HRM-Run™ or HRM-Tri™ monitor (sold separately)
4. Activity tracking accuracy
5. Battery life may vary depending on selected performance mode and usage
6. When paired with a compatible smartphone
7. Responding capability available for Android™ customers only

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Garmin is under license. Android is a registered trademark of Google Inc.

In the Box
Forerunner 645 Music
Charging cable
Documentation