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Garmin Forerunner 645 Music

RRP £399.99save £70.00 £329.99 inc. VAT
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GPS running watch with music and Garmin Pay ready

  • Easily download up to 500 songs to your watch, and connect with Bluetooth® headphones (sold separately) for phone-free listening
  • Syncs music from Deezer (coming soon) for offline listening7
  • Includes the Garmin Pay Ready contactless payment method1lets you make convenient payments with your watch, so you can leave your cash and cards at home
  • Provides advanced running dynamics2 including ground contact time balance, stride length, vertical ratio and more
  • Uses wrist-based heart rate3 to offer performance monitoring features, including evaluating your current training status
  • Battery life5: up to 7 days in smartwatch mode; 5 hours in GPS mode

Running is more than just exercise, it’s a performance. And Forerunner 645 Music has the tools to help you put on the perfect show every time you lace up your shoes. It features on-device music storage, so you can run with your favourite tunes. And contactless payments let you buy what you need without missing a beat. With all that plus advanced running dynamics and performance monitoring tools, this GPS running watch is the instrument you need perfect the act.


BUILT-IN MUSIC - With the 645 Music, easily download up to 500 songs to your watch, and connect with Bluetooth® headphones6 (sold separately) for phone-free listening.

GARMIN PAY READY - Includes Garmin Pay Ready contactless payment method1 lets you make convenient payments with your watch, so you can leave your cash and cards at home.

RUNNING DYNAMICS3 - Perfect your running form with detailed running dynamics3 like ground contact time balance, vertical ratio, stride length, running power7 and more.

TRAINING STATUS - 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.

CONNECTED - FEATURES4 - Includes smart notifications plus the ability to send prewritten responses to text messages4, automatic uploads to Garmin Connect and the ability for others to track your runs with the LiveTrack feature.

CONNECT IQ - Get free watch faces, widgets and apps from Connect IQ so you can know when your Uber is arriving, follow your TrainingPeaks workout, find out your running power and more.

24/7 HR MONITORING2 Garmin Elevate™ wrist heart rate technology gives you all-day heart rate monitoring at the wrist2.

GPS+GLONASS - Track even better in more challenging environments than GPS alone.

WELLNESS -MONITORING - Features all-day stress tracking and relaxation-based breathing timer to help balance stress and rest.

BUILT-IN SPORTS - The running sports are just the beginning, because there is also built-in support for cycling, pool swimming, row, elliptical, cardio and lots more.

CUSTOM WORKOUTS - Download or create your own custom running, cycling, cardio or strength workouts and download them to your watch.

GARMIN CONNECT™ MOBILE APP - Garmin Connect is an online community where people can connect and compete by joining challenges, encourage each other’s successes and share triumphs via social media. Garmin Connect is free and available on your smartphone with the Garmin Connect Mobile app.

BATTERY LIFE5 - Up to 7 days in smartwatch mode and 12 hours in GPS mode. 645 Music gets up to 7 days in smartwatch mode and 5 hours in GPS mode with music.



  • Forerunner 645 Music
  • Charging cable
  • Documentation

1 Available for supported cards from participating banks; contact your bank for more information. View current supported country, payment network and issuing bank information at   Garmin.com/GarminPay.

2 See Garmin.com/ataccuracy

3 When used with running pod, HRM-Run™ or HRM-Tri™ monitor

4 When paired with a compatible smartphone; see Garmin.com/BLE.

5 Battery life may vary depending on selected modes of operation

6 See garmin.com/wirelessheadphones

7 With Garmin’s Connect IQ Running Power data field