With the Forerunner 645, every run is a performance. This GPS running watch includes the Garmin Pay™ contactless payment solution, so you can leave your phone and wallet at home. Fine-tune your training with wrist-based heart rate, advanced running dynamics and performance monitoring features. You can even customize your watch by downloading free watch faces, apps and more from Connect IQ™.
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GARMIN PAY |
Garmin Pay contactless payment solution1 lets you make convenient payments with your watch, so you can leave your cash and cards at home. |
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STYLISTIC DESIGN |
With the introduction of the 645, the sporty style of the Forerunner line is getting a sophisticated makeover; the metal bezel, chemically strengthened glass and interchangeable bands make it easy to wear all day, every day. |
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RUNNING DYNAMICS |
Perfect your running form with detailed running dynamics such as ground contact time balance, vertical ratio, stride length and more. |
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TRAINING STATUS |
A performance monitoring tool automatically evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking or overreaching. |
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CONNECTED FEATURES |
Includes smart notifications plus the ability to send prewritten responses to text messages, automatic uploads to Garmin Connect™ and the ability for others to track your runs with the LiveTrack feature. |
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CONNECT IQ |
Get free watch faces, widgets and apps from Connect IQ so you know when your Uber is arriving, can turn on the lights with the SmartThings app and more. |
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24/7 HR MONITORING |
Garmin Elevate™ wrist heart rate technology gives you all-day heart rate monitoring at the wrist. |
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GPS/GLONASS |
Track even better in more challenging environments than GPS alone. |
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WELLNESS MONITORING |
Features all-day stress tracking2 and relaxation-based breathing timer to help balance stress and rest. |
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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 more. |
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CUSTOM WORKOUTS |
Download or create your own custom running, cycling, cardio or strength workouts, and download them to your watch. |
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GARMIN CONNECT |
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. |
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BATTERY LIFE |
Up to 7 days in smartwatch mode and 12 hours in GPS mode. |
Unit dimensions (W x H x D): 1.7” x 1.7” x 0.5” (42.2 x 42.2 x 13.5 mm)
Unit weight: 1.5 oz (42.2 g)