Garmin Forerunner 645

GPS running watch with contactless payments and wrist-based heart rate

• 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 has the tools to help you put on the perfect show every time you lace up your shoes. 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.

Tune up your training

We’re making it easier to get the data you need to improve your form. Let Forerunner 645 measure crucial running metrics that you can use to analyse your performance. Biomechanical measurements, 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 will track your distance, pace, stroke count and more.

Monitor your performance

Just how effective is your current training plan? Forerunner 645 will help you monitor your training and recovery so you can better prepare for a race or training cycle. Training status is a new 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 new 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.

Share and compete

Syncing your activities to Garmin Connect is for more than just storing your data. 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.

Train your way

Your routine is anything but routine. Forerunner 645 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. Then review your past efforts on the app, or share them with family and friends for added motivation.

Love the Look

Feel free to take this watch outside in all kinds of weather. Not only is it safe for swimming and showering, its Garmin Chroma Display^™ is easy to read — even in direct sunlight — and housed under extra-durable Corning^® Gorilla^® Glass. When you want to change it up, swapping bands is fast and doesn’t require tools. The perfect everyday companion, this lightweight watch is rated to 5 ATM (50 meters) to be safe for swimming and showering. And with up to 7 days of battery life in smartwatch mode and 5 hours in GPS mode, Forerunner 645 is the running partner that can keep up with you.

General

• Time/date
• GPS Time Sync
• Automatic daylight saving time
• Alarm clock
• Timer
• Stopwatch
• Sunrise/sunset times
• Face It™ watch face creator

• GPS
• GLONASS
• Garmin Elevate™ wrist heart rate monitor
• Barometric altimeter
• Compass
• Gyroscope
• Accelerometer
• Thermometer

• Connectivity Bluetooth®, ANT+®, Wi-Fi®
• Connect IQ™ (downloadable watch faces, data fields, widgets and apps)
• Smart notifications
• Text response/reject phone call with text (Android™ only)
• Calendar
• Weather
• Controls smartphone music
• Find My Phone
• Find My Watch
• VIRB® remote
• Smartphone compatibility iPhone® and Android™
• Compatible with Garmin Connect™ Mobile
• Garmin Pay™

• Step counter
• Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)
• Auto goal (learns your activity level and assigns a daily step goal)
• Sleep monitoring (monitors total sleep and periods of movement or restful sleep)
• Calories burned
• Floors climbed
• Distance traveled
• Intensity minutes
• TrueUp™
• Move IQ™
• Fitness Age yes (in app)

• Preloaded gym activity profiles Strength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing and Yoga
• Cardio workouts
• Strength workouts
• Automatic rep counting

• GPS speed and distance
• Customisable screen(s)
• Customisable activity profiles
• Auto Pause®
• Interval training
• Advanced workouts
• Downloadable training plans
• Auto Lap®
• Manual lap
• Virtual Partner
• Configurable lap alerts
• V02 max
• Training Status (lets you see if you’re training effectively by tracking your training history and fitness level trend.)
• Training Load (your total training load for the last 7 days calculated from estimated EPOC)
• Training Effect (aerobic)
• Training Effect (anaerobic)
• Customisable alerts
• Audio prompts
• Finish time
• Race an Activity
• Course guidance
• Segments (Live, Garmin)
• Strava features (Beacon, live segments)
• LiveTrack
• Touch and/or button lock
• Auto scroll
• Activity history on watch

• HR zones
• HR alerts
• HR calories
• % HR max
• % HRR
• Recovery time
• Auto max HR
• HR Broadcast (broadcasts HR data over ANT+™ to paired devices)

• Preloaded run profiles yes (Running, Treadmill Running, Indoor Track)
• GPS-based distance, time and pace
• Running dynamics
• Cadence (provides real-time number of steps per minute)
• Performance condition (after running 6–20 minutes, compares your real-time condition to your average fitness level)
• Run workouts
• Race predictor
• Foot pod capable

• Preloaded outdoor recreation profiles Skiing, Snowboarding, XC Skiing, Stand up Paddleboarding, Rowing
• Point-to-point navigation
• Bread crumb trail in real time
• Back to start
• TracBack®
• UltraTrac mode
• Elevation profile
• Distance to destination
• Vertical speed
• Total ascent/descent
• GPS coordinates

• Preloaded cycling profiles Biking, Indoor Biking
• Courses
• Race an activity
• Time/distance alerts (triggers alarm when you reach goal)
• Compatible with Varia Vision™ (head-mounted display)
• Compatible with Varia™ radar (rear-facing radar)
• Compatible with Varia™ lights
• Speed and cadence sensor support (with sensor) yes (ANT+® and Bluetooth® Smart)

• Preloaded swim profiles Pool Swimming
• Pool swim metrics (lengths, distance, pace, stroke count/rate, calories)
• Stroke type detection (freestyle, backstroke, breaststroke, butterfly)
• Swim efficiency (SWOLF)
• Drill logging
• Pool swim workouts