GPS running smartwatch with contactless payments and wrist-based heart rate
- Includes the Garmin Pay™ Ready contactless payment method - lets you make convenient payments with your watch, so you can leave your cash and cards at home
- Provides advanced running dynamics including ground contact time balance, stride length, vertical ratio and more
- Uses wrist-based heart rate to offer performance monitoring features, including evaluating your current training status
- Connected features include smart notifications, automatic uploads to Garmin Connect™ and the ability for others to track your runs with the LiveTrack feature
- Customise with free watch faces, apps and more from our Connect IQ™ store
- Battery life: up to 7 days in smartwatch mode; 14 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.
Paying made easy
Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 features the Garmin Pay Ready contactless payment method, which lets you pay for purchases with your watch. Use it just about anywhere you can tap your card to pay. A bottle of water here, a bite to eat there — just pay, and keep on moving.
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.
More ways to customise
Check out our Connect IQ™ store, where you can add personality to Forerunner 645 by downloading apps, widgets, watch faces and more. It’s easy and even better, it’s free. New apps are added every day, so you can keep tabs on when your Uber is arriving, turn on your lights at home with the SmartThings app, and even use the AccuWeather MinuteCast app to find out when the rain will start. 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
Forerunner 645 makes it easy to run without leaving important smart features behind. Once paired with your compatible smartphone you’ll be able to receive and respond to text messages and see social media updates, emails and more right on your wrist. You can even use it to find your phone. And let friends LiveTrack your runs.
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
Designed for runners, Forerunner 645 features a reliable five-button interface that lets you mark laps with a quick press. 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 metres) to be safe for swimming and showering. And with up to 7 days of battery life in smartwatch mode and 14 hours in GPS mode, Forerunner 645 is the running partner that can keep up with you.
Women's health tracking
Use the Garmin Connect™ app to track your menstrual cycle or pregnancy. Log symptoms, get exercise and nutrition education, and more. Even get details on your wrist with the Menstrual Cycle Tracking widget and Pregnancy Tracking app.
Safety and Tracking Features
Forerunner 645 provides safety and tracking features to help provide a little extra peace of mind for you and your loved ones. If anything should happen — and your watch is paired with your compatible smartphone — hold the light button down until you feel the watch vibrate 3 times. This activates the assistance feature, which discreetly sends a message with your real-time location to your preloaded emergency contacts. That way, help has an easier time finding you. This watch also has incident detection, which automatically sends a message with your real-time location to preloaded emergency contacts if an incident is detected during an outdoor walk, run or bike activity.
What You'll Love
Garmin Pay™
Training Status
General
Strap material: Silicone
Lens material: Corning® Gorilla® Glass 3
Bezel material: Stainless steel
Quick release bands: Yes (20 mm, Industry standard)
Physical size
42.5 x 42.5 x 13.5 mm
Fits wrists with a circumference of 127-204 mm
Weight: 42.2 g
Display Size
1.2" (30.4 mm) diameter
Display Resolution: 240 x 240 pixels
Colour display
Battery life
Smartwatch Mode: Up to 7 days
GPS mode: Up to 14 hours
Memory/history
200 hours of activity data
Clock features
Time/date
GPS time sync
Automatic daylight saving time
Alarm clock
Timer
Stopwatch
Sunrise/sunset times
Health & Wellness Monitoring
Wrist-based heart rate (constant, every second)
Daily Resting Heart Rate
Fitness Age: Yes (in app)
All-day Stress
Relaxation Breathing Timer
Sleep: Yes (Advanced)
Hydration: Yes (in Garmin Connect™ and optional Connect IQ™ widget)
Women's Health: Yes (in Garmin Connect™ and optional Connect IQ™ widget)
Sensors
GPS
GLONASS
Galileo
Garmin Elevate™ wrist heart rate monitor
Barometric altimeter
Compass
Gyroscope
Accelerometer
Thermometer
Daily smart features
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 forecasts
Controls smartphone music
Find my phone
Find my watch
VIRB® camera remote
Compatible with Garmin Connect™ Mobile
Smartphone compatibility: iPhone® and Android™
Activity profiles
Gym: Strength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, and Yoga
Outdoor recreation: Skiing, Snowboarding, XC Skiing, Stand up Paddleboarding, Rowing
Cycling: Biking, Indoor Biking
Swim: Pool Swimming
Safety and tracking features
LiveTrack
Activity tracking features
Step counter
Move alerts (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)
Calories Burned
Floors climbed
Distance travelled
Intensity minutes
TrueUp™
Move IQ™
Garmin Connect™ Challenges app: Yes (optional Connect IQ app)
Fitness equipment/gym
Cardio workouts
Strength workouts
Automatic rep counting
Training, planning and analysis features
Customisable screen(s)
Downloadable training plans
Course guidance
HR Zones
HR Alerts
HR Calories
% HR Max
% HRR
Recovery Time
Auto Max HR
HR Broadcast (broadcasts HR data over ANT+® to paired devices)
GPS speed and distance
Customisable activity profiles
Auto Pause®
Interval training
Advanced workouts
Auto Lap®
Manual lap
Configurable lap alerts
VO2 Max (Run)
Training Load
Training Effect
Training Effect (Anaerobic)
Customisable alerts
Audio prompts
Finish time
Virtual partner
Race an activity
Garmin Live Segments
Strava Live Segments
Touch and/or button lock
Auto scroll
Activity history on watch
Physio TrueUp
Running features
GPS-based distance, time, and pace
Running dynamics
Cadence (provides real-time number of steps per minute)
Performance condition
Run workouts
Race predictor
Foot pod capable
Outdoor recreation
Point-to-point navigation
Breadcrumb trail in real time
Back to start
TracBack®
UltraTrac mode
Elevation profile
Distance to destination
Vertical speed
Total ascent/descent
GPS coordinates
Cycling features
Courses
Race an activity
Alerts (triggers alarm when you reach goals including time, distance, heart rate, or calories)
Compatible with Varia Vision™ (head-mounted display)
Compatible with Varia™ radar (rear-facing radar)
Compatible with Varia™ lights
Speed and cadence sensor support (w/sensor)
Swimming features
Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
Drill logging (pool swim only)
Basic rest timer (up from 0) (pool swim only)
"Repeat on" rest timer (pool swim only)
Countdown start
Pool swim workouts
Kid activity tracking features
Toe-to-Toe™ Challenges app: Yes (optional Connect IQ Toe-to-Toe™ Challenges app)
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