Garmin Forerunner 645 Range

$549.00 $525.00

Forerunner 645
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Description

GPS Running Watch with Contactless Payments and Wrist-based Heart Rate

  • Garmin Pay™ contactless payment solution¹ lets 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
  • Connected features4 include smart notifications, automatic uploads to Garmin Connect™ and the ability for others to track your runs with the LiveTrack feature
  • Customize with free watch faces, apps and more from our Connect IQ™ store
  • Battery life5: up to 7 days in smartwatch mode; 14 hours in GPS mode

At a Glance

Running is more than just exercise — it’s a performance. And Forerunner 645 has the tools to help you put on an outstanding show every time you lace up your shoes. Featuring contactless payments that let you buy what you need while on the go — plus advanced running dynamics and performance monitoring tools — this GPS running watch is the instrument you need to refine the performance.

Paying Made Easy

Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 features Garmin Pay contactless payment solution¹, 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.

garmin pay

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 analyze your performance. Biomechanical measurements², such as cadencestride lengthground contact time and balancevertical 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.

Training

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 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.

More Ways to Customize

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.

Connect IQ

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 even respond6 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.

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™ Mobileapp.

Connect IQ

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.

Training

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 chemically strengthened glass. When you want to change it up, swapping bands is fast and doesn’t require tools. 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.

¹View current supported country, payment network and issuing bank information
²When used with Running Dynamics Pod or HRM-Run™ or HRM-Tri™ monitor (sold separately)
³Activity tracking accuracy
4When paired with a compatible smartphone
5Battery life may vary depending on selected performance mode and usage
6Responding 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.

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Physical & Performance

Display size 1.2″ (30.4 mm) diameter
Display resolution 240 x 240 pixels
GPS Yes
Weight 41.8 g
Display type sunlight-visible, transflective memory-in-pixel (MIP)
Battery life Smartwatch Mode: Up to 7 days
GPS mode: Up to 14 hours

Maps & Navigation

Memory/History 200 hours of activity data

Features

3-axis compass with HSI (horizontal situation indicator) No
Touch and/or button lock Yes
GPS coordinates Yes
Audio prompts Yes
Sleep monitoring (monitors total sleep and periods of movement or restful sleep) Yes
Auto CourseView updates No
Downloadable training plans Yes
Measures shot distance (calculates exact yardage for shots from anywhere on course) No
Heart rate (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) No
Compatible with Varia™ radar (rear-facing radar) Yes
SwingTempo No
Task timers (2, 5, 10, 15, 20 and 30 minutes) No
Plays and controls watch music No
APNEA mode No
Pool swim workouts Yes
Multi-gas mode No
Race an Activity Yes
Hot keys No
Single-gas mode No
Activity history on watch Yes
Auto max HR Yes
Compatible with Varia Vision™ (head-mounted display) Yes
HR alerts Yes
Foot pod capable Yes
Compatible with Vector™ (power meter) No
Training Effect (anaerobic) Yes
Vertical speed Yes
Customizable data pages Yes
Race an activity Yes
Finish time Yes
Elevation profile Yes
Configurable lap alerts Yes
Automatic sync (automatically transfers data to Garmin Connect) No
PlaysLike distance No
Virtual Partner Yes
V02 max Yes
Reminder alerts No
Customizable alerts Yes
NEXRAD on moving map No
Back to start Yes
Training Load (your total training load for the last 7 days calculated from estimated EPOC) Yes
Altimeter with adjustable baro setting No
Physical size 42.5 x 42.5 x 13.5 mm

Fits wrists with a circumference of 127-204 mm

Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it) Yes
Compatible with BaseCamp™ No
Chronograph No
Available gym activity profiles Strength Training, Cardio Training, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing and Yoga
Automatic altitude adjustment No
Ambient light sensor No
Bezel Material stainless steel
Touch-targeting (touch target on display to see the distance to any point) No
Hazards and course targets No
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) Yes
TruSwing™ compatible No
UltraTrac mode Yes
Yardage to F/M/B (distance to front, middle and back of green) No
Calendar Yes
Barometric altimeter Yes
Unlock new step icons No
Weather Yes
Auto Lap® Yes
Sunrise/sunset times Yes
Floors climbed Yes
% HR max Yes
% HRR Yes
Available outdoor recreation profiles Skiing, Snowboarding, XC Skiing, Stand up Paddleboarding, Rowing
TracBack® Yes
Storm alert No
Water rating 5 ATM
Advanced Vector support No
Handicap scoring No
Audible alerts No
Color display Yes
Multiple bike profiles No
HR zones Yes
Stat tracking (strokes, putts per round, greens and fairways hit) No
Connectivity Bluetooth®, ANT+®, Wi-Fi®
Find My Phone Yes
Custom targets No
Downloadable cartography support No
Swim efficiency (SWOLF) Yes
Available run profiles Running, Treadmill Running, Indoor Track, Trail Running
Bike lap and lap maximum power (with power sensor) No
Stopwatch Yes
Run workouts Yes
Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, calories) No
Training Effect (aerobic) Yes
Worldwide airport database(s) No
Waypoint information page No
GPS speed and distance Yes
Round-trip course creator (running/cycling) No
Area calculation No
Find My Watch Yes
Advanced workouts Yes
Strava features (Beacon, live segments) Yes
VIRB® Camera Remote Yes
Smartphone compatibility iPhone® and Android™
Dual grid coordinates No
TrueUp™ Yes
Timer Yes
Multiple time zones with Zulu/UTC No
Trimix support No
Courses Yes
Compatible with Varia™ lights Yes
Thermometer Yes
Alarm clock Yes
Wirelessly receive flight plans from Garmin Pilot™ No
Group LiveTrack No
Intensity minutes Yes
Interval training Yes
Gyroscope Yes
Time/distance alerts (triggers alarm when you reach goal) Yes
Compatible with Garmin Connect™ Mobile Yes
Touchscreen No
Virtual starting line No
Preloaded topographical maps No
Speed and cadence sensor support (with sensor) yes (ANT+® and Bluetooth® Smart)
Sun and moon information No
Night vision mode No
Available swim profiles Pool Swimming
Tempo Training No
Move IQ™ Yes
Automatically saves dive entry and exit locations No
Garmin Elevate™ wrist heart rate monitor Yes
GLONASS Yes
Smart notifications Yes
Sight ‘N Go No
Garmin Pay™ Yes
Automatic daylight saving time Yes
Depth sensor No
Projected waypoint No
Bread crumb trail in real time Yes
Time/date yes
Sync dive log to Garmin Connect™ and Garmin Connect™ Mobile No
Rewards (coins) No
Calories burned Yes
Customizable activity profiles Yes
Auto start/end dive No
Toe-to-Toe™ Challenges No
Segments (Live, Garmin) Yes
Connect IQ™ (downloadable watch faces, data fields, widgets and apps) Yes
HR Broadcast (broadcasts HR data over ANT+™ to paired devices) Yes
Cadence (provides real-time number of steps per minute) Yes
Controls smartphone music Yes
Power meter compatible (displays power data from compatible third-party ANT+™-enabled power meters) No
Total ascent/descent Yes
Cycle Map (routable cycling-specific street map) No
PinPointer No
Step counter Yes
Quick Release Bands yes (20 mm, Industry standard)
APNEA hunt mode No
60-minute activity goal No
Trail run auto climb No
Chores No
Barometric trend indicator with Storm Alert No
Automatic rep counting Yes
LiveTrack Yes
Moving Map with aviation airports, navaids, roads, bodies of water and more No
HR calories Yes
Point-to-point navigation Yes
Anchor Alarm No
Gauge mode No
Yardage to layups/doglegs No
Auto Pause® Yes
All-day Stress Tracking Yes
Running dynamics Yes
Full vector map No
Tack assist mode No
Body Battery™ Energy Monitor No
Worldwide NAVAID and Intersection database(s) No
Available cycling profiles Biking, Indoor Biking
Future elevation plot No
Accelerometer Yes
Recovery time Yes
Text response/reject phone call with text (Android™ only) Yes
Around Me mode No
Hunt/fish calendar No
Drill logging Yes
Course guidance Yes
Strap material silicone
GPS Time Sync Yes
Countdown timer No
Auto scroll Yes
Analog hands No
Round timer/odometer No
Compass Yes
Lens Material chemically strengthened glass
Cardio workouts Yes
Green View with manual pin position No
Performance condition (after running 6–20 minutes, compares your real-time condition to your average fitness level) Yes
Strength workouts Yes
Distance to destination Yes
Training Status (lets you see if you’re training effectively by tracking your training history and fitness level trend.) Yes
Manual lap Yes
Distance traveled Yes
Pool swim metrics (lengths, distance, pace, stroke count/rate, calories) Yes
GPS-based distance, time and pace Yes
Auto goal (learns your activity level and assigns a daily step goal) Yes
Garmin AutoShot™ No
Fitness Age yes (in app)
Nitrox support No
Unit-to-unit route/location sharing No
FTP (Functional Threshold Power) No
Dive ascent/descent rate indicator No
Built-in barometer and tide tables No
Race predictor Yes

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  • Forerunner 645
  • Charging cable
  • Documentation

1 YEAR LIMITED WARRANTY POLICY
All Garmin products are warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin Australasia Pty Ltd., will, at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labour, provided that the customer shall be responsible for any transportation cost. This warranty does not cover failures due to abuse, misuse, accident or unauthorised alterations or repairs.
Garmin retains the exclusive right to repair or replace the product or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.

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Additional information

Forerunner 645

Garmin Forerunner 645, Black, Garmin Forerunner® 645, Sandstone

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