Garmin Forerunners are a popular fitness watch for runners. With many different styles and colours to choose from, it’s easy to see why runners chose Garmin to track their performance.
Product
Garmin Forerunners
Forerunner 45s/45
forerunner 45
Forerunner 55
forerunner 55
Forerunner 245
Forerunner 245
Forerunner 245 Music
Forerunner 245 Music
Forerunner 745
forerunner 745
Forerunner 945
Forerunner 945
Forerunner 945 LTE
 forerunner 945 lte
Unit Dimensions (WxHxD) 45: 42 x 42 x 11.4 mm
45S: 39.5 x 39.5 x 11.4 mm
42 x 42 x 11.6 mm
Fits wrists with a circumference of 126-203 mm
42.3 x 42.3 x 12.2 mm42.3 x 42.3 x 12.2 mm43.8 x 43.8 x 13.3 mm47 x 47 x 13.9 mm
Fits wrists with a circumference of 130-220 mm
44.4 x 44.4 x 13.9 mm
Fits wrists with a circumference of 128-218 mm
QuickFit Watch Band Compatible ✅ (22mm)
Quick Release Bands ✅ (20 mm, Industry standard)✅ (20 mm, Industry standard)✅ (20 mm, Industry standard)✅ (22 mm compatible)✅ (22 mm compatible)
Lens Materialchemically strengthened glasschemically strengthened glassCorning® Gorilla® Glass 3Corning® Gorilla® Glass 3Corning® Gorilla® Glass DXCorning® Gorilla® Glass DXCorning® Gorilla® Glass DX
Display Size (WxH)1.04″ (26.3 mm) diameter1.04″ (26.3 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter1.2″ (30.4 mm) diameter
Display Resolution (WxH)208 x 208 pixels208 x 208 pixels240 x 240 pixels240 x 240 pixels240 x 240 pixels240 x 240 pixels240 x 240 pixels
Weight45: 36 g
45S: 32 g
37 g38.5 g38.5 g47 g50 g49 g
Batteryrechargeable
lithium-ion
rechargeable
lithium-ion
rechargeable
lithium-ion
rechargeable
lithium-ion
rechargeable
lithium-ion
rechargeable
lithium-ion
rechargeable
lithium-ion
Battery LifeSmartwatch Mode: Up to 7 days
GPS mode: Up to 13 hours
Smartwatch Mode: Up to 2 weeks
GPS mode: Up to 20 hours
Smartwatch Mode: Up to 7 days
GPS mode: Up to 24 hours
Smartwatch Mode: Up to 7 days
GPS mode with music: Up to 6 hours
GPS mode: Up to 24 hours Mode
Smartwatch mode: Up to 7 days
GPS mode with music: Up to 6 hours
GPS mode without music: Up to 16 hours
UltraTrac™ mode: Up to 24 hours Mode
Smart Mode: Up to 2 weeks
GPS mode with music: Up to 10 hours
GPS mode without music: Up to 36 hours
Smartwatch Mode: Up to 2 weeks
GPS mode with music: Up to 12 hours
GPS mode with music and LTE LiveTrack: Up to 7 hours
GPS mode without music: Up to 35 hours
Waterproof✅ (50m)✅ (50m)✅ (50m)✅ (50m)✅ (50m)✅ (50m)✅ (50m)
History200 hours of activity data200 hours of activity data200 hours of activity data200 hours of activity data200 hours of activity data200 hours of activity data200 hours of activity data
Clock Features Clock FeaturesClock FeaturesClock FeaturesClock FeaturesClock FeaturesClock FeaturesClock Features
Time/Date
GPS Time Sync
Automatic Daylight Savings Time
Alarm Clock
Timer
Stopwatch
Sunrise/Sunset Times
Sensors SensorsSensorsSensorsSensorsSensorsSensorsSensors
GPS
GLONASS
Galileo
Garmin Elevate Wrist Heart Rate Monitor
Barometric Altimeter
Compass
Gyroscope
Accelerometer
Thermometer
Pulse Ox Blood Oxygen Saturation Monitor
Daily Smart Features Daily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart FeaturesDaily Smart Features
Connectivity Bluetooth®, ANT+®Bluetooth® Smart, ANT+®, Wi-Fi®Bluetooth® Smart, ANT+®, Wi-Fi®Bluetooth® Smart, ANT+®, Wi-Fi®Bluetooth®, ANT+®, Wi-Fi®, LTE (with subscription)
Connect IQ✅ (watch faces only)
Smart Notifications
Text Response/Reject Phone Call with Text
Calendar
Weather
Controls Smartphone Music
Plays and Controls Watch Music
Music Storage ✅ (up to 500 songs)✅ (up to 500 songs)✅ (up to 500 songs)✅ (up to 500 songs)
Find my Phone Feature
Find my Watch Feature
VIRB Remote
Smartphone Compatibility iPhone® and Android®iPhone® and Android®iPhone® and Android®iPhone® and Android®iPhone® and Android®iPhone® and Android®iPhone® and Android®
Compatible with Garmin Connect Mobile
Garmin Pay
Health Monitoring Health MonitoringHealth MonitoringHealth MonitoringHealth MonitoringHealth MonitoringHealth MonitoringHealth Monitoring
Wrist-based Heart Rate
Daily Resting Heart Rate
Abnormal Heart Rate
Respiration Rate (24/7)
Pulse Ox✅ (spot-check and optionally in sleep)✅ (spot-check and optionally in sleep)✅ (spot-check, and optional all-day acclimation and in sleep)✅ (spot-check, and optional all-day acclimation and in sleep)
Fitness Age✅ (in app)✅ (in app)✅ (in app)
Body Battery Energy Monitor✅ (in app)✅ (in app)✅ (in app)
All-day Stress Tracking
Relaxation Reminders
Relaxation Breathing Timer
Sleep✅ (Advanced) ✅ (Advanced)✅ (Advanced)✅ (Advanced)✅ (Advanced)
Hydration✅ (in Garmin Connect)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)
Woman’s Health✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)✅ (in Garmin Connect and optional Connect IQ widget)
Activity Tracking Features Activity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking FeaturesActivity Tracking Features
Step Counter
Move Bar (Displays on Device after a period of inactivity; walk for a couple of minuets to reset it)
Auto Goal (Learns your activity level and assigns a daily step goal)
Calories Burned
Floor Climbed
Distance Traveled
Intensity Minuets
TrueUp
Move IQ
Body Battery Energy Monitor ✅ (in app)✅ (in app)✅ (in app)
All-Day Stress Tracking
Training, Planning and Analysis Features Training, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis FeaturesTraining, Planning and Analysis Features
Activity History on Watch
Customizable Activity Profiles
Customizable Alerts
Audio Prompts
Auto Multisport Activities
Course Guidance
Interval Training
Improved Interval (includes open repeats, intervals data package, reset screen and auto detection)
Advanced Workouts (create custom, goal-oriented workouts)
Auto Lap
Auto Pause
Auto Scroll
Customizable Data Pages
Manual Multisport Activities
Virtual Partner
Finish Time
Fitness Age ✅ (in app)✅ (in app)✅ (in app)✅ (in app)✅ (in app)✅ (in app)
Hot Keys
Configure Lab Alerts
Touch and/or Button Lock
Manual Lap
Personal Records (running, cycling, swimming)
Segments (Live, Garmin)
GPS Speed and Distance
Training Effect (aerobic)
Training Effect (anaerobic)
Training Load (your total training load for the last 7 days calculated from estimated EPOC)
Downloadable Training Plans
Training Status (lets you see if you’re training effectively by tracking your training history and fitness level trend)
V02 Max
Improved Recovery Time ✅ (limited)
Daily Suggested workouts✅ (limited)
Vibration Alerts
Virtual Racer
Heart Rate Features Heart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate FeaturesHeart Rate Features
HR Zones
HR Alerts
HR Calories
% HR Max
% HRR
Recovery Time
Auto Max HR
HRV Stress Test (measure your heart rate viability while standing still, for 3 minuets, to provide you with an estimated stress level; the scale of this is 1 to 100; low scored indicate lower stress level) ✅ (with compatible accessory)✅ (with compatible accessory)
HR Strap Compatible ✅ (ANT+® and Bluetooth® Smart)✅ (ANT+® and Bluetooth® Smart)✅ (ANT+® and Bluetooth® Smart)
Records Heart Rate While Swimming ✅ (with HRM-Tri and HRM-Swim)✅ (with HRM-Tri and HRM-Swim)✅ (with HRM-Tri and HRM-Swim)
HR Broadcast (Broadcasts HR Data over ANT to paired devices)
Running Features Running FeaturesRunning FeaturesRunning FeaturesRunning FeaturesRunning FeaturesRunning FeaturesRunning Features
Preloaded Run Profiles Running, Treadmill Running. Indoor Track Running may be added through appRunning, Treadmill Running, Track Running, Indoor Track Running, Virtual RunningRunning, Treadmill Running,Trail Running, Indoor TrackRunning, Treadmill Running,Trail Running, Indoor TrackRunning, Treadmill Running, Indoor and Outdoor Track Running, Virtual Running, Trail RunningRunning, Indoor and Outdoor Track Running, Treadmill Running, Trail Running, Virtual RunningRunning, Indoor and Outdoor Track Running, Treadmill Running, Trail Running, Virtual Running, Ultra Running
GPS-based Distance, Time and Pace
Running Dynamics ✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Vertical Oscillation and Ratio✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Ground Contact Time and Balance ✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Stride Length (real time) ✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Cadence (provides real-time number of steps per minuet)
Physiological Measurements
Performance Condition
Lactate Threshold ✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
PacePro Pacing Strategies
Run Workouts
Race Predictor
Foot pod Capable
Safety and Tracking Features Safety and Tracking FeaturesSafety and Tracking FeaturesSafety and Tracking FeaturesSafety and Tracking FeaturesSafety and Tracking FeaturesSafety and Tracking FeaturesSafety and Tracking Features
Incident Detection During Select Activities ✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)
Assistance ✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)✅ (Smartphone Required)✅   (with LTE subscription; coverage details)
Assistance Plus
Spectator Messaging ✅  (with LTE subscription; coverage details)
LiveTrack
Group Live Track
Live Event Sharing✅ Android® Only✅ Android® Only✅ Android® Only✅ Android® Only✅ Android® Only✅ Android® Only
Fitness Equipment/GymFitness Equipment/GymFitness Equipment/GymFitness Equipment/GymFitness Equipment/GymFitness Equipment/GymFitness Equipment/GymFitness Equipment/Gym
Preloaded Gym Activity Profiles Cardio and Elliptical Training, Stair Stepping, Yoga may be added through appCardio and Elliptical Training, Stair Stepping, HIIT, Pilates, YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Indoor Rowing and YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Indoor Rowing and YogaStrength, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates and YogaStrength Training, Cardio Training, Elliptical Training, Stair Stepping, Indoor Rowing and YogaStrength, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Breathwork, Pilates and Yoga
Cardio Workouts
Strength Workout
Yoga Workouts
Pilates Workouts
Automatic rep Counting
Outdoor Recreation Featured Outdoor Recreation FeaturedOutdoor Recreation FeaturedOutdoor Recreation FeaturedOutdoor Recreation FeaturedOutdoor Recreation FeaturedOutdoor Recreation FeaturedOutdoor Recreation Featured
Available Outdoor Recreation Profiles
Dual Grid Coordinates
Point-to-Point Navigation
Bread Crumb Trail in Real Time
Back to Start
Tracback
UltraTrac Mode
Around Me Mode
Elevation Profile
Distance to Destination
Barometric Trend Indicator
Storm Alert
Trail Run Auto Climb
Vertical Speed
Total Ascent/Descent
Compatible with BaseCamp
Preloaded Topographical Maps
Downloadable Cartography Support
GPS Coordinates
Projected Waypoint
Straight ‘N Go
Area Calculation ✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)
Hunt/Fish Calendar ✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)
Sun and Moon Information ✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)✅ (via Connect IQ®)
Dual Grid Coordinates
XERO Location
Cycling Features Cycling FeaturesCycling FeaturesCycling FeaturesCycling FeaturesCycling FeaturesCycling FeaturesCycling Features
Available Cycling Profiles Biking. Indoor Biking may be added through appBiking, Indoor BikingBiking, Indoor BikingBiking, Indoor BikingBiking, Indoor Biking, Mountain BikingBiking, Indoor Biking, Mountain BikingBiking, Indoor Biking, Mountain Trail Biking, eBiking, eMountain Trail Biking
Alerts
Courses Cycle Map
MTB Grit & FLow
Bike Lap and Lap Maximum Power
Race an Activity
Time/Distance Alerts
FTP (Functional Threshold Power) ✅ (with compatible accessory)✅ (with compatible accessory)✅ (with compatible accessory)
Strava Features
Compatible with Vector
Power Meter Compatible
Compatible with Varia Radar
Compatible with Lights
Speed and Cadence Sensor Support ✅ (ANT+® and Bluetooth® Smart sensors)✅ (ANT+® and Bluetooth® Smart sensors)
Swimming Features Swimming FeaturesSwimming FeaturesSwimming FeaturesSwimming FeaturesSwimming FeaturesSwimming FeaturesSwimming Features
Available Swim Profiles Pool SwimmingPool SwimmingPool SwimmingPool Swimming, Open Water SwimmingPool Swimming, Open Water SwimmingPool Swimming, Open Water Swimming, Swim running
Open-water Swim Metrics
Pool Swim Metrics
Stroke Type Detection
Drill Logging
Swim Efficiency
Basic Rest Timer
“Repeat on” Rest Timer
Auto Rest
Time and Distance Alerts
Countdown Start
Pool Swim Workouts
Critical Swim Speed
Countdown Start
Pool Swim Workouts
Critical Swim Speed
Countdown Start
Underwater Wrist-based Heart Rate
Heart Rate ✅ (with HRM-Tri™, HRM-Swim™ and HRM-Pro™)✅ (with HRM-Tri™, HRM-Swim™ and HRM-Pro™)✅ (with HRM-Tri™, HRM-Swim™ and HRM-Pro™)
Golfing Features Golfing FeaturesGolfing FeaturesGolfing FeaturesGolfing FeaturesGolfing FeaturesGolfing FeaturesGolfing Features
Yardage to F/M/B (distance to front, Middle and back of green)
Yardage to Layups/Doglegs
Measure Shot Distance
Digital Scorecard
Stat Tracking
Garmin AutoShot
Green View with Manual Pin Position
PinPointer
Handicap Scoring
Hazards and Course Targets
TrueSwing Compatible
Round Timer/odometer

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