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Garmin Forerunner 255 vs Forerunner 945

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Garmin Forerunner 255 vs Forerunner 945 Full Specifications Comparison

 
 
Product Info
Garmin Forerunner 255 Music (46mm) Specifications

Garmin Forerunner 255 Music (46mm) Specifications, Features and Price

Garmin Forerunner 945 Specifications, Features and Price

Price $387.30 $347.00
ABOUT DEVICE ABOUT DEVICE ABOUT DEVICE
Device name Garmin Forerunner 255 Music (46mm) Garmin Forerunner 945
Device type Fitness/Sport smartwatch Fitness/Sport smartwatch
Gender Men Men
Predecessor Garmin Forerunner 245 Garmin Forerunner 935
Successor Garmin Forerunner 955
Models Garmin Forerunner 255 Music, Garmin Forerunner 255 Standard Forerunner 945, Forerunner 945 LTE
Date released June, 2022 April, 2019
DISPLAY DISPLAY DISPLAY
Display size 1.3 inches 1.2 inches
Display type LCD, Memory-in-pixel (MIP), transflective LCD, Memory-in-pixel (MIP), transflective
Resolution 260 x 260 px 240 x 240 px
Pixel density 282.84 PPI 282.84 PPI
Customizable watchface Yes Yes
Input type (not touchscreen), 5 Physical buttons (not touchscreen), 5 Physical buttons
Always-On Yes Yes
BODY BODY BODY
Shape Circular Circular
Case material Fiber-reinforced polymer Fiber-reinforced polymer
Strap material Silicone Silicone
Bezel material Fiber-reinforced polymer Fiber-reinforced polymer
Strap size 22 mm 22 mm
Color Black, Whitestone Black
Screen protection Corning Gorilla Glass 3 Corning Gorilla Glass DX
Dimension 45.6 x 45.6 x 12.9mm 47 x 47 x 13.7 mm
Weight 49g 50 grams
Waterproof rating Yes, 5ATM Yes, 5ATM
Swim-proof Yes, recommended Yes, recommended
Durability test
CONNECTIVITY CONNECTIVITY CONNECTIVITY
Bluetooth calling No No
Bluetooth ANT+, Bluetooth ANT+, Bluetooth
Wi-Fi Yes, Wi-Fi 802.11 b/g/n Yes, Wi-Fi 802.11 b/g/n
NFC Yes Yes
MEMORY MEMORY MEMORY
RAM
ROM 4GB 16GB
Memory card slot No No
CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY
Network technology None None
SIM type None None
NOTIFICATIONS NOTIFICATIONS NOTIFICATIONS
SMS alert Yes Yes
Calls alert Yes Yes
Email alert Yes Yes
Event reminder Yes Yes
Reply messages (Android only), Yes (Android only), Yes
MEDIA MEDIA MEDIA
Audio mp3/mp4 mp3/mp4
Microphone No No
Loudspeaker No No
Bluetooth music Yes Yes
Camera No No
SENSORS SENSORS SENSORS
GPS Galileo, GLONASS, GPS Galileo, GLONASS, GPS
Accelerometer Yes Yes
HRM Yes Yes
Gyroscope Yes Yes
Pulse Ox. Yes Yes
Altimeter Yes Yes
Barometer Yes Yes
Compass Yes Yes
ECG No No
Thermometer Yes Yes
Ambient light Yes Yes
HEALTH & FITNESS TRACKING HEALTH & FITNESS TRACKING HEALTH & FITNESS TRACKING
Steps Yes Yes
Calories Yes Yes
Distance Yes Yes
Heart rate monitoring Yes Yes
Sleep tracking Yes Yes
Floors climbed Yes Yes
Blood oxygen Yes Yes
Blood Pressure No No
Stress Yes Yes
ECG tracking No No
Fall detection Yes Yes
Menstrual cycle Yes Yes
VO2 Max Yes Yes
Onscreen workout Yes Yes
Preloaded sport modes Yes Yes
BATTERY BATTERY BATTERY
Battery type non-removable Lithium-polymer non-removable Lithium-polymer
Battery capacity
Battery life GPS mode: Up to 26 hours, Smartwatch mode: up to 12 days GPS with music: up to 10hrs, Smartwatch mode: Up to 2 weeks, Ultratrac: up to 60hrs
Charging type Charging dock Charging dock
Charging duration 1-2 hours 1-2 hours
Solar power No No
PLATFORM PLATFORM PLATFORM
Operating system Proprietary OS Proprietary OS
Chipset
CPU
GPU
MISCELLANEOUS MISCELLANEOUS MISCELLANEOUS
Companion app Garmin Connect Garmin Connect
Compatibility Android 4.3+, iOS 7.0+ Android, iOS
Payment system Garmin Pay Garmin Pay
Customizable strap 22 mm, Yes 22 mm, Yes
Voice Assistant No No
Find my phone Yes Yes
Box content Charger, Garmin Forerunner 255 Music, Manual, Straps Charger, Garmin Forerunner 945, Manual, Straps
Price $387.30 $347.00

Garmin Forerunner 255 vs Forerunner 945 Activity Tracking Features

 Garmin Forerunner 255 MusicGarmin Forerunner 945

SMART FEATURES

Connect IQ (Downloadable watch faces, data fields, widgets, and apps)YesYes
On-device Connect IQ storeYesNo
Text response/reject phone calls with text (Android only)YesYes
CalendarYesYes
WeatherYesYes
Real-time settings sync with Garmin Connect™ mobileYesNo
Battery saver - customizable low power watchYesNo
Controls smartphone musicYesYes
Plays and Control Watch MusicYesYes
Find my phoneYesYes
Find my watchYesYes
Virb remoteYesYes

HEALTH MONITORING FEATURES

Wrist-based Heart Rate trackingYesYes
Daily resting heart rateYesYes
Abnormal heart rate alertYes (high and low)Yes
Respiration Rate (24/7)YesYes
Fitness AgeYesYes
Blood oxygen (SpO2) monitoringYes (spot-check, and optional all-day acclimation and in sleep)Yes (spot-check, and optionally all-day and in sleep)
Battery energy monitorYesYes
Stress trackingYesYes
Relaxation remindersYesYes
Relaxation breathing timerYesYes
Sleep monitoringYesYes
Advanced sleep tracking/Sleep ScoreYesYes
Menstrual cycle trackingYes (in Garmin Connect™ and optional Connect IQ™ widget)Yes (in Garmin Connect and optional Connect IQ widget)
Hydration trackingYes (in Garmin Connect and optional Connect IQ widget)Yes (in Garmin Connect and optional Connect IQ widget)
Health SnapshotYesNo

SAFETY AND TRACKING FEATURES

LivetrackYesYes
Group LivetrackNoYes
Live event sharingYes (Android only)Yes (Android Only)
Incident detection during select activitiesYesYes
AssistanceYesYes
Spectator Messaging (New)NoNo
Assistance Plus (New)NoNo

TACTICAL FEATURES

Stealth modeNoNo
Night vision modeNoNo
Dual Grid CoordinatesNoYes
Kill switchNoNo

ACTIVITY TRACKING FEATURES

Steps CounterYesYes
Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)YesYes
Auto goal (learns your activity level and assigns a daily step goal)YesYes
Sleep monitoring (monitors total sleep and periods of movement or restful sleep)YesYes
Calories burnedYesYes
Floors climbedYesYes
Distance travelledYesYes
Intensity minutesYesYes
TrueupYesYes
Move IQ

YesYes

GYM & FITNESS EQUIPMENT

Available gym activity profilesStrength, HIIT, cardio and elliptical training, stair stepping, floor climbing, indoor rowing, pilates and yogastrength, cardio, elliptical training, stair stepping, floor climbing, indoor rowing, pilates and yoga
Cardio workoutsYesYes
Strength workoutsYesYes
HIIT workoutsYesNo
Yoga workoutsYesYes
Pilates workoutsYesYes
On-screen workout animationsYesYes
Automatic rep countingYesYes
On-screen workout muscle mapsYesNo

TRAINING, PLANNING & ANALYSIS FEATURES

GPS speed and distanceYesYes
Customizable data pagesYesYes
Customizable activity profilesYesYes
Auto PauseYesYes
Interval trainingYesYes
Improved interval (Includes open repeats, intervals data page, rest screen and auto detection) (New)YesNo
Advanced workoutsYesYes
Downloadable training plansYesYes
Power modes - customizable in-activity battery settingsNoNo
Auto lapYesYes
Manual lapYesYes
Rest timer (New)YesNo
Configurable lap alertsYesYes
Heat and altitude acclimationNoYes
VO2 Max. (Run)YesYes
VO2 Max. (Trail run)YesNo
Real-Time staminaNoNo
Training status (lets you see if you're training effectively by tracking your training history and fitness level trend.)YesYes
Training load (your total training load for the last 7 days calculated from estimated epoc)YesYes
Training load focusYesYes
Training effect (aerobic)YesYes
Training effect (anaerobic)YesYes
Primary Benefit (training effect labels)YesYes
Improved Recovery Time (New)YesYes
Daily Suggested Workouts (New)Yes (7 days)Yes
Custom alertsYesYes
Audio promptsYesYes
Finish timeYesYes
Virtual partnerYesYes
Race an activityYesYes
Auto multisport activitiesYesYes
Manual multisport activitiesYesYes
Course guidanceYesYes
Garmin Live SegmentsNoYes
Strava Live SegmentsNoYes
Round-Trip course creator (running/cycling)NoYes
Trendline Popularity RoutingNoyes (available as a wearable map theme)
Touch and/or button lockYesYes
Hot keysNoYes
Auto scrollYesYes
Activity history on watchYesYes
Physio TrueupYesYes

HEART RATE TRACKING FEATURES

HR zonesYesYes
HR alertsYesYes
HR caloriesYesYes
% HR max.YesYes
% HRRYesYes
Recovery timeYesYes
Auto max HRYesYes
Morning report (New)YesNo
Race glance/widget (New)YesNo
HRV status (New)YesNo
Training readiness (New)NoNo
HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels)Noyes (with compatible accessory)
HR broadcast (broadcasts HR data over ANT+ to paired devices)YesYes
Respiration rate (during exercise)Yesyes (with compatible accessory)

RUNNING FEATURES

Available run profilesRunning, outdoor track running, treadmill running, indoor track running, trail running, virtual running and ultra runningRunning, treadmill running, indoor track running, trail running, virtual running and outdoor track running
GPS-based distance, time and paceYesYes
Running dynamicsYes (with compatible accessory)Yes (with compatible accessory)
Vertical oscillation and ratio (the degree of 'bounce' in your running motion and the cost-benefit ratio with stride length)Yes (with compatible accessory)Yes (with compatible accessory)
Ground contact time and balance (shows how much time, in the running motion, your foot is on the ground rather than in flight and lets you check your running symmetry)Yes (with compatible accessory)Yes (with compatible accessory)
Stride length (real time)Yes (with compatible accessory)Yes (with compatible accessory)
Cadence (provides real-time number of steps per minute)YesYes
Running power (New)Yes (with compatible accessory)No
Performance condition (after running 20 minutes, compares your real-time condition to your average fitness level)YesYes
Lactate threshold (through analysis of your pace and heart rate, estimates the point where your muscles start to rapidly fatigue)Yes (with compatible accessory)Yes (with compatible accessory)
PacePro pacing strategiesYesYes
Run workoutsYesYes
Race predictorYesYes
Course and weather-specific race predictor (New)YesNo
Foot Pod CapableYesYes
Run/Walk/Stand detectionYes__

GOLF FEATURES

Preloaded with 42,000 courses worldwideNoYes
Yardage to F/M/B (distance to front, middle and back of green)NoYes
Yardage to layups/doglegsNoYes
Measures shot distance (calculates exact yardage for shots from anywhere on course)NoAutomatic
Digital ScorecardNoYes
Custom targetsNoNo
Stat tracking (strokes, putts per round, greens and fairways hit)NoYes
Garmin AutoshotNoYes
Full vector mapNoNo
Auto Courseview updatesNoYes
Green view with manual pin positionNoYes
Hazards and course targetsNoYes
PinpointerNoNo
Playslike distanceNoNo
Touch-targeting (touch target on display to see the distance to any point) (New)NoNo
Handicap scoringNoNo
Truswing compatibleNoYes
Round timer/odometerNoYes
Automatic club tracking compatible (requires accessory)NoNo
Tournament LegalNoNo

OUTDOOR RECREATION

Available outdoor recreation profilesHiking, skiing, snowboarding, XC classic skiing, stand Up paddleboarding and rowingHiking, climbing, mountain biking, skiing, snowboarding, xc skiing, stand up paddleboarding, rowing and kayaking
Point-to-Point navigationYesYes
Bread crumb trail in real timeYesYes
Back to startYesYes
TracbacKYesYes
Ultratrac ModeYesYes
Around me modeNoYes
Up aheadYesNo
Elevation profileYesYes
Distance to destinationYesYes
Barometric trend indicator with storm alertYesYes
ClimbPro ascent plannerNoYes
Trail run auto climbNoYes
Vertical speedYesYes
Total ascent/descentYesYes
Future elevation plotYesYes
Preloaded Topographical mapsNoYes
Preloaded road and trail maps (New)NoYes
Preloaded Ski resort mapsNoNo
Downloadable cartography supportNoYes
Compatible with BasecampNo__
GPS coordinatesYesYes
Sight 'N GONoNo
Area calculationNoYes (via Connect IQ)
Hunt/fish calendarNoYes (via Connect IQ)
Projected waypointYesYes
Sun and moon informationYesYes (via Connect IQ)
Xero locationsNoYes
Expedition GPS activityNoNo
TidesNoNo

CYCLING FEATURES

Available cycling profilesBiking, indoor biking, mountain biking, eBiking and eMountain bikingBiking, indoor biking and mountain trail biking
Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)YesYes
CoursesYesYes
MTB Grit & FlowNoYes
Cycle map (routable cycling-specific street map)NoYes
Bike lap and lap maximum power (with power sensor)YesYes
Race an activityYesYes
FTP (Functional Threshold Power)Yesyes (with compatible accessory)
Compatible with Vector (Power Meter)YesYes
Power Meter compatibleYesYes
Advanced cycling dynamicsNoYes
Compatible with Varia Vision (head-mounted display)YesYes
Compatible with Varia Radar (Rear-Facing Radar)YesYes
Compatible with Varia LightsYesYes
Speed and cadence sensor support (with sensor)Yes (ANT+ and Bluetooth Smart sensors)Yes

SWIMMING FEATURES

Available swim profilesPool swimming and open water swimmingPool swimming, open water swimming, swimming/running
Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)YesYes
Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)YesYes
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)YesYes
Drill logging (pool swim only)YesYes
Basic rest timer (up from 0) (pool swim only)YesYes
"Repeat on" rest timer (pool swim only) (New)YesYes
Auto rest (pool swim only) (New)YesYes
Time and distance alertsYesYes
Pacing alerts (pool swim only) (New)YesYes
Countdown start (pool swim only)YesYes
Pool swim workoutsYesYes
Critical swim speed (New)YesYes
Underwater wrist-based heart rateYesYes
Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)YesYes (with HRM-Tri and HRM-Swim)

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