Garmin · 2025
Instinct® 3 – 45 mm, SolarSize, Dimensions & Wrist Fit
Case Width
45mm
Thickness
14.9mm
Diameter
45mm
Weight
52g
The Garmin Instinct® 3 – 45 mm, Solar sits best on flat wrist widths of about 47–64mm (≈ 12.6–17.1cm wrist circumference). Adjust the slider below to check your wrist.
Does the Instinct® 3 – 45 mm, Solar fit your wrist?
Drag the slider to your wrist width and see the Instinct® 3 – 45 mm, Solar overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
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Garmin Instinct® 3 – 45 mm, Solar Full Specifications
Overview1
FamilyGarmin
General11
Battery life
Smartwatch: Up to 28 days/Unlimited with solar*
Battery Saver Watch Mode: Up to 65 days/Unlimited with solar*
GPS Only: Up to 40 hours/130 hours with solar**
All Satellite Systems: Up to 28 hours/50 hours with solar**
All Satellite Systems + Multi-Band: Up to 24 hours/40 hours with solar***
Max Battery GPS: Up to 100 hours/Unlimited with solar**
Expedition GPS: Up to 36 days/Unlimited with solar*
*Solar charging, assuming all-day wear with 3 hours per day outside in 50,000 lux conditions
**Solar charging, assuming use in 50,000 lux conditions
***Solar charging, assuming use in 50,000 lux conditions; assuming typical use with SatIQ technology
Battery typeLithium ion
Display Size
custom, two-window design; 0.9” x 0.9” (23 x 23 mm)
Case materialfiber-reinforced polymer
Lens MaterialPower Glass™
Bezel Materialfiber-reinforced polymer/aluminum
Memory/History128 MB
Strap materialsilicone
Charging methodGarmin proprietary plug charger
Display resolution176 x 176 pixels
QuickFit® watch band compatibleyes (22 mm)
Sensors11
GPSYes
CompassYes
GLONASSYes
GalileoYes
GyroscopeYes
ThermometerYes
AccelerometerYes
SatIQ™ TechnologyYes
Barometric altimeterYes
Pulse Ox Blood Oxygen Saturation MonitorYes
Garmin Elevate™ wrist heart rate monitorYes
Product Info5
Main SKU010-02934-00
Product ID1315317
Product NameInstinct® 3 – 45 mm, Solar
Release Date1/6/2025
Product VariationBlack with Black Band
Clock Features7
TimerYes
StopwatchYes
Time/dateYes
Alarm clockYes
GPS Time SyncYes
Sunrise/sunset timesYes
Automatic daylight saving timeYes
Gaming Features2
Gaming ActivityYes
GameOn™ app compatibleYes
Cycling Features13
CoursesYes
MTB Grit & FlowYes
Race an activityYes
Power meter compatibleYes
Advanced cycling dynamicsYes
Compatible with Varia™ lightsYes
FTP (Functional Threshold Power)Yes
Speed and cadence sensor support (w/sensor)Yes
Bike lap and lap maximum power (with power sensor)Yes
Compatible with Varia™ radar (rear-facing radar)Yes
Compatible with Vector™ and Rally™ (power meters)Yes
Compatible with Varia Vision™ (head-mounted display)Yes
Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)Yes
Golfing Features13
Tournament legalYes
Digital scorecardYes
Garmin AutoShot™Yes
Round timer/odometerYes
Auto CourseView updatesYes
Yardage to layups/doglegsYes
Hazards and course targetsYes
Pairs with Garmin Golf appYes
Green View with manual pin positionYes
CT10 Automatic club tracking compatible (requires accessory)Yes
Yardage to F/M/B (distance to front, middle and back of green)Yes
Stat tracking (strokes, putts per round, greens and fairways hit)Yes
Measures shot distance (calculates exact yardage for shots from anywhere on course)manual
Running Features16
Run workoutsYes
Running powerYes
Race predictorYes
Foot pod capableYes
Running dynamicsYes
Lactate thresholdyes (with compatible accessory)
Grade-adjusted paceYes
Trail run auto climbYes
Performance conditionYes
Run/Walk/Stand detectionYes
Stride length (real time)Yes
PacePro™ Pacing StrategiesYes
Vertical oscillation and ratioYes
Ground contact time and balanceyes (GCT balance with accessory)
GPS-based distance, time and paceYes
Cadence (provides real-time number of steps per minute)Yes
What You'll Love11
Display type
Monochrome, sunlight-visible, transflective memory-in-pixel (MIP)
Water rating10 ATM
Garmin Pay™Yes
LED flashlightYes
Multi-band GPSYes
Solar ChargingYes
Training statusYes
Training readinessYes
Pulse Ox blood oxygenYes
Sleep score and insightsYes
Battery life (smartwatch mode)Up to 28 daysUnlimited with solar
Activity Profiles15
Gym
Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing
SwimPool Swimming, Open Water Swimming
Cycling
Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX
WellnessWalking, Indoor Walking, Pilates, Yoga
MultisportTriathlon
In the ringBoxing, Mixed Martial Arts
Team sports
Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball
Motor sports
Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling
On the Water
Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Water Skiing, Snorkeling, Wakeboarding, Wakesurfing, Tubing, Whitewater
Racket sports
Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball
Snow & winter
Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, XC Skate Skiing, Backcountry Skiing, Ice Skating, Snowshoeing
Indoor running
Treadmill Running, Indoor Track Running, Virtual Running
Outdoor running
Running, Outdoor Track Running, Trail Running, Obstacle Racing
Outdoor recreation
Hiking, Rucking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery
Other activity profilesTactical, Inline Skating
Swimming Features12
Pool swim workoutsYes
Time and distance alertsYes
Auto rest (pool swim only)Yes
Drill logging (pool swim only)Yes
Countdown start (pool swim only)Yes
Underwater wrist-based heart rateYes
"Repeat on" rest timer (pool swim only)Yes
Basic rest timer (up from 0) (pool swim only)Yes
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)Yes
Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)Yes
Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)Yes
Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)Yes
Tactical Features2
XERO™ LocationsYes
Dual grid coordinatesYes
Outdoor Recreation20
TidesYes
TracBack®Yes
Sight 'N GoYes
Tide glanceYes
Back to startYes
UltraTrac modeYes
Vertical speedYes
GPS coordinatesYes
Reference pointYes
Area calculationYes
Elevation profileYes
Projected waypointYes
Total ascent/descentYes
Future elevation plotYes
Distance to destinationYes
Expedition GPS ActivityYes
Sun and moon informationYes
Point-to-point navigationYes
Bread crumb trail in real timeYes
Barometric trend indicator with Storm AlertYes
Daily Smart Features20
CalendarYes
PasscodeYes
ConnectivityBluetooth®, ANT+®
Garmin ShareYes
Find My PhoneYes
Find My WatchYes
VIRB® RemoteYes
Morning reportYes
Weather forecastsYes
Smart NotificationsYes
Smart trainer controlYes
Smartphone compatibilityiPhone®, Android™
Controls smartphone musicYes
On-device Connect IQ™ StoreYes
Pairs with Garmin Connect™ MobileYes
Compatible with Garmin Messenger appYes
Battery saver (customizable low power watch)Yes
Realtime settings sync with Garmin Connect™ mobileYes
Text response/reject phone call with text (Android™ only)Yes
Connect IQ™ (downloadable watch faces, data fields and apps)Yes
Activity Tracking Features11
TrueUp™Yes
Move IQ™Yes
Step counterYes
Floors climbedYes
Calories burnedYes
Distance traveledYes
Intensity minutesYes
Automatic rep countingYes
Garmin Connect™ Challenges appyes (optional Connect IQ app)
Move alerts (displays on device after a period of inactivity)Yes
Auto goal (learns your activity level and assigns a daily step goal)Yes
Workout and Training Plans9
HIIT workoutsYes
Yoga workoutsYes
Cardio workoutsYes
Pilates workoutsYes
Strength workoutsYes
Garmin Running Coach ExpertsYes
Garmin Coach - Prebuilt Cycling PlansYes
Daily Suggested Workout - Cycling (Pace and Heart Rate Based)Yes
Daily Suggested Workout - Running (Pace and Heart Rate Based)Yes
Health & Wellness Monitoring17
Sleepyes (advanced)
Hydration
yes (in Garmin Connect™ and optional Connect IQ™ widget)
BreathworkYes
Fitness ageYes
Sleep coachYes
Nap detectionYes
All-day stressYes
Women's health
yes (in Garmin Connect™ and optional Connect IQ™ widget)
Health snapshotYes
Respiration rateYes
Resting heart rateYes
Breathing variationsYes
Relaxation remindersYes
Abnormal heart rate alertsyes (high and low)
Relaxation breathing timerYes
Body Battery™ energy monitorYes
Wrist-based heart rate (constant, every second)Yes
Safety and Tracking Features4
AssistanceYes
Live Event SharingYes
Incident Detection during select activitiesYes
Incident detection alert on phone for wearablesYes
Kid Activity Tracking Features1
Toe-to-Toe™ Challenges app
yes (optional Connect IQ Toe-to-Toe™ Challenges app)
Training, Planning and Analysis Features49
% HRRYes
% HR maxYes
HR zonesYes
HR alertsYes
ShortcutsYes
HRV statusYes
Load ratioYes
Manual lapYes
Rest timerYes
Auto max HRYes
Auto scrollYes
Finish timeYes
HR caloriesYes
Voice alertsYes
Custom alertsYes
Physio TrueUpYes
Recovery timeYes
Training loadYes
VO2 Max (Run)Yes
Course guidanceYes
Training effectYes
Virtual PartnerYes
Workout benefitYes
Race an ActivityYes
Advanced workoutsYes
Interval trainingYes
Race glance/widgetYes
Training load focusYes
VO2 Max (Trail Run)Yes
GPS speed and distanceYes
Configurable lap alertsYes
Customizable data pagesYes
Unified training statusYes
Touch and/or button lockYes
Activity history on watchYes
Multisport auto transitionYes
Downloadable training plansYes
Training effect (anaerobic)Yes
Manual multisport activitiesYes
HRM running pace and distanceYes
Heat and altitude acclimationYes
Customizable activity profilesYes
Auto Pause® automatic timer haltYes
Respiration rate (during exercise)yes (with compatible accessory)
Auto Lap® interval tracking featureYes
Primary benefit (Training Effect labels)Yes
Power Modes - customizable in-activity battery settingsYes
HR broadcast (broadcasts HR data over ANT+® to paired devices)Yes
Improved interval (includes open repeats, intervals data page, rest screen and auto detection)Yes
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Instinct® 3 – 45 mm, Solar — Frequently Asked Questions
What size is the Garmin Instinct® 3 – 45 mm, Solar?
The Garmin Instinct® 3 – 45 mm, Solar has a 45mm case and is 14.9mm thick.
Will the Garmin Instinct® 3 – 45 mm, Solar fit my wrist?
The Garmin Instinct® 3 – 45 mm, Solar looks balanced on flat wrist widths of roughly 47–64mm (about 12.6–17.1cm circumference). Use the interactive fit tool above to check against your own wrist.
How much does the Garmin Instinct® 3 – 45 mm, Solar weigh?
The Garmin Instinct® 3 – 45 mm, Solar weighs 52g (case only; straps add weight).
What is the best way to compare the Garmin Instinct® 3 – 45 mm, Solar with other watches?
Use our side-by-side comparison tool to see the Garmin Instinct® 3 – 45 mm, Solar next to any other watch — case size, thickness, lug-to-lug and full specs, scaled to real proportions.