Garmin · 2016
Fenix 3 HRSize, Dimensions & Wrist Fit
The Garmin Fenix 3 HR sits best on flat wrist widths of about 54–73mm (≈ 14.4–19.5cm wrist circumference). Adjust the slider below to check your wrist.
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The fēnix® 3 HR in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Rated for 40 hours of use per charge.
- 86g on the wrist. Lighter than 79% of the 51mm watches we have weights for.
- 1.2” (30.4 mm) diameter display.
- Takes 26mm bands, so third-party straps fit without an adapter.
Does the Fenix 3 HR fit your wrist?
Drag the slider to your wrist width and see the Fenix 3 HR overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Garmin fēnix® 3 HR
Case 51.0mm · Lug-to-lug 51.0mm · Thickness 17.5mm · 86g
Sweet Spot
51mm on a 55mm wrist
Across the wrist it works — 2.0mm spare each side — but adds close to half your wrist's own depth again — expect it to snag cuffs and doorframes.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 51mm.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist2.0mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist17.5mm off the skin
Adds close to half your wrist's own depth again — expect it to snag cuffs and doorframes. (17.5mm case, back against the skin)
- How it seats~8.8mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist86g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.6g per mm of wrist)
Happy with the fit? Check current availability for the Fenix 3 HR.
Check offer2D Dimension Schematics
The fēnix® 3 HR drawn to scale — from above, and in profile against the wrist.
- Garmin fēnix® 3 HR51mm · 17.5mm thick
3D preview
Garmin fēnix® 3 HR on a wrist
On an arm sized to your own wrist — the view a product photo never gives you.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
fēnix® 3 HR battery life
The runtime the manufacturer publishes for everyday use.
- Smartwatch40 hours
How the fēnix® 3 HR ranks on battery
Against the 296 Garmin watches in our database, ranked on each figure Garmin publishes.
- Everyday use14 days#151 of 285
- GPS tracking16 hours#204 of 267
What size band does the fēnix® 3 HR take?
Lug width
26mm
Any 26mm strap fits, so you are not restricted to Garmin's own bands. Quick-release pins let you swap without tools — check that a replacement lists 26mm and quick-release before buying.
Affiliate disclosure: As an Amazon Associate, WatchFitTool earns from qualifying purchases. If you buy through links on this page, we may earn a commission at no extra cost to you. Learn more.
fēnix® 3 HR specifications
The figures that decide a purchase, followed by every line Garmin publishes.
- Battery life
- Smartwatch mode: Up to 2 weeksGPS mode: Up to 16 hoursUltraTrac™ mode: Up to 40 hours
- Display
- 1.2” (30.4 mm) diameter
- Resolution
- 218 x 218 pixels
- Case material
- fiber-reinforced polymer
- Bezel
- stainless steel
- Glass
- domed sapphire crystal
- Strap
- silicone
- Storage
- 32 MB
Full specification sheet
133 published lines across 16 groups, unedited
Overview
- Family
- Garmin
General
- Battery life
- Smartwatch mode: Up to 2 weeksGPS mode: Up to 16 hoursUltraTrac™ mode: Up to 40 hours
- Display Size
- 1.2” (30.4 mm) diameter
- Case material
- fiber-reinforced polymer
- Color display
- Lens Material
- domed sapphire crystal
- Bezel Material
- stainless steel
- Memory/History
- 32 MB
- Strap material
- silicone
- Display resolution
- 218 x 218 pixels
- QuickFit® watch band compatible
- yes (26 mm)
Sensors
- GPS
- Compass
- GLONASS
- Thermometer
- Accelerometer
- Barometric altimeter
- Garmin Elevate™ wrist heart rate monitor
Product Info
- Main SKU
- 010-01338-70
- Product ID
- 545480
- Product Name
- fēnix® 3 HR
- Product Variation
- Slate Gray with Black Band
Clock Features
- Timer
- Stopwatch
- Time/date
- Alarm clock
- GPS Time Sync
- Sunrise/sunset times
- Automatic daylight saving time
Cycling Features
- Courses
- Race an activity
- Power meter compatible
- Bike lap and lap maximum power (with power sensor)
- Compatible with Vector™ and Rally™ (power meters)
- Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
Golfing Features
- Digital scorecard
- Yardage to layups/doglegs
- Yardage to F/M/B (distance to front, middle and back of green)
- Measures shot distance (calculates exact yardage for shots from anywhere on course)
- manual
Running Features
- Run workouts
- Race predictor
- Foot pod capable
- Running dynamics
- Lactate threshold
- yes (with compatible accessory)
- Trail run auto climb
- Performance condition
- Stride length (real time)
- yes (with compatible accessory)
- Vertical oscillation and ratio
- yes (with compatible accessory)
- Ground contact time and balance
- yes (with compatible accessory)
- GPS-based distance, time and pace
- Cadence (provides real-time number of steps per minute)
Activity Profiles
- Gym
- Indoor Rowing
- Swim
- Pool Swimming, Open Water Swimming
- Cycling
- Biking, Indoor Biking
- Outdoor recreation
- Hiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Jumpmaster, Tactical
Swimming Features
- Pool swim workouts
- Drill logging (pool swim only)
- "Repeat on" rest timer (pool swim only)
- Basic rest timer (up from 0) (pool swim only)
- Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
- Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
- Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)
- Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)
- yes (with HRM-Tri™ and HRM-Swim™)
Tactical Features
- Dual grid coordinates
Outdoor Recreation
- Tides
- yes (via Connect IQ™)
- TracBack®
- Sight 'N Go
- Back to start
- Fish forecast
- yes (via Connect IQ™)
- UltraTrac mode
- Vertical speed
- GPS coordinates
- Area calculation
- yes (via Connect IQ™)
- Elevation profile
- Projected waypoint
- Total ascent/descent
- Distance to destination
- Sun and moon information
- yes (via Connect IQ™)
- Point-to-point navigation
- Bread crumb trail in real time
- Barometric trend indicator with Storm Alert
Daily Smart Features
- Calendar
- Connectivity
- Bluetooth® Smart, ANT+®, Wi-Fi®
- Find My Phone
- Find My Watch
- VIRB® Remote
- Weather forecasts
- Smart Notifications
- Smartphone compatibility
- iPhone®, Android™
- Controls smartphone music
- Pairs with Garmin Connect™ Mobile
- Connect IQ™ (downloadable watch faces, data fields and apps)
Activity Tracking Features
- TrueUp™
- Step counter
- Floors climbed
- Calories burned
- Distance traveled
- Intensity minutes
- Move alerts (displays on device after a period of inactivity)
- Auto goal (learns your activity level and assigns a daily step goal)
Health & Wellness Monitoring
- Sleep
Training, Planning and Analysis Features
- % HRR
- % HR max
- HR zones
- HR alerts
- Shortcuts
- Manual lap
- Auto max HR
- Auto scroll
- Finish time
- HR calories
- Voice alerts
- Custom alerts
- Recovery time
- VO2 Max (Run)
- Course guidance
- Training effect
- Virtual Partner
- Race an Activity
- Advanced workouts
- Interval training
- GPS speed and distance
- Configurable lap alerts
- Customizable data pages
- Touch and/or button lock
- Activity history on watch
- Downloadable training plans
- Manual multisport activities
- Customizable activity profiles
- Auto Pause® automatic timer halt
- Auto Lap® interval tracking feature
- HR broadcast (broadcasts HR data over ANT+® to paired devices)
- 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)
- yes (with compatible accessory)
Alternatives to the fēnix® 3 HR
Watches that cover a similar amount of wrist, with the measurements that separate them.
Garmin
Fenix 9 Pro inReach 51mm
- Width
- 51mm
- Thick
- 15.8mm
- Weight
- 99g
Garmin
Fenix 9 Pro inReach Solar 51mm
- Width
- 51mm
- Thick
- 16.6mm
- Weight
- 102g
Garmin
Fenix 9 Pro 51mm
- Width
- 51mm
- Thick
- 15.8mm
- Weight
- 99g
Garmin
Fenix 9 Pro Solar 51mm
- Width
- 51mm
- Thick
- 16.6mm
- Weight
- 102g
Garmin
Fenix 9 51mm
- Width
- 51mm
- Thick
- 14.7mm
- Weight
- 91g
Garmin
D2 Mach 2 Pro
- Width
- 51mm
- Thick
- 16.5mm
- Weight
- 90g
fēnix® 3 HR — Frequently Asked Questions
Will the Garmin Fenix 3 HR fit my wrist?
The Garmin Fenix 3 HR looks balanced on flat wrist widths of roughly 54–73mm (about 14.4–19.5cm circumference). Drag the slider above to check it against your own measurement.
What size band does the Garmin Fenix 3 HR take?
26mm. Any 26mm strap fits, so you are not limited to Garmin's own bands — look for a quick-release fitting if you want to swap without tools.
How long does the Garmin Fenix 3 HR battery last?
Garmin rates it at 40 hours per charge in everyday use.
How does the Garmin Fenix 3 HR battery compare with other Garmin watches?
At 14 days in everyday use it ranks #151 of the 285 Garmin watches in our database — below the middle of the range. The full ranking, including GPS and power-saving figures, is on our Garmin battery life comparison.
Is the Garmin Fenix 3 HR thick for a 51mm watch?
At 17.5mm, thicker than 81% of 51mm watches — it will sit noticeably high on the wrist. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
What other watches are the same size as the Garmin Fenix 3 HR?
Huawei Watch D, Omega Seamaster Chrono-Quartz, Tissot Lepine Mechanical all sit within half a millimetre of the Garmin Fenix 3 HR's 51mm case, so they cover the same amount of wrist.
