WatchFitTool
Garmin fēnix® 3 — case dimensions and design

Garmin

fēnix® 3Size, Dimensions & Wrist Fit

Case Width

51mm

Thickness

15.5mm

Battery

50 hours

Weight

82g

The Garmin fēnix® 3 sits best on flat wrist widths of about 5473mm (≈ 14.419.5cm wrist circumference). Adjust the slider below to check your wrist.

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The fēnix® 3 in short

The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.

  • Rated for 50 hours of use per charge.
  • 82g on the wrist. Lighter than 85% 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 fēnix® 3 fit your wrist?

Drag the slider to your wrist width and see the fēnix® 3 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. Bulky is fine — overhang is not.

mm
40.0mm (small)80.0mm (large)
How to Measure
1

Lay arm flat, palm up.

2

Measure the flat width across top of wrist.

Garmin fēnix® 3
010-01338-00
Case: 51mmL2L: 51mmThick: 15.5mm
Edge Clearance
+2mm
Sweet Spot2mm clearance. Perfect for sports watches - bold presence, no overhang.

Happy with the fit? Check current availability for the fēnix® 3.

Check offer

2D Dimension Schematics

The fēnix® 3 drawn to scale — from above, and in profile against the wrist.

Highlight
From above — true scale
From the side — how far it sits off the wrist
  • Garmin fēnix® 351mm · 15.5mm thick

3D preview

Garmin fēnix® 3 on a wrist

On an arm sized to your own wrist — the view a product photo never gives you.

Open 3D try-on

Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.

fēnix® 3 battery life

The runtime the manufacturer publishes for everyday use.

  • Smartwatch50 hours

How the fēnix® 3 ranks on battery

Against the 268 Garmin watches in our database, ranked on each figure Garmin publishes.

  • Everyday use14 days#116 of 257
  • GPS tracking20 hours#149 of 233
See all 268 Garmin watches ranked by battery life

What size band does the fēnix® 3 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 specifications

The figures that decide a purchase, followed by every line Garmin publishes.

Battery life
Smartwatch mode: Up to 2 weeksGPS mode: Up to 20 hoursUltraTrac™ mode: Up to 50 hours
Display
1.2” (30.4 mm) diameter
Resolution
218 x 218 pixels
Case material
fiber-reinforced polymer
Bezel
stainless steel
Glass
domed glass
Strap
TPU
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 20 hoursUltraTrac™ mode: Up to 50 hours
Display Size
1.2” (30.4 mm) diameter
Case material
fiber-reinforced polymer
Color display
Lens Material
domed glass
Bezel Material
stainless steel
Memory/History
32 MB
Strap material
TPU
Display resolution
218 x 218 pixels
QuickFit® watch band compatible
yes (26 mm)

Sensors

GPS
Compass
GLONASS
Thermometer
Accelerometer
Barometric altimeter

Product Info

Main SKU
010-01338-00
Product ID
160512
Product Name
fēnix® 3
Product Variation
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, Triathlon
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
Hydration
yes (in Garmin Connect™)
Women's health
yes (in Garmin Connect™)

Training, Planning and Analysis Features

% HRR
yes (with compatible accessory)
% HR max
yes (with compatible accessory)
HR zones
yes (with compatible accessory)
HR alerts
yes (with compatible accessory)
Shortcuts
Manual lap
Auto max HR
yes (with compatible accessory)
Auto scroll
Finish time
HR calories
yes (with compatible accessory)
Voice alerts
Custom alerts
Recovery time
yes (with compatible accessory)
VO2 Max (Run)
yes (with compatible accessory)
Course guidance
Training effect
yes (with compatible accessory)
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
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)

fēnix® 3 — Frequently Asked Questions

Will the Garmin fēnix® 3 fit my wrist?

The Garmin fēnix® 3 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 fēnix® 3 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 fēnix® 3 battery last?

Garmin rates it at 50 hours per charge in everyday use.

How does the Garmin fēnix® 3 battery compare with other Garmin watches?

At 14 days in everyday use it ranks #116 of the 257 Garmin watches in our database — the top 45% of the range. The full ranking, including GPS and power-saving figures, is on our Garmin battery life comparison.

Is the Garmin fēnix® 3 thick for a 51mm watch?

At 15.5mm, thicker than 65% 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 fēnix® 3?

Huawei Watch D, Omega Seamaster Chrono-Quartz, Tissot Lepine Mechanical all sit within half a millimetre of the Garmin fēnix® 3's 51mm case, so they cover the same amount of wrist.