Garmin Fenix 8 47mm AMOLED vs Instinct 3 50mm AMOLED

Size, specs & wrist fit compared

Garmin Fenix 8 47mm AMOLED Part 010-02904-10

Garmin Instinct 3 50mm AMOLED Part 010-03020-00

Which one fits you

Under 18 cm (7.1 in) round, the Instinct 3 50mm AMOLED's lugs overhang and the Fenix 8 47mm AMOLED's do not; the Fenix 8 47mm AMOLED fills the wrist at 17.5–19.5 cm, the Instinct 3 50mm AMOLED at 19–21 cm.

What else differs

Screen: the Fenix 8 47mm AMOLED has the larger screen, 1.4 in across against 1.3 in on the Instinct 3 50mm AMOLED.
Battery: 24 days for the Instinct 3 50mm AMOLED against 16 days for the Fenix 8 47mm AMOLED in everyday use; 47 hours for the Fenix 8 47mm AMOLED against 40 hours for the Instinct 3 50mm AMOLED with GPS on.

The Instinct 3 50mm AMOLED is 3mm wider, 0.6mm thicker and 21g lighter than the Fenix 8 47mm AMOLED.

Fenix 8 47mm AMOLED

Instinct 3 50mm AMOLED

Case width

47mm

50mm+3mm

Thickness

13.8mm

14.4mm+0.6mm

Weight

80g

59g−21g

Fenix 8 47mm AMOLED or Instinct 3 50mm AMOLED by wrist size

Wrist round (mm left each side)	Fenix 8 47mm AMOLED≈54mm lug to lug, est.	Instinct 3 50mm AMOLED≈57.5mm lug to lug, est.
14 cm / 5.5 in	Overhangs (4.4mm over)	Overhangs (6.2mm over)
15 cm / 5.9 in	Overhangs (2.8mm over)	Overhangs (4.6mm over)
16 cm / 6.3 in	Overhangs (1.2mm over)	Overhangs (2.9mm over)
17 cm / 6.7 in	Bold (0.4mm)	Overhangs (1.3mm over)
18 cm / 7.1 in	Sweet spot (2mm)	Bold (0.3mm)
19 cm / 7.5 in	Sweet spot (3.6mm)	Sweet spot (1.9mm)
20 cm / 7.9 in	Balanced (5.3mm)	Sweet spot (3.5mm)

How the fit model works · Size chart for every wrist

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Garmin

Fenix 8 47mm AMOLED

Garmin

Instinct 3 50mm AMOLED

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Battery life compared

Fenix 8 47mm AMOLEDInstinct 3 50mm AMOLED

Battery saver
23 days
30 days
Smartwatch
16 days
24 days
Expedition
17 days
20 days
Max battery GPS
81 hours
86 hours
GPS only
47 hours
40 hours
All systems
38 hours
32 hours
All systems + multi-band
35 hours
30 hours
All systems with music
10 hours
—

More comparisons

Garmin Fenix 8 47mm AMOLED vs Garmin Forerunner 570 47mm Garmin Fenix 8 47mm AMOLED vs Garmin Venu 4 45mm Garmin Forerunner 970 vs Garmin Instinct 3 50mm AMOLED Garmin Enduro 3 vs Garmin Instinct 3 50mm AMOLED

2D Dimension Schematics

Top view

Side view

Garmin Fenix 8 47mm AMOLED 47mm × ≈54mm (est.) · 13.8mm thick
Garmin Instinct 3 50mm AMOLED 50mm × ≈57.5mm (est.) · 14.4mm thick

Full specs: Garmin Fenix 8 47mm AMOLED Full specs: Garmin Instinct 3 50mm AMOLED

3D preview

Fenix 8 47mm AMOLED vs Instinct 3 50mm AMOLED on a wrist

Open 3D try-on

Specifications

The short version

7 key specs

Spec	GarminFenix 8 47mm AMOLED	GarminInstinct 3 50mm AMOLED
Case Width	47mm	50mm
Thickness	13.8mm	14.4mm
Weight	80g	59g
Shape	Circular	Circular
Display type	AMOLED	AMOLED (always-on)
Battery life	Smartwatch: Up to 16 days (7 days always-on) Battery Saver Watch Mode: Up to 23 days GPS Only: Up to 47 hours (37 hours always-on) All Satellite Systems: Up to 38 hours (30 hours always-on) All Satellite Systems + Multi-band: Up to 35 hours (28 hours always-on)* All Satellite Systems + Music: Up to 10 hours Max Battery GPS: Up to 81 hours Expedition GPS: Up to 17 days *Assuming typical use with SatIQ technology	Smartwatch: Up to 24 days (9 days always-on) Battery Saver Watch Mode: Up to 30 days GPS Only: Up to 40 hours All Satellite Systems: Up to 32 hours All Satellite Systems + Multi-Band: Up to 30 hours* Max Battery GPS: Up to 86 hours Expedition GPS: Up to 20 days *assuming typical use with SatIQ technology
Released	2024	2025

Where the specifications differ

25 differences

Spec	Garmin Fenix 8 47mm AMOLED	Garmin Instinct 3 50mm AMOLED
General
Battery life	Smartwatch: Up to 16 days (7 days always-on) Battery Saver Watch Mode: Up to 23 days GPS Only: Up to 47 hours (37 hours always-on) All Satellite Systems: Up to 38 hours (30 hours always-on) All Satellite Systems + Multi-band: Up to 35 hours (28 hours always-on)* All Satellite Systems + Music: Up to 10 hours Max Battery GPS: Up to 81 hours Expedition GPS: Up to 17 days *Assuming typical use with SatIQ technology	Smartwatch: Up to 24 days (9 days always-on) Battery Saver Watch Mode: Up to 30 days GPS Only: Up to 40 hours All Satellite Systems: Up to 32 hours All Satellite Systems + Multi-Band: Up to 30 hours* Max Battery GPS: Up to 86 hours Expedition GPS: Up to 20 days *assuming typical use with SatIQ technology
Display Size	1.4” (35.56 mm) diameter	1.3" (33 mm) diameter
Case material	fiber-reinforced polymer with metal rear cover	fiber-reinforced polymer
Lens Material	Corning® Gorilla® Glass or sapphire crystal	Chemically Strengthened Glass
Bezel Material	stainless steel or titanium	fiber-reinforced polymer/aluminum
Memory/History	32 GB	4 GB
Display resolution	454 x 454 pixels	416 x 416 pixels
QuickFit® watch band compatible	included (22 mm)	yes (26 mm)
Product Info
Main SKU	010-02904-10	010-03020-00
Product ID	1228429	1622337
Product Name	fēnix® 8 – 47 mm, AMOLED	Instinct® 3 – 50 mm, AMOLED
Release Date	8/27/2024	1/6/2025
Product Variation	Sapphire, Titanium with Spark Orange/Graphite Silicone Band	Black with Charcoal Band
Cycling Features
FTP (Functional Threshold Power)	yes (with compatible accessory)	Yes
Golfing Features
Measures shot distance (calculates exact yardage for shots from anywhere on course)	automatic	manual
What You'll Love
Display type	AMOLED	AMOLED (always-on)
Battery life (smartwatch mode)	Up to 16 days (7 days always-on)	Up to 24 days (9 days always-on)
Activity Profiles
Gym	Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Jump Roping	Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing
Multisport	Swimming/Running, Triathlon	Triathlon
On the Water	Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater	Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Water Skiing, Snorkeling, Wakeboarding, Wakesurfing, Tubing, Whitewater
Outdoor running	Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing	Running, Outdoor Track Running, Trail Running, Obstacle Racing
Other activity profiles	Inline Skating	Tactical, Inline Skating
Swimming Features
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, HRM-Swim, HRM-Pro or HRM-Pro Plus)	Yes
Outdoor Recreation
Area calculation	yes (via Connect IQ™)	Yes
Daily Smart Features
Connectivity	Bluetooth®, ANT+®, Wi-Fi®	Bluetooth®, ANT+®

The other 223 specifications both list are identical.

Full Garmin Fenix 8 47mm AMOLED specifications →Full Garmin Instinct 3 50mm AMOLED specifications →

Fenix 8 47mm AMOLED specs →Instinct 3 50mm AMOLED specs →Compare more watches →