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Watch comparison

Samsung Galaxy 9 40mm vs Samsung Galaxy 9 44mm

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Samsung Galaxy Watch 9 40mm

Samsung Galaxy Watch 9 40mm

  • Screen: 44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels.
  • Qualcomm Snapdragon Wear Elite, 3 nm processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs Wear OS 7; One UI 9 Watch.
KSh 39,500In Stock
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02
Samsung Galaxy Watch 9 44mm

Samsung Galaxy Watch 9 44mm

  • Screen: 44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels.
  • Qualcomm Snapdragon Wear Elite, 3 nm processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs Wear OS 7; One UI 9 Watch.
KSh 42,000In Stock
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2 spaces available

OnePlus Watch 4KSh 38,500
Samsung Galaxy Watch UltraKSh 45,000
Google Pixel Watch 3KSh 37,500
Samsung Galaxy Watch 8 ClassicKSh 38,500
Samsung Galaxy Watch Ultra 2025KSh 44,000
Amazfit Balance 2KSh 39,000
Google Pixel Watch 5 41mmKSh 42,000
2 of 4 products

Our quick verdict

With the same 1.47-inch OLED screen, Qualcomm Snapdragon Wear Elite processor and 2 GB of RAM, the Samsung Galaxy Watch 9 40mm is the better buy: it is lighter to wear all day.

Key differences

The main differences to help you choose.

Samsung Galaxy Watch 9 40mm

  • Lighter: 31.5 g (vs 34 g).
  • Lower price: KSh 39,500 (vs KSh 42,000).

Samsung Galaxy Watch 9 44mm

  • 1.47-inch OLED display.
  • Qualcomm Snapdragon Wear Elite processor.
  • 2 GB RAM.
  • 32 GB storage.

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

6 priorities selected.
How each product answers the selected priorities
PrioritySamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Battery lifeUp to 30 hours per chargeUp to 30 hours per charge
Storage32 GB storage32 GB storage
Display1.47-inch OLED display1.47-inch OLED display
PerformanceQualcomm Snapdragon Wear Elite processorQualcomm Snapdragon Wear Elite processor
Memory2 GB RAM2 GB RAM
SoftwareWear OS 7Wear OS 7

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Display44 mm: 1.47-inch Super AMOLED; 40 mm: 1.34-inch Super AMOLED44 mm: 1.47-inch Super AMOLED; 40 mm: 1.34-inch Super AMOLED
Screen resolution44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels
Display protectionSapphire crystalSapphire crystal
Display features3000 nits (peak)3000 nits (peak)

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Network / cellularGSM / HSPA / LTEGSM / HSPA / LTE
SIM / eSIMeSIMeSIM
Wi-FiWi-Fi 2.4 GHz + 5 GHzWi-Fi 2.4 GHz + 5 GHz
BluetoothBluetooth 5.3Bluetooth 5.3
NFCSupportedSupported
Positioning / GNSSDual-frequency GPS, L1 + L5Dual-frequency GPS, L1 + L5

Identity & design

Identity & design specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
BrandSamsungSamsung
ModelSamsung Galaxy Watch 9 (40 mm and 44 mm configurations)Samsung Galaxy Watch 9 (40 mm and 44 mm configurations)
Announced2026, July 222026, July 22
Dimensions44 mm: 46.0 × 43.7 × 8.6 mm; 40 mm: 42.7 × 40.4 × 8.6 mm44 mm: 46.0 × 43.7 × 8.6 mm; 40 mm: 42.7 × 40.4 × 8.6 mm
Weight44 mm: 34.0 g; 40 mm: 31.5 g, without band44 mm: 34.0 g; 40 mm: 31.5 g, without band
Build materialsAluminum caseAluminum case
Strap / bandLightweight breathable Sport Band with Dynamic Lug SystemLightweight breathable Sport Band with Dynamic Lug System
Controls / buttonsTouchscreen and two side buttonsTouchscreen and two side buttons

Performance & software

Performance & software specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
ProcessorQualcomm Snapdragon Wear Elite, 3 nmQualcomm Snapdragon Wear Elite, 3 nm
CPU5-core5-core
RAM2 GB2 GB
Storage32 GB32 GB
Operating systemWear OS 7; One UI 9 WatchWear OS 7; One UI 9 Watch

Audio & communication

Audio & communication specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphone; standalone calling on LTE editionsBluetooth calling with a connected smartphone; standalone calling on LTE editions

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
SensorsSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensorSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensor
Health & wellness featuresHeart rate; SpO₂; ECG; body composition; temperature; stress; Vitals; Heart Health ScoreHeart rate; SpO₂; ECG; body composition; temperature; stress; Vitals; Heart Health Score
Sleep trackingSleep-stage tracking; sleep-apnea risk detection; sleep VitalsSleep-stage tracking; sleep-apnea risk detection; sleep Vitals
Sports / workout modesAutomatic and manual workout tracking across running, walking, cycling, swimming and other activitiesAutomatic and manual workout tracking across running, walking, cycling, swimming and other activities
Training & outdoor featuresDaily Cardio Load; Fitness Index; workout and recovery guidanceDaily Cardio Load; Fitness Index; workout and recovery guidance
Safety & emergency featuresFall detection and Emergency SOSFall detection and Emergency SOS

Battery & durability

Battery & durability specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Battery capacity44 mm: 445 mAh; 40 mm: 390 mAh44 mm: 445 mAh; 40 mm: 390 mAh
Battery lifeUp to 30 hours with AOD onUp to 30 hours with AOD on
ChargingFast wireless charging, WPC-basedFast wireless charging, WPC-based
Water resistance5 ATM; IP685 ATM; IP68
Durability / certificationsMIL-STD-810HMIL-STD-810H

Compatibility

Compatibility specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Phone compatibilityAndroid 13.0 or later; more than 1.5 GB RAM; Google Mobile ServicesAndroid 13.0 or later; more than 1.5 GB RAM; Google Mobile Services
Companion appGalaxy Wearable; Samsung HealthGalaxy Wearable; Samsung Health
Colors44 mm: Graphite, Silver; 40 mm: Graphite, Cream44 mm: Graphite, Silver; 40 mm: Graphite, Cream

Additional specifications

Additional specifications specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mm
Case materialAluminumAluminum
Peak brightness3,000 nits peak3,000 nits peak
Charging time44 mm: 100% in 90 minutes, 45% in 30 minutes; 40 mm: 100% in 80 minutes, 50% in 30 minutes44 mm: 100% in 90 minutes, 45% in 30 minutes; 40 mm: 100% in 80 minutes, 50% in 30 minutes
Release statusAvailable. Released 2026, August 07Available. Released 2026, August 07
Model numbersSM-L340, SM-L350, SM-L345F, SM-L355F, SM-L345U, SM-L355USM-L340, SM-L350, SM-L345F, SM-L355F, SM-L345U, SM-L355U
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 2100HSDPA 850 / 900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66, 711, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66, 71
Network speedHSPA, LTEHSPA, LTE
SAR (US)1.06 W/kg (body)1.06 W/kg (body)
SAR (EU)0.70 W/kg (body)0.70 W/kg (body)
Additional durability featuresArmor Aluminum 2Armor Aluminum 2

Similarities

  • Both have 2 GB RAM.
  • Both are rated IP68.
  • Both have NFC.
  • Both have an aluminium case.
  • Both take ECG readings.
  • Both are water resistant to 50 m.

In summary

The Samsung Galaxy Watch 9 40mm is the better buy for almost everyone, with a lighter watch for all-day wear.

Back to compared products ↑

In-stock alternatives

Amazfit Balance 2For Samsung Galaxy Watch 9 40mmAmazfit Balance 2View product ↗Samsung Galaxy Watch 8 ClassicFor Samsung Galaxy Watch 9 40mmSamsung Galaxy Watch 8 ClassicView product ↗Samsung Galaxy Watch Ultra 2025For Samsung Galaxy Watch 9 44mmSamsung Galaxy Watch Ultra 2025View product ↗Google Pixel Watch 4For Samsung Galaxy Watch 9 44mmGoogle Pixel Watch 4View product ↗

Related comparisons

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