Google Pixel Watch 4 Specifications

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Google Pixel Watch 4

GPS smartwatch: 41mm, 45mm.

RRP $349

£349, €399

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Expert opinion

The Pixel Watch 4 is the first Pixel Watch that does not ask you to forgive anything. Bright enough to read in direct sun, two days of battery rather than one, and fifteen minutes on the charger covers most of a day. That removes the daily friction that made earlier Pixel Watches tiring to own.

Sport tracking is competent. GPS is accurate enough for anyone not comparing traces against a chest strap. Heart rate holds up outside high-intensity intervals. Gemini answers most questions well, needs a connection to do so, and still bounces you into the app for anything about your own training.

You can replace the battery and screen yourself, which nothing else at this price allows. The deeper training insights need a subscription. The domed glass sits proud of the case and will collect scratches.

For an Android phone owner who trains recreationally, this is the one. Anyone racing, using power meters, or needing more than two days between charges should buy a sports watch.

What’s new versus Pixel Watch 3

Dual-frequency GNSS (GPS, Galileo, GLONASS)
Snapdragon W5 Gen 2 processor, 25% faster and 50% less power than the W5 Gen 1
3,000 nit peak brightness, up from 2,000 nits
10% larger display and 16% smaller bezel
45mm battery increased to 455mAh, battery life up 25%
Fast charging: 0-50% in 15 minutes
Satellite SOS on LTE models, the first standalone implementation on a smartwatch
User-replaceable battery and display
More accurate skin temperature sensor
Cortex-M55 co-processor added
15% stronger haptics, improved speaker volume, water ejection
AI workout detection
Wear OS 6.0 with Material 3 UI and Gemini integration
18% more accurate sleep stage detection
New sport profiles: American Football, Badminton, Baseball, Basketball, Cricket, Field Hockey, Soccer, Outdoor Swimming, Padel, Pickleball, Pool Swim, Rugby

Specifications

Feature	41mm	45mm
Case diameter	41mm	45mm
Height	12.3mm	12.3mm
Weight (without band)	31.0g	36.7g
Case material	100% recycled aluminium	100% recycled aluminium
Display	Actua 360, 320ppi AMOLED LTPO, 3000 nits peak, 1 nit AOD, 1-60Hz, Gorilla Glass 5	Identical
Processor	Qualcomm Snapdragon W5 Gen 2 + Cortex-M55 co-processor	Identical
Storage and memory	32GB eMMC, 2GB SDRAM	32GB eMMC, 2GB SDRAM
OS	Wear OS 6.0 at launch, updated to Wear OS 7	Wear OS 6.0 at launch, updated to Wear OS 7
GPS	Dual-frequency: GPS, Galileo, GLONASS	Identical
GPS score (the5krunner)	83%	83%
Connectivity	Bluetooth 6.0, Wi-Fi 6 (2.4/5GHz), NFC, UWB, 4G LTE (LTE models), Satellite SOS (LTE models only)	Identical
Sensors	Optical HR (multi-path), ECG, SpO2, cEDA (skin conductance), skin temperature, barometer, altimeter, compass, magnetometer, gyroscope, accelerometer, ambient light	Identical
Interaction	Side button, haptic crown, Gen 3 Premium haptics. Double-pinch and wrist-turn gestures added in Wear OS 6.1	Identical
Water resistance	5ATM, IP68	5ATM, IP68
Band (included)	Active Band, fluoroelastomer, S+L sizes	Active Band, fluoroelastomer, S+L sizes
Band fit	Small 130-175mm, large 165-210mm	Small 150-185mm, large 165-215mm
Android compatibility	Android 11.0 or newer (not Android Go)	Identical
Warranty	One year	One year
Accessibility	TalkBack screen reader, Magnifier, real-time text	Identical
Security updates	3 years from US launch	3 years from US launch
Repairability	User-replaceable battery and display	Identical
© the5krunner. Link required.
In box	Watch, Active Band (S+L), Quick Charge Dock	Identical
Announced	20 August 2025	20 August 2025
On sale	9 October 2025	9 October 2025
Predecessor	Pixel Watch 3 (September 2024)	Pixel Watch 3 (September 2024)
Successor	Pixel Watch 5 (August 2026)	Pixel Watch 5 (August 2026)
UK price at launch (Wi-Fi / LTE)	£349 / £449	£399 / £499
UK price current (Wi-Fi)	£249	£249
US price at launch (Wi-Fi / LTE)	$349 / $449	$399 / $499

Battery life

Mode	41mm	45mm
Always-on display	Up to 30 hours	Up to 40 hours
Battery Saver	Up to 48 hours	Up to 72 hours
Capacity	325mAh	455mAh
Charge to 50%	~15 minutes	~15 minutes
Charge to 80%	~25 minutes	~30 minutes
Charge to 100%	~45 minutes	~60 minutes
Tested (45mm, AOD)	–	Slightly exceeded 40 hours
© the5krunner. Link required.

Key features

GPS accuracy

Dual-frequency GNSS across GPS, Galileo and GLONASS. The Pixel Watch 4 scored 83% on the standard the5krunner GPS test course, placing it in the accurate-but-not-leading tier alongside Suunto and Amazfit dual-frequency devices. The current Garmin Synaptics and Apple Ultra implementations are marginally better. Cadence lock appeared in one treadmill session during testing. No cloud-based post-processing, which arrived with the Pixel Watch 5.

Optical heart rate

Multi-path optical sensor, broadly accurate in steady-state efforts. Cadence lock recorded in one test session. The Apple Watch Ultra 3 produced dropouts where the Pixel Watch recorded continuously, and neither platform was consistently superior across all test conditions. Deep sleep detection was the most accurate of three devices tested against the Apple Watch Ultra 3 and Eight Sleep Pod.

Gemini

Accessed via the side button. Handles conversational commands, smart home control, scheduling and factual queries. At the time of review, sports performance questions opened the Fitbit app rather than answering directly. Gemini coaching arrived later via Google Health Premium.

Wear OS 6.1 update

Added the double-pinch gesture, exclusive to the Pixel Watch 4 at launch: pinch index finger and thumb twice to scroll notifications, manage timers, snooze alarms and control media. A wrist-turn gesture dismisses calls and notifications. Smart replies run twice as fast on-device. Delivered in the March 2026 Pixel Drop.

Running and training

Google says the Pixel Watch 4 tracks more than 50 exercises, and AI workout detection is built in. Custom runs give real-time guidance, form metrics and performance insights. Cardio Load balances training against recovery, and readiness guidance draws on sleep, resting heart rate and heart rate variability. Google lists step-by-step workouts as rolling out now to the Pixel Watch 3 and newer.

Health and recovery

Sleep is tracked in light, deep and REM stages, and Morning Brief gives a Sleep Score, readiness and the weather when you wake. The ECG app checks for atrial fibrillation, irregular rhythm notifications and resting heart rate range alerts warn you about unusual readings, and health trends cover breathing rate, SpO2, resting heart rate, skin temperature and heart rate variability. The stress score and body response feature use the skin conductance sensor. Blood pressure trends, insulin resistance trends and sleep breathing quality trends went live on 24 September 2026 and are free on this watch. Breathing Emergency Detection is on the Pixel Watch 4 and 5, in the EU only. Google Health Coach, the AI coaching feature, needs a Premium subscription.

More safety features

Loss of Pulse Detection can call emergency services if it detects a loss of pulse and you do not respond. Safety Check shares your location with emergency contacts if a timer runs out, and Car Crash Detection can dial emergency services after a severe crash. The watch buzzes if you leave your phone behind, and it signals the phone to lock when the Bluetooth connection drops.

Smart features

AI call screening picks up and holds calls and spots spam, smart replies write responses in your style, and voice recordings are turned into text. The Pixel Camera app on the watch switches between photo and video and has Astro mode, and the one-handed double pinch starts a photo countdown. Nest doorbell alerts tell people, packages, animals and vehicles apart, and you can control a Google TV Streamer and play audio on Nest Hub and speakers. Backup and Restore through Google One and Transfer Watch, which arrived with Wear OS 6.0, make moving to a new phone easier. Google’s November 2026 Pixel Drop lists proactive suggestions, custom widgets and a Call Screen upgrade as coming soon for this watch.

Phone and connectivity

The LTE model shares your phone number for calls, texts and music without the phone nearby, and the Bluetooth and Wi-Fi model needs your phone or a Wi-Fi connection. Calls can use the built-in speaker and microphone or paired Pixel Buds. It works with Android phones running Android 11 or newer, not only Pixel.

Satellite SOS

Off-grid emergency communication via satellite, available on LTE models only. Included free for 2 years from launch. Extended to Canada, Europe, Alaska and Hawaii in the March 2026 update.

Activities

Around 40 tracked activities via the Google Health app, formerly Fitbit. GPS-tracked activities include running, outdoor cycling, hiking and walking. Pool and open water swimming are tracked without GPS. Other profiles include HIIT, strength training, yoga, Pilates, elliptical, rowing, basketball, pickleball, badminton, baseball, American football, field hockey, soccer, cricket, rugby, padel and general sport. Multi-sport mode for triathlon is not supported.

Google Pixel Watch 4 software updates

The current Google Pixel Watch 4 software is CP3A.260905.002. Google is still updating the Pixel Watch 4, with 3 software releases since March 2026. This section is updated when Google releases a new version.

Current version	CP3A.260905.002, released 15 September 2026.
Last update	CP3A.260905.002 on 15 September 2026.

Features added since March 2026

CP3A.260905.002, 15 September 2026. Double pinch now works in more places (At a Glance, notifications, Gemini replies, Wallet, workout metrics, Google Maps and Recorder), a wrist turn goes back, plus Gemini personalisation, Raise to Talk improvements and bug fixes.
CP2A.260603.001.S1 (Bluetooth) and CP2A.260603.001 (LTE), 16 June 2026. Wear OS 7, with more accurate Raise to Talk for Gemini, remote media routing, Wear Contacts changes and a three-button layout in Messages.
CP1A.260305.014.W2 (Bluetooth) and CP1A.260305.014.W4 (LTE), 3 March 2026. Express pay, Find Hub on the watch, standalone earthquake alerts, satellite SOS in more regions, alerts when you leave your phone behind and an option to lock the phone when the watch disconnects.

Full version history, 3 releases including betas and fixes

Version	Type	Date	What changed
CP3A.260905.002	Stable	15 September 2026	Double pinch now works in more places (At a Glance, notifications, Gemini replies, Wallet, workout metrics, Google Maps and Recorder), a wrist turn goes back, plus Gemini personalisation, Raise to Talk improvements and bug fixes.
CP2A.260603.001.S1 (Bluetooth) and CP2A.260603.001 (LTE)	Stable	16 June 2026	Wear OS 7, with more accurate Raise to Talk for Gemini, remote media routing, Wear Contacts changes and a three-button layout in Messages.
CP1A.260305.014.W2 (Bluetooth) and CP1A.260305.014.W4 (LTE)	Stable	3 March 2026	Express pay, Find Hub on the watch, standalone earthquake alerts, satellite SOS in more regions, alerts when you leave your phone behind and an option to lock the phone when the watch disconnects.

Version history is recorded from March 2026. See also known problems and fixes and Google’s release notes for the current version.

Quick answers

When was the Google Pixel Watch 4 released?
Google announced the Pixel Watch 4 on 20 August 2025, and it went on sale on 9 October 2025. Launch prices started at GBP 349 or USD 349 for the 41mm Wi-Fi model.

Is the Pixel Watch 4 waterproof?
Pixel Watch 4 has a 5 ATM water rating and an IP68 rating. Pool and open water swimming are tracked, without GPS.

What sizes does the Pixel Watch 4 come in?
Pixel Watch 4 comes in 41mm and 45mm sizes, both 12.3mm high. The 41mm weighs 31.0g and the 45mm weighs 36.7g without the band.

What is the Pixel Watch 4 battery life?
Google quotes up to 30 hours on the 41mm and up to 40 hours on the 45mm with the always-on display. Battery Saver extends this to 48 and 72 hours, and a 15-minute charge reaches about 50 per cent.

Does the Pixel Watch 4 have LTE?
Yes, the LTE models of Pixel Watch 4 have 4G LTE and Satellite SOS, which is included free for two years from launch.

Does the Pixel Watch 4 support triathlon?
No, Pixel Watch 4 does not support a multi-sport mode for triathlon.

Explore the full resource library

This site covers endurance sport technology across a range of dedicated reference sections. Each one collects the most relevant articles, tests, and analysis on its topic in one place.

Buyer guides

Best sports watch: tested recommendations by sport and athlete type (triathlon, running, marathon, cycling, hiking, and women)
Best Garmin watch: Forerunner versus Fenix by series, sport, and budget
Best wearables: fitness trackers, recovery trackers, heart rate monitors, running power meters, and female athlete tech
Best cycling products: computers, smart trainers, indoor cycling apps, power meters, and cycling heart rate monitors
Buying guides: every upgrade guide and product comparison in one place, by brand, for owners deciding whether to move to the newest model
Gear I use: the watches, bikes, sensors, fuel and sleep kit tfk actually trains and races with, and what his partner uses

Brand and product guides

Amazfit: the full Amazfit range from Balance to Cheetah to T-Rex, accuracy tests, HYROX partnership, and Zepp Health analysis
Apple Watch: athlete-first coverage of Apple Watch across running, cycling, and triathlon
COROS: watches, features, and firmware across the full COROS range
Garmin: the company, the platform and the full range, and the starting point for choosing across every Garmin product line
Garmin Edge: bike computers from entry-level navigation to flagship endurance and mountain biking
Bike computers: Garmin, Wahoo, Hammerhead, COROS and the value brands compared
Bryton: the Rider range compared, from basic GPS units to the S810 with maps
Garmin Fenix: every model, feature, and firmware development for Garmin's flagship outdoor watch
Garmin Fenix 8 Series: which variant to buy, upgrade advice, accuracy data, and the full Fenix 8 review and firmware coverage
Garmin Forerunner: the full Forerunner line covered from entry level to triathlon flagship
Garmin Instinct: rugged GPS watches for endurance and adventure athletes
Garmin Features Explained: how Garmin's metrics work, from Training Load and Body Battery to Race Predictor and HRV Status
Garmin Connect IQ charts: the most popular watch faces, apps, data fields and music services on the Connect IQ Store, updated monthly
Google Fitbit: Fitbit Edge, Fitbit Air, Google Health, Pixel Watch and the Wear OS platform
Magene: which Magene bike computer to buy, from the C506 to the C706, with tested verdicts
Polar: watches, sensors, Polar Flow and training science across the full Polar range
Runna: coach-written running plans that adapt as you train
Suunto: Race, Vertical, Run and the SuuntoPlus ecosystem
Strava: features, privacy, segments, and how Strava fits into a serious training setup
Ride with GPS: route planning, navigation and how it works alongside Strava
Wahoo: KICKR trainers, ELEMNT bike computers, and the Wahoo ecosystem
WHOOP: strain, recovery, sleep and the full WHOOP ecosystem

Specifications database

Full Specifications Database: detailed spec sheets, battery life, sensor lists and generation-on-generation comparisons for current Garmin, COROS, Amazfit, Samsung, Google Fitbit, Huawei, Polar, Suunto, Wahoo and Apple Watch models

Glossary

Sports Technology Glossary: non-branded terminology across running, cycling, swimming, triathlon, hiking, strength training, HYROX, sensors, ecosystems, and brands

Sport and topic guides

Running Watches: how to choose by discipline (road racing, trail, track, beginner, and multisport)
Triathlon and Multisport Technology: watches, sensors, and race-day tools for swimmers, cyclists, and runners
HYROX: training science, race analysis, and technology for the functional fitness race format
parkrun: technology, training, and performance for the weekly 5K
Hiking Technology: navigation, safety, and trail tech for walkers and hikers
Heart Rate Monitoring: optical sensors, chest straps, accuracy comparisons, and how to set training zones
Optical Sensors (PPG): the 40 things a wrist optical sensor could measure, from heart rate to glucose, ranked by evidence
GPS Accuracy: how satellite systems perform across brands, terrains, and conditions
Sports Watch Battery Life: battery claims, real-world tests, and how to manage battery life across Garmin, Apple, Amazfit and COROS
Recovery Trackers: WHOOP, Oura, and the science of readiness scoring
Muscle Oxygen Sensors: SmO2 and NIRS explained, Train Red and Moxy compared, and the category from BSX and Humon to Garmin and WHOOP
Female Athlete Tech: wearables, physiology, and performance for female endurance athletes, covering cycle-synced training, RED-S, HR accuracy, and VO2max
Sports Science: peer-reviewed research on HRV, VO2max, lactate threshold, running power, wearable accuracy, and supplementation
Testing Methodology: how this site tests GPS accuracy, heart rate, battery life, and other performance claims

Content series

Release Radar: confirmed launches, leaks, and rumours across Garmin, Apple, COROS, Polar, Suunto, and Wahoo
Deep Dive Feature Files: weekly firmware feature updates across all brands (bug fixes excluded)
Fix Files: weekly firmware bug fix tracking across all brands

Small things I always use

Garmin 90-degree charging adapter: Charges your Garmin with any USB-C cable. Essential when travelling. I use one.
Body Glide: The blue anti-chafing stick swimmers and runners carry. I use it.
Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
Maurten: Race fuel that stays easy on the stomach. I use them.
Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
Garmin charging puck: The quickest way to top up before a session. I use one.
Injinji: Toe socks that stop rubbing, so you run more. I use them.
Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
Cellucor C4: My pre-workout before hard sessions.
TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
G8 insoles: Adjustable arches, perfect position. I use them.
Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.

Health, recovery and sleep

Kineon MOVE+: Red and infrared light for sore knees, Achilles and other joints after hard training. I use it.
FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet. Occasional use.
hDrop: Measures my sweat loss in summer and indoors. I use it.
Fourth Frontier Zone: Checks my heart under load in hard sessions.
Oura Ring 5: My partner’s recovery tracker of choice.
Eight Sleep: A cooling mattress cover my partner and I use nightly.

Watches and sensors

Polar H10: My daily driver for waking HRV.
Polar Verity Sense: My backup arm-worn HR sensor.
Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
Train.Red: The best muscle oxygen sensor I’ve used. Occasional use.
Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.

On the bike

Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions. I use both.
Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
Ravemen FR1000: The light and the computer mount in one unit, so nothing else goes on the bars. Better than mine.
Ravemen FR1500SE: 1,500 lumens hanging under your Garmin, for proper night rides.
Ravemen FR1100SE: 1,100 lumens under your Garmin, and up to 46 hours on slow flash.
Ravemen FR500: A brighter FR300 with the same mount.
Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.

Home and indoor training

NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
Google Wifi: Keeps Zwift connected in my pain cave. I use it.
Apple TV 4K: Zwift on the big screen. I use two.
Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home via Starling. I use it.

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