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Head to head

Google Google Pixel Watch 5 45mmvsGoogle Google Pixel Watch 4 45mm

Released
2026-08-20Google blog — Pixel Watch 5, retrieved 2026-09-13
Price
£399Google Store UK — Pixel Watch 5 45 mm, retrieved 2026-09-22
Security updates until
Not published by the makerGoogle Store UK — Pixel Watch 5 specs, retrieved 2026-09-13
Released
2025-10-09Google blog — Pixel Watch 4, retrieved 2026-09-13
Price
£399Google Store UK — Pixel Watch 4 45 mm, retrieved 2026-09-22
Security updates until
Not published by the makerGoogle Store UK — Pixel Watch 4 specs, retrieved 2026-09-13

0 wins for Google Pixel Watch 5 45mm0 wins for Google Pixel Watch 4 45mm0 differences you won’t noticeSame RRP

Verdict: nothing you’d notice between them

On the makers’ published figures, neither the Google Pixel Watch 5 45mm nor the Google Pixel Watch 4 45mm wins a row by a gap you would notice. Both state the same case size, weight (case only), peak brightness, battery life (maker's claim) and charge to 80%. The other 24 rows have no threshold or no direction to judge by, so nobody wins them.

True to scale

Google Pixel Watch 5 45mm · 45 × 45 mmGoogle Pixel Watch 4 45mm · 45 × 45 mm

Case outlines from each maker’s published dimensions, drawn to scale. A round case is an ellipse at those figures.

Specifications

A win is marked only where the figures can be ranked and the gap is one you could notice on the wrist. A row the site has no threshold for says whether the two differ, and that it is not ranking them. = marks the same figure on both, ≠ not ranked a difference with no ranking. Every figure carries its source.

Body

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
DimensionsSame.
45 x 45 x 12.3 mmOfficial
45 x 45 x 12.3 mmOfficial
Case sizeSame.
45mmOfficial
45mmOfficial
Case shapeSame.
roundOfficial
roundOfficial
Weight (case only)Same.
36.7gOfficial
36.7gOfficial
Case materialSame.
100% recycled aluminiumOfficial
100% recycled aluminiumOfficial
Water ratingSame.
5 ATM, IP68Official
5 ATM, IP68Official

Display

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
Display typeSame.
Actua 360 AMOLED LTPO display with DCI-P3 colour, Always-on displayOfficial
Actua 360 AMOLED LTPO display with DCI-P3 colour, Always-on displayOfficial
Peak brightnessSame.
3000nitsOfficial
3000nitsOfficial
Always-on displaySame.
YesOfficial
YesOfficial

Platform

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
Operating systemDiffers, but not ranked.
Wear OS 7.0Official
Wear OS 6.0Official
ChipDiffers, but not ranked.
Qualcomm Snapdragon W5 Gen 2 Accelerated, Cortex-M55 co-processorOfficial
Qualcomm Snapdragon W5 Gen 2, Cortex-M55 co-processorOfficial
StorageDiffers, but not ranked.
64GBOfficial
32GBOfficial
RAMDiffers, but not ranked.
3GB3rd party
2GB3rd party

Battery

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
Battery life (maker's claim)Same.
40hOfficial
40hOfficial
Battery capacityDiffers, but not ranked.
465mAh3rd party
455mAh3rd party
Charge to 80%Same.
30minOfficial
30minOfficial
ChargingSame.
Quick Charge DockOfficial
Quick Charge DockOfficial

Health

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
SensorsSame.
Compass, altimeter, red and infrared sensors for oxygen saturation (SpO2) monitoring, multipurpose electrical sensors compatible with ECG app, multi-path optical heart rate sensor, 3-axis accelerometer, gyroscope, ambient light sensor, electrical sensor to measure skin conductance (cEDA), far-field skin temperature sensor, barometer, magnetometerOfficial
Compass, altimeter, red and infrared sensors for oxygen saturation (SpO2) monitoring, multipurpose electrical sensors compatible with ECG app, multi-path optical heart rate sensor, 3-axis accelerometer, gyroscope, ambient light sensor, electrical sensor to measure skin conductance (cEDA), far-field skin temperature sensor, barometer, magnetometerOfficial
ECGSame.
YesOfficial
YesOfficial
Blood oxygenSame.
YesOfficial
YesOfficial
Skin temperatureSame.
YesOfficial
YesOfficial
GPSDiffers, but not ranked.
Dual Frequency GPS: GPS, Galileo, Glonass, Beidou, QZSSOfficial
Dual-frequency GPS: GPS, Galileo, GLONASSOfficial

Connectivity

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
Cellular modelSame.
YesOfficial
YesOfficial
UK networks with eSIMSame.
EE, Vodafone3rd party
EE, Vodafone3rd party
Wi-FiDiffers, but not ranked.
802.11a/b/g/n/ac/ax 2.4GHz, 5GHzOfficial
802.11a/b/g/n/ac/ax 2.4 GHz, 5 GHzOfficial
BluetoothSame.
6.0Official
6.0Official
NFC paymentsSame.
YesOfficial
YesOfficial

Compatibility

SpecificationGoogle Pixel Watch 5 45mmGoogle Pixel Watch 4 45mm
Works withDiffers, but not ranked.
Works with most phones running on Android 12.0 or newer. Requires a Google Account and the Google Pixel Watch app.Official
Works with most phones running on Android 11.0 or newer. Requires a Google Account and the Google Pixel Watch app.Official
CompatibilitySame.
Android; some features need a Google phoneOfficial
Android; some features need a Google phoneOfficial
6 attributes neither watch has a sourced figure for

Strap width · Display size · Display area · Resolution · Blood pressure · Cellular model price. Rows appear as sources are cited — a gap in our data, not a statement about either watch.

The pairs a buyer of either watch would also weigh. Any two watches in the catalogue can be compared from the chooser.