45 mm Case Size — 4 Smartwatches Compared

Decision table

45 mm Case Size: which one for what?

The 4 models on this page are scored only against each other, for the use you pick. Scores come from the spec sheets; no price and no advertising go in.

What will you use it for? Health Tracking Sport & Outdoors Battery Life Daily Use

Leads for Health Tracking: Google Pixel Watch 4 45mm77%

Leads for Sport & Outdoors: Garmin Instinct 3 AMOLED 45mm90%

Leads for Battery Life: Garmin Instinct 3 AMOLED 45mm76%

Leads for Daily Use: Google Pixel Watch 4 45mm69%

#3#2#2#3
Garmin Venu 4 45mmGarmin
45 mm · up to 96 hours · Yes
65% 79% 71% 55%
Why it ranks here
- ECG
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- 96 hours of battery
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
- Editorial tag: Battery Life
- 96 hours of battery
How long does the battery last?
Why it ranks here
- 45 mm case
#4#1#1#4
Garmin Instinct 3 AMOLED 45mmGarmin
45 mm · up to 168 hours · 10 ATM
57% 90% 76% 53%
Why it ranks here
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- 168 hours of battery
- Dual-band GNSS
- Water resistance to 100 m
Why it ranks here
- Editorial tag: Battery Life
- 168 hours of battery
How long does the battery last?
Why it ranks here
- 45 mm case
#2#4#4#2
Google Pixel Watch 5 45mmGoogle
45 mm · up to 40 hours · Yes
77% 58% 50% 69%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 45 mm case
#1#3#3#1
Google Pixel Watch 4 45mmGoogle
45 mm · up to 40 hours · Yes
77% 58% 50% 69%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 45 mm case