47 mm Case Size — 6 Smartwatches Compared

Decision table

47 mm Case Size: which one for what?

The 6 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: Galaxy Watch Ultra (2025)77%

Leads for Sport & Outdoors: Garmin Forerunner 97081%

Leads for Battery Life: Garmin Forerunner 97073%

Leads for Daily Use: Galaxy Watch Ultra (2025)67%

#4#2#3#6
Garmin fēnix 8 47mmGarmin
47 mm · up to 168 hours · Yes
65% 80% 68% 53%
Why it ranks here
- ECG
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- Dual-band GNSS
- Water resistance to 100 m
Why it ranks here
- Editorial tag: Battery Life
How long does the battery last?
Why it ranks here
- 47 mm case
#5#1#1#4
Garmin Forerunner 970Garmin
47 mm · up to 360 hours · Yes
65% 81% 73% 57%
Why it ranks here
- ECG
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- 360 hours of battery
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
- Editorial tag: Battery Life
- 360 hours of battery
How long does the battery last?
Why it ranks here
- 47 mm case
#2#6#6#2
Galaxy Watch Ultra2Samsung
47 mm · up to 60 hours · Yes
77% 62% 50% 65%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 100 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
- 47 mm case
#1#5#5#1
Galaxy Watch Ultra (2025)Samsung
47 mm · up to 60 hours · Yes
77% 62% 50% 67%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 100 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
- 47 mm case
#3#4#4#3
Xiaomi Watch S3Xiaomi
47 mm · up to 360 hours · 5 ATM
66% 64% 61% 62%
Why it ranks here
- Editorial tag: Health Tracking
- Blood oxygen sensor
Why it ranks here
- 360 hours of battery
- Water resistance to 50 m
Why it ranks here
- 360 hours of battery
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 47 mm case
#6#3#2#5
Amazfit Cheetah ProAmazfit
47 mm · up to 336 hours · 5 ATM
54% 78% 70% 56%
Why it ranks here
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- 336 hours of battery
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
- Editorial tag: Battery Life
- 336 hours of battery
How long does the battery last?
Why it ranks here
- 47 mm case