Garmin Forerunner 945 LTE vs Venu 4 45mm
Size, specs & wrist fit compared
Which one fits you
Both need much the same wrist: neither overhangs from 16 cm (6.3 in) round, and both are in their sweet spot around 16.5–19 cm. Wrist size will not decide between these two.
What else differs
- Screen: the Venu 4 45mm has the larger screen, 1.4 in across against 1.2 in on the Forerunner 945 LTE, and the Forerunner 945 LTE uses a memory-in-pixel screen that is easy to read in sunlight and sips battery, the Venu 4 45mm a bright AMOLED screen.
- Battery: 14 days for the Forerunner 945 LTE against 12 days for the Venu 4 45mm in everyday use; 35 hours for the Forerunner 945 LTE against 20 hours for the Venu 4 45mm with GPS on.
The Venu 4 45mm is 0.6mm wider and 1.4mm thinner than the Forerunner 945 LTE.
Forerunner 945 LTE
Venu 4 45mm
Case width
44.4mm
45mm+0.6mm
Thickness
13.9mm
12.5mm−1.4mm
Forerunner 945 LTE or Venu 4 45mm by wrist size
| Wrist round (mm left each side) | Forerunner 945 LTE≈51mm lug to lug, est. | Venu 4 45mm≈51.5mm lug to lug, est. |
|---|---|---|
| 14 cm / 5.5 in | Overhangs (2.9mm over) | Overhangs (3.2mm over) |
| 15 cm / 5.9 in | Overhangs (1.3mm over) | Overhangs (1.6mm over) |
| 16 cm / 6.3 in | Bold (0.3mm) | Bold (0.1mm) |
| 17 cm / 6.7 in | Sweet spot (1.9mm) | Sweet spot (1.7mm) |
| 18 cm / 7.1 in | Sweet spot (3.5mm) | Sweet spot (3.3mm) |
| 19 cm / 7.5 in | Balanced (5.1mm) | Balanced (4.9mm) |
| 20 cm / 7.9 in | Balanced (6.8mm) | Balanced (6.5mm) |
Switch or add watches
Garmin
Forerunner 945 LTE
Garmin
Venu 4 45mm
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Battery life compared
Forerunner 945 LTEVenu 4 45mm
Battery saver
—25 daysSmartwatch
2 weeks12 daysGPS with music
35 hours—GPS only
10 hours20 hoursAll systems
—19 hoursAll systems + multi-band
—17 hoursAll systems with music
—9 hoursAll systems + multi-band with music
—9 hours
More comparisons
2D Dimension Schematics
- Garmin Forerunner 945 LTE 44.4mm × ≈51mm (est.) · 13.9mm thick
- Garmin Venu 4 45mm 45mm × ≈51.5mm (est.) · 12.5mm thick
3D preview
Forerunner 945 LTE vs Venu 4 45mm on a wrist
Specifications
The short version
6 key specs| Spec | GarminForerunner 945 LTE | GarminVenu 4 45mm |
|---|---|---|
| Case Width | 44.4mm | 45mm |
| Thickness | 13.9mm | 12.5mm |
| Shape | Circular | Circular |
| Display type | Sunlight-visible, transflective memory-in-pixel (MIP) | AMOLED (optional always-on mode) |
| Battery life | Smartwatch Mode: Up to 2 weeks GPS mode with music: Up to 12 hours GPS mode with LTE LiveTrack: Up to 10 hours GPS mode with music and LTE LiveTrack: Up to 7 hours GPS mode without music: Up to 35 hours See Details | Smartwatch mode: Up to 12 days (4 days display always-on) Battery Saver Smartwatch mode: Up to 25 days GPS-Only GNSS mode: Up to 20 hours All-Systems GNSS mode: Up to 19 hours All-Systems GNSS mode with music: Up to 9 hours All-Systems GNSS mode + Multi-band: Up to 17 hours All-Systems GNSS mode + Multi-band with music: Up to 9 hours See Details |
| Released | 2021 | 2025 |
Where the specifications differ
8 differences| Spec | Garmin Forerunner 945 LTE | Garmin Venu 4 45mm |
|---|---|---|
| General | ||
| Battery life | Smartwatch Mode: Up to 2 weeks GPS mode with music: Up to 12 hours GPS mode with LTE LiveTrack: Up to 10 hours GPS mode with music and LTE LiveTrack: Up to 7 hours GPS mode without music: Up to 35 hours See Details | Smartwatch mode: Up to 12 days (4 days display always-on) Battery Saver Smartwatch mode: Up to 25 days GPS-Only GNSS mode: Up to 20 hours All-Systems GNSS mode: Up to 19 hours All-Systems GNSS mode with music: Up to 9 hours All-Systems GNSS mode + Multi-band: Up to 17 hours All-Systems GNSS mode + Multi-band with music: Up to 9 hours See Details |
| Display Size | 1.2" (30.4 mm) diameter | 1.4" (35.3 mm) diameter |
| Memory/History | 16 GB | 8 GB |
| Display resolution | 240 x 240 pixels | 454 x 454 pixels |
| What You'll Love | ||
| Display type | Sunlight-visible, transflective memory-in-pixel (MIP) | AMOLED (optional always-on mode) |
| Water rating | 5 ATM | Swim, 5 ATM |
| Training status | Yes | yes (improved) |
| Battery life (smartwatch mode) | Up to 2 weeks | Up to 12 days |
The other 13 specifications both list are identical.
Full Garmin Forerunner 945 LTE specifications →Full Garmin Venu 4 45mm specifications →