Garmin Forerunner 945 vs. Garmin Forerunner 645 Standard Comparison Chart
Verified differences, current offers, and the use cases each model fits best.
Which should you choose?
Choose Garmin Forerunner 945 if…
Its price and overall feature balance better match your priorities.
Choose Garmin Forerunner 645 Standard if…
Its price and overall feature balance better match your priorities.
View full technical comparison
| Product name | Garmin Forerunner 945 | Garmin Forerunner 645 Standard |
|---|---|---|
| Best Offers | $364 Amazon | $239 Amazon |
| OS | Proprietary OS | Garmin Watch OS |
| Battery life | 2 weeks | 7 days |
| Glass protection | Corning Gorilla Glass DX | Corning Gorilla Glass 3 |
| Storage | 16 GB | N/A |
| Screen size | 1.2 in | 1.2 in |
| Screen type | Transflective memory-in-display (MIP) | transflective memory-in-pixel (MIP) |
| Screen shape | Round | Round |
| Screen resolution | 240 x 240 px | 240 x 240 px |
| Weight | 50 g | 41.8 g |
| Bluetooth version | 4.2 | N/A |
| Wi-Fi | yes | yes |
| Heart Rate Monitor | yes | yes |
| GPS support | yes | yes |
| NFC support | no | no |
| Ambient Light Sensor | yes | no |
| SIM Card Support | no | no |
| Speaker | no | no |
| Mic | no | no |
| Camera | no | no |
| Water resistance | 5 ATM | 5 ATM |
| Charging type | USB charging cable | Magnetic connector |
| Release date | April, 2019 | Feb, 2018 |
| Warranty | 12 months | 12 months |
| Other features | Hiking, Climbing, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Kayaking | Running, Treadmill Running, Indoor Track, Trail Running |
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