vs
3.5Display2.9
4.8Battery life5.2
4.9Health tracking4.9
4.9Sports & outdoor5.1
2.7Build & durability2.7
Dimensions
Size comparison
Forerunner 255Forerunner 945 LTE
| Forerunner 255 | Forerunner 945 LTE | Difference | |
|---|---|---|---|
| Height | 45.6 mm | 44.4 mm | +1.2 mm |
| Width | 45.6 mm | 44.4 mm | +1.2 mm |
| Thickness | 12.9 mm | 13.9 mm | −1 mm |
| Weight | 49 g | 49 g | = |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 255 better than Forerunner 945 LTE?
- Screen size1.3″ vs 1.2″+8%
- Resolution (width)260 px vs 240 px+8%
- Thickness12.9 mm vs 13.9 mm+8%
Why is Forerunner 945 LTE better than Forerunner 255?
- GPS battery life30 h vs 35 h+17%
- Storage4 GB vs 16 GB4×
- Sport profiles58 vs 60+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | 44 mm |
| Weight | 49 g | 49 g |
| Thickness | 12.9 mm | 13.9 mm |
| Height | 45.6 mm | 44.4 mm |
| Width | 45.6 mm | 44.4 mm |
| Case material | Plastic / polymer | Plastic / polymer |
| Sapphire crystal | No | No |
| Lens / cover glass | Corning® Gorilla® Glass 3 | Corning® Gorilla® Glass 3 DX |
| Strap material | silicone | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.3″ | 1.2″ |
| Display technology | Memory-in-pixel (transflective) | Memory-in-pixel (transflective) |
| Panel | Sunlight-visible, transflective memory-in-pixel | Sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | No | No |
| Always-on display | Yes | Yes |
| Resolution (width) | 260 px | 240 px |
| Resolution (height) | 260 px | 240 px |
| Pixel density | 200 ppi | 200 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 14 days | 14 days |
| GPS battery life | 30 h | 35 h |
| GPS battery life (dual-band) | 16 h | — |
| Battery type | Lithium ion | — |
| Wireless charging | No | No |
| Charging | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | — |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO |
| Offline maps | — | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | Yes |
| Sport profiles | 58 | 60 |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | — | Yes |
| Wi-Fi | — | Wi-Fi 4 |
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Music on the watch | — | Yes |
| Storage | 4 GB | 16 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
