vs
2.9Display2.2
2.4Battery life3.7
4.9Health tracking4.9
2.6Sports & outdoor5.0
3.6Build & durability3.5
Dimensions
Size comparison
Forerunner 245 MusicForerunner 255S
| Forerunner 245 Music | Forerunner 255S | Difference | |
|---|---|---|---|
| Height | 42.3 mm | 41 mm | +1.3 mm |
| Width | 42.3 mm | 41 mm | +1.3 mm |
| Thickness | 12.2 mm | 12.4 mm | −0.2 mm |
| Weight | 38 g | 39 g | −0 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Forerunner 245 Music better than Forerunner 255S?
- Screen size1.2″ vs 1.1″+9%
- Resolution (width)240 px vs 218 px+10%
Why is Forerunner 255S better than Forerunner 245 Music?
- Battery life (smartwatch mode)7 days vs 12 days+71%
- Sport profiles16 vs 583.6×
- GPS battery life24 h vs 26 h+8%
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 41 mm |
| Weight | 38.5 g | 39 g |
| Thickness | 12.2 mm | 12.4 mm |
| Height | 42.3 mm | 41 mm |
| Width | 42.3 mm | 41 mm |
| Case material | Plastic / polymer | Plastic / polymer |
| Sapphire crystal | No | No |
| Lens / cover glass | Corning® Gorilla® Glass 3 | Corning® Gorilla® Glass 3 |
| Strap material | silicone | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 5 ATM |
| Display | ||
| Screen size | 1.2″ | 1.1″ |
| 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) | 240 px | 218 px |
| Resolution (height) | 240 px | 218 px |
| Pixel density | 200 ppi | 198 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 7 days | 12 days |
| GPS battery life | 24 h | 26 h |
| GPS battery life (dual-band) | — | 13 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 |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Compass, Accelerometer, Thermometer | GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, 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 | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | — | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 16 | 58 |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | — |
| ANT+ sensors | Yes | Yes |
| Smart features | ||
| Music on the watch | Yes | — |
| Storage | 4 GB | 4 GB |
| Third-party apps | Yes | Yes |
| Platform | ||
| Operating system | Garmin OS | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
