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Forerunner 255 vs Forerunner 945 LTE

Garmin Forerunner 255 vs Garmin Forerunner 945 LTE

What Forerunner 255 does better (3) and where Forerunner 945 LTE wins (3) — every spec side by side.

Garmin · 2022Forerunner 255

4.2Score

3 advantages≈ $350

Garmin · 2021Forerunner 945 LTE

4.4Score

3 advantages≈ $600

Higher score

3.5Display2.9

4.8Battery life5.2

4.9Health tracking4.9

5.0Sports & outdoor5.2

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

Only differences	Garmin Forerunner 255≈ $3504.2	Garmin Forerunner 945 LTE≈ $6004.4
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