Garmin Forerunner 245

Works with: iPhone and Android
Display: MIP, 1.2 in
Case sizes: 42.3 mm
Battery: 7 days
GPS battery: 24 hours
Water resistance: 5 ATM
Weight: 38.5 g

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Garmin Forerunner 245 at a glance

Battery

About a week

Up to 7 days in smartwatch mode. 24 hours with GPS.
GPS

Built-in GPS

No maps. Runs and rides without your phone.
Display

MIP, 1.2 in

1.2 in.
Health

Heart, sleep and more

Measures blood oxygen.
Phone & smart

iPhone and Android

Notifications from your phone.
Build

5 ATM water rating

38.5 g.

Garmin Forerunner 245 full specifications

Overview

Brand	Garmin
Model	Forerunner 245
Series	Forerunner

Platform & apps

Works with iPhone and Android phones, running Garmin.

It has an app store for extra apps and watch faces.

Operating system	Garmin
Works with	iPhone and Android
Storage	4 GB
App store	Yes

Display

A memory-in-pixel screen: always on, easy to read in sunlight and very light on the battery.

1.2 in.

Display type	MIP
Display name	Sunlight-visible, transflective memory-in-pixel (MIP)
Screen size	1.2 in
Resolution	240 x 240
Colour display	Yes

Design & durability

A 42.3 mm case weighing 38.5 g.

Rated 5 ATM: fine for swimming laps and showers.

Case sizes	42.3 mm
Case shape	Round
Dimensions	42.3 x 42.3 x 12.2 mm
Thickness	12.2 mm
Weight (case)	38.5 g
Bezel material	fiber-reinforced polymer
Lens	Corning Gorilla Glass 3
Band material	silicone
Band width	20 mm
Band fitting	Quick Release 20 mm
Fits wrists	127-204 mm
Water resistance	5 ATM

Battery

About a week: up to 7 days in smartwatch mode.

With GPS on, up to 24 hours. Real battery life depends on screen brightness, notifications and workouts.

Battery (smartwatch mode)	7 days
Battery (GPS)	24 hours
All battery modes	Smartwatch: 7 days; GPS: 24 hours
Charging	proprietary-plug

GPS & navigation

Built-in GPS, so you can record runs and rides without your phone.

Navigation shows a breadcrumb trail, not a full map.

GPS	Built-in
Satellite systems	GPS, GLONASS, Galileo
Maps	Breadcrumb trail
Navigation features	back-to-start, TracBack, point-to-point navigation, course guidance

Health & sensors

Tracks heart rate around the clock, plus blood oxygen.

For sleep, it offers sleep stages.

Sensors	optical HR, SpO2, accelerometer, compass, thermometer
Heart-rate sensor	Garmin Elevate
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Blood oxygen (SpO2)	Yes
Sleep tracking	Sleep stages
Stress tracking	Yes
Energy score	Body Battery
Cycle tracking	Yes

Safety

Has an emergency SOS feature.

SOS works through your paired phone. Live tracking lets friends follow your workouts.

Emergency SOS	Via phone
Incident detection	Yes
Live tracking	Yes

Training

Auto activity detection	Yes
Swim tracking	Pool
Underwater heart rate	Yes
Training metrics	VO2 max, training load, training effect, recovery time, race predictor
Running dynamics	Yes
Strength rep counting	Yes
Heart-rate broadcast	Yes
External sensors	ANT+, foot pod, speed/cadence, bike radar/lights

Smart features

Notifications	Yes
Message replies	Android
Find my phone	Yes

Specs compiled from Garmin's product pages and datasheets. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.