Garmin Forerunner 745

Works with: iPhone and Android
Display: MIP, 1.2 in
Case sizes: 43.8 mm
Battery: 7 days
GPS battery: 16 hours
Water resistance: 5 ATM
Weight: 47 g

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Garmin Forerunner 745 at a glance

Battery

About a week

Up to 7 days in smartwatch mode. 16 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 and HRV.
Phone & smart

iPhone and Android

Payments and music.
Build

5 ATM water rating

47 g.

Garmin Forerunner 745 full specifications

Overview

Brand	Garmin
Model	Forerunner 745
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
Screen size	1.2 in
Resolution	240 x 240
Colour display	Yes

Design & durability

A 43.8 mm case weighing 47 g.

Rated 5 ATM: fine for swimming laps and showers.

Case sizes	43.8 mm
Dimensions	43.8 x 43.8 x 13.3 mm
Thickness	13.3 mm
Weight (case)	47 g
Bezel material	fiber-reinforced polymer
Lens	Corning Gorilla Glass DX
Band material	silicone
Band width	22 mm
Band fitting	QuickFit 22 mm
Fits wrists	126-216 mm
Water resistance	5 ATM

Battery

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

With GPS on, up to 16 hours. Makers test with their own settings, so treat these as best-case figures.

Battery (smartwatch mode)	7 days
Battery (GPS)	16 hours
All battery modes	Smartwatch: 7 days; GPS: 6 hours; GPS: 16 hours; Battery saver: 21 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	point-to-point navigation, Bread crumb trail in real time, back-to-start, TracBack, ClimbPro Ascent Planner, course guidance

Health & sensors

Tracks heart rate around the clock, plus blood oxygen and HRV.

For sleep, it offers a nightly sleep score.

Sensors	optical HR, SpO2, barometer, compass, gyroscope, accelerometer, thermometer
Heart-rate sensor	Garmin Elevate
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Heart-rate variability	Yes
Blood oxygen (SpO2)	Yes
Respiration rate	Yes
Sleep tracking	Sleep score
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

Built for training, with the metrics serious athletes use.

It adds a triathlon mode.

Auto activity detection	Yes
Triathlon / multisport	Yes
Swim tracking	Pool and open water
Underwater heart rate	Yes
Training metrics	VO2 max, training load, training effect, recovery time, race predictor, lactate threshold
Running dynamics	Yes
Strength rep counting	Yes
Heart-rate broadcast	Yes
External sensors	ANT+, Bluetooth HR strap, power meter, foot pod, speed/cadence, bike radar/lights

Smart features

Smart extras include contactless payments and music storage.

Notifications	Yes
Message replies	Android
Contactless payments	Yes
Payment service	Garmin Pay
Music storage	Yes
Find my phone	Yes

Diving, golf & more

Specialist modes	tactical, ski

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.