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Garmin Forerunner 45S Black

Never available again

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This product is currently retired. Fortunately, we have a lot of new, similar models. Check out the assortment and find the product that suits you.

Product information

Key specs

Compatible with operating system
Android, iOS
Recommended for wrist circumference
15 - 17 cm
Quality of sports readings
Decent
Quality of health readings
Decent
Battery life in time mode
168 hours

Pros and cons

According to our smartwatch expert
  • The watch displays heart rate zones during workouts, so you can focus your training on improving your endurance, for example.
  • With GPS and GLONASS, the watch determines your location, speed, and route more accurately than comparable watches.
  • The watch doesn't have built-in music storage, so you have to take your smartphone with you each workout.
Product Expert smartwatches

Description

With the Garmin Forerunner 45S, you're always aware of your heart rate. The built-in heart rate sensor automatically measures your heart rate throughout the day. You'll also stay up to date on your burned calories, number of steps, and your sleep. The watch case is 1.56 inches, so it's also suitable for a thinner wrist. The smartwatch automatically recognizes the moment you begin your training. Nobody around to join you in your exercise? With the virtual partner, your watch will always give you a worthy opponent. You can easily connect the smartwatch to your Android or Apple smartphone via Bluetooth. That way, you can see notifications of WhatsApp, Facebook, and Instagram coming in on your wrist.

Note: a charger isn't included. Do you want to charge the watch via a socket? If so, order a charger separately.

This watch is recommended for a 13 to 15cm wrist circumference.

With the Garmin Forerunner 45S, you're always aware of your heart rate. The built-in heart rate sensor automatically measures your heart rate throughout the day. You'll also stay up to date on your burned calories, number of steps, and your sleep. The watch case is 1.56 inches, so it's also suitable for a thinner wrist. The smartwatch automatically recognizes the moment you begin your training. Nobody around to join you in your exercise? With the virtual partner, your watch will always give you a worthy opponent. You can easily connect the smartwatch to your Android or Apple smartphone via Bluetooth. That way, you can see notifications of WhatsApp, Facebook, and Instagram coming in on your wrist.

Note: a charger isn't included. Do you want to charge the watch via a socket? If so, order a charger separately.

This watch is recommended for a 13 to 15cm wrist circumference.

Tips for using this product

Read our tips and find out all about how to set up your product and use it the right way.

Included by default

  • Manual (2.39 MB)
  • USB-A charging cable (excluding charger)
  • Watch strap (wrist circumference 12.4 - 18.5cm)

Included by default

  • Manual (2.39 MB)
  • USB-A charging cable (excluding charger)
  • Watch strap (wrist circumference 12.4 - 18.5cm)

Key specs

Compatible with operating system
Android, iOS
Recommended for wrist circumference
15 - 17 cm
Quality of sports readings
Decent
Quality of health readings
Decent
Battery life in time mode
168 hours

Complete your purchase

Highlighted

How do you choose the right watch size?

It's important to choose the right watch size. If you choose a watch that's too large or small, it probably won't fit well or it won't look good on your wrist. In this article, we'll you what to look out for when choosing the right size.

Visit our stores for personal advice

Get personal advice from our smartwatch experts in one of our stores.

Make an advice appointment in our store

Do you want more information about a watch or do you want to compare several smartwatches? Our experts in the store will answer all your questions and are happy to show you the differences.

Have a screen protector applied to your smartwatch

In all our stores, we cut screen protectors to size and apply them to your screen for you. This way, you know for sure that the protective film fits and it's applied to the screen without bubbles. This is possible for a new watch, but also for your current smartwatch.

Reviews

Rating

116 reviews with 5 stars

115 reviews with 4 stars

6 reviews with 3 stars

2 reviews with 2 stars

0 reviews with 1 star

Rating per section

Battery life
10,0
Wearing comfort
10,0
Design
10,0
Options
10,0

Customer images

Most helpful reviews

9,0/10

Nice watch for targeted training

  • Possibility to create extensive workouts yourself
  • Easy to operate buttons while running
  • Quick sync with phone

Good watch to record your run. If you follow a schedule you can set it as a workout, then you will receive feedback while walking if your pace/heart rate/cadence value is higher or lower than your set goal. Afterwards, the route and data are clearly visible in the Garmin Connect app and, if necessary, linked also in strava. I believe you can also download ready-made Garmin workouts.

  • Arianne
  • 23 April 2021
  • Automatically translated from Dutch
10/10

Nice watch for a nice price with many running functions.

  • Easy in use
  • Nice design, not that big (so also suitable for smaller wrists)
  • Suitable for all kinds of workouts
  • Connecting to GPS takes quite a while. Hopefully there will be a good update from Garmin for that

Nice watch for a nice price with many running functions. You can set up all kinds of training programs via the Garmin app, but also, for example, via TrainingPeaks (via Garmin app). Watch charges quickly and battery lasts long enough. The watch has a beautiful design, so you can also wear it as a "normal" watch.

  • Ellen penning
  • 11 October 2019
  • Automatically translated from Dutch
9,3/10

Good wearing comfort and easy to use.

  • Suitable for small wrists
  • Easy to use
  • Handy app
  • Do not connect to phone.

Very nice watch so far. Very easy to use with the Garmin Connect App. I have a fairly small wrist, so watches often feel large and bulky. Definitely not this one! Recommended.

  • Danée
  • 12 July 2020
  • Automatically translated from Dutch

Insure your smartwatch

You can select one of the Backup Plans below in your shopping cart. It will protect your brand new smartwatch against damage and/or theft.

Garmin Forerunner 45S Black
  • Backup Plan Damage - Cancellable monthly
    2,79 per month
  • Backup Plan Complete - Cancellable monthly
    3,49 per month
  • 2-year Backup Plan Damage
    35,99 one-time payment
  • 2-year Backup Plan Complete
    49,00 one-time payment

Specifications

Product

Product number
840739
Manufacturer code
010-02156-12
Brand
Garmin
Warranty
2 years
Processing of your defect
Via Coolblue
Old product returned for free
Yes

Operating system

Compatible with operating system
Android, iOS
Required iPhone model
iPhone 6s or later
Required Android version smartphone
Android 7.0 or higher
Operating system
Garmin OS
Year introduced
2019
Guaranteed support with updates
48 months after release date

Smartwatch properties

Watch case color
Black
Watch case material
Plastic
Watch case shape
Round
Width
40 mm
Depth
11 mm
Weight
32 g
Size watch case
Small
Recommended for wrist circumference
15 - 17 cm
Shockproof
No
Controlled via buttons on device
Yes

Watch strap properties

Watch strap material
Plastic
Watch strap color
Black
Closure type
Buckle
Interchangeable watch strap
Yes
Compatibility watch strap
Product specific

Screen properties

Screen type
MIP
Always-on display
No
Data display
Digital
Touchscreen
No
Color screen
Yes
Adjustable watch face
Yes
Type of glass
Plastic

Battery

Battery life in time mode
168 hours
Battery life in sports mode
13 hours
Battery/battery capacity
180 Ah
Energy source solar power
No
Wireless charging
No

Connectivity and smart functions

Options internet connection
WiFi only
Bluetooth
Yes
ANT+
Yes
Independent music player
No
Music controls
Yes
Built-in microphone
No
Built-in speakers
No
Spoken directions
No
Call options
Only answer calls
Smartphone notifications
Receive messages
Smart reply
No
App installation possible
Yes
Camera operation
No
NFC
No

Daily activities

Pedometer
Yes
Measures distance
Yes
Speedometer
Yes
Calorie counter
Yes
Measures stairs climbed
No

Heart rate measurement

Heart rate measurement
Yes
Heart rate zones
Yes
Heart rate sensor
Chest strap sold separately, Integrated pulse sensor
Type of heart rate measurement
Optical heart rate measurement
Heart rate measurement moment
Continuously
Notification exceedance heart rate zone
Yes
Irregular heartbeat notification
Yes
Heart rate measurement under water
No

Health properties

Quality of health readings
Decent
Skin temperature sensor
No
Oximeter
No
Blood pressure monitor
No
EDA sensor
No
Sleep score
No
Measure REM sleep
Yes
Average heart rate during sleep
Yes
Measure recovery during sleep
Yes
Menstrual cycle tracking
Yes
Pregnancy monitoring
No

Sports properties

Quality of sports readings
Decent
Recommended for sports
Biking, Fitness, Running
Adjust sport profiles
Yes
Manual training programs
Yes
Save personal records
Yes
Measure fitness age
Yes
Recovery advice
No
Interval training
Yes
VO2 max measurement
Yes
Automatic pausing
Yes
Measures minutes of intensive training
Yes
Measures average speed during activity
Yes
Lap counter
Yes
Race prognosis
No
Measures step distance
Yes
Measure running cadence
Yes
Connection to fitness machines possible
No
ATM score
5

GPS

Built-in GPS receiver
Yes
Global satellite navigation system
GLONASS, GPS, Galileo
GPS application
Route registration

Sensors

Compass
No
Altimeter
No
Accelerometer
Yes
Thermometer
No

Other functionalities

Fall detection
No
Alarm function
Yes
Geofencing
No
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