Garmin Forerunner 745 vs Fenix 6 Pro – Product Comparison

Garmin Forerunner 745 vs Fenix 6 Pro – Product Comparison

The Garmin Forerunner 745 is basically a Forerunner 945 Lite. For all intents and purposes, that’s a good thing. It means that you get pretty much all Garmin’s best endurance sport technology, in a frame that is considerably slimmer than the Fenix series. 

On the other hand, the Fenix 6 Pro includes all the features found in the FR745 (except recommended workouts), and a lot more, including:

  1. Topographical Maps
  2. Much better battery life
  3. Military grade durability
  4. Golf tracking
  5. Much larger music storage capacity

Now that you know about more about these two sports watches, let’s dive into the details. 

Key Similarities - Garmin Forerunner 745 vs Fenix 6 Pro

Forerunner 745

Forerunner 945


Wrist-based HRM

Optical HRM Under Water

24/7 Activity Tracking

Advanced Sleep Tracking

Triathlon Mode

Indoor + Outdoor Running

Indoor + Outdoor Cycling

Indoor + Outdoor Swimming

Indoor + Outdoor Rowing

Music Storage

Payments from Watch

Garmin Running Power

3rd Party Running Power

Advanced Running Metrics

Garmin Running Coach

Garmin PacePro

Garmin ClimbPro

Body Battery Score

Barometric Altimeter

Gyroscope + Accelerometer + Compass

Pulse Oximeter

Bluetooth, ANT+, Wi-Fi

Garmin Connect IQ

Temperature + Altitude Acclimation

Training Load + Training Focus Metrics

Respiration Rate

Safety/Incident Detection

Point-to-Point Navigation

Lens Material

Corning® Gorilla® Glass DX

Corning® Gorilla® Glass DX

Key Differences - Garmin Forerunner 745 vs Fenix 6 Pro

Forerunner 745

Fenix 6 Pro


Less Expensive

More Expensive

Physical Size

43.8 x 43.8 x 13.3 mm

47 x 47 x 14.7 mm

Screen Size

1.2" (30.4 mm) diameter

1.3” (33.02 mm) diameter

Screen Resolution

240 x 240 pixels

260 x 260 pixels


47 grams

72 - 83 grams

Smartwatch Battery

Up to 7 Days

Up to 14 Days

GPS Battery

Up to 16 Hours

Up to 36 Hours

GPS + Music Battery

Up to 6 Hours

Up to 10 Hours

UltraTrac GPS Battery

Up to 21 Hours

Up to 72 Hours

Expedition Battery Mode

Up to 28 Days

Total Sports Modes



Music Storage Capacity

Up to 500 songs

Up to 2000 songs

Waterproof Rating


10 ATM

Daily Workout Suggestions

Military Grade Durability

Golf Mode

Pre-loaded Golf Maps

Pre-loaded Topographical Maps

Pre-loaded Ski Resort Maps

Garmin Fenix 6 Pro Solar

Sports Modes Comparison

Forerunner 745 Sports Modes

  1. Strength Training
  2. Cardio Training
  3. Elliptical Training
  4. Stair Stepping
  5. Floor Climbing
  6. Indoor Rowing
  7. Yoga
  8. Running
  9. Treadmill Running
  10. Indoor Track Running
  11. Trail Running
  12. Skiing
  13. Snowboarding
  14. XC Skiing
  15. Stand Up Paddleboarding
  16. Rowing
  17. Cycling
  18. Indoor Cycling
  19. Pool Swimming
  20. Walking
  21. Pilates
  22. Outdoor Track Running
  23. Virtual Running
  24. Kayaking
  25. Mountain Biking
  26. Open Water Swimming
  27. Swimrun
  28. Triathlon Tracking

Fenix 6 Pro Sports Modes

  1. Strength Training
  2. Cardio Training
  3. Elliptical Training
  4. Stair Stepping
  5. Floor Climbing
  6. Indoor Rowing
  7. Yoga
  8. Pilates
  9. Running
  10. Treadmill Running
  11. Indoor Track Running
  12. Trail Running
  13. Virtual Running
  14. Hiking
  15. Indoor Climbing
  16. Bouldering
  17. Climbing Outdoor
  18. Mountain Biking
  19. Skiing
  20. Snowboarding
  21. XC Skiing
  22. Stand Up Paddleboarding
  23. Rowing
  24. Kayaking
  25. Surfing
  26. Jumpmaster
  27. Tactical
  28. Cycling
  29. Indoor Cycling
  30. Swimrun
  31. Triathlon
  32. Pool Swimming
  33. Open Water Swimming
  34. Golf Tracking

Reasons To Choose the Forerunner 745

Forerunner 745 Reasons

1. It's about $200 cheaper

When you look at the similarities between the Forerunner 745 and the Fenix 6 Pro, it should be clear that the FR745 brings a lot of Garmin’s best features to the table. You could call the FR745 Garmin’s best ‘value for money’ triathlon watch currently available. 

2. The FR745 is Slimmer & Lighter

The Forerunner 745 is much slimmer than the Fenix 6 Pro, and it weighs significantly less. The details are clarified below. 

Forerunner 745 Weight & Size

  • Forerunner 745 Weight: 47 grams
  • Forerunner 745 Size: 43.8 x 43.8 x 13.3 mm

Fenix 6 Pro Weight & Size

  • Fenix 6 Pro Weight: 72 grams
  • Fenix 6 Pro Size: 47 x 47 x 14.7 mm

3. Daily Workout Suggestions

The Forerunner 745 offers training guidance that takes you and your fitness level into account. It will provide daily run and ride recommendations based on your current training load and training status.

Forerunner 745 (Neo Tropic)

Forerunner 745 (White)

Reasons To Choose the Fenix 6 Pro

Garmin Fenix 6 Pro Comparison Table

1. Much Better Battery Life

The biggest chink in the Forerunner 745’s armor is the battery life. It’s almost like Garmin felt that it would be too close to the Forerunner 945 if they gave it an impressive battery life, so they decided to give an average battery life instead. Conversely, the Fenix 6 Pro has very respectable battery life settings, and a bunch of different settings that can allow you to juice every ounce of battery performance. 

Forerunner 745 Battery Life

  • Smartwatch mode: Up to 7 days
  • GPS mode with music: Up to 6 hours
  • GPS mode without music:
  • Up to 16 hours
  • UltraTrac™ mode: Up to 21 hours

Fenix 6 Pro Battery Life

  • Smartwatch: Up to 14 days
  • Battery Saver Watch Mode: Up to 48 days
  • GPS: Up to 36 hours
  • GPS + Music: Up to 10 hours
  • Max Battery GPS Mode: Up to 72 hours
  • Expedition GPS Activity: Up to 28 days

2. Topographical Maps & Ski Maps

The topo map technology built into the Fenix 6 Pro is impressive. You effectively get full color 3D representations of the area that you are navigating, showing all the elevation features of the landscape from an aerial perspective. This is particularly useful for hiking, trail running and mountain biking. 

In addition, the Fenix 6 Pro also comes pre-loaded with over 2,000 ski resort maps. These can make it much easier to explore new territories in a ski resort, safe in the knowledge that you will be able to find your way back to your starting point when your day of skiing comes to an end. 

3. Military Grade Durability (MIL-STD-810G)

MIL-STD-810G is a rating given to certain Garmin products that have been tested to against thermal, shock and water performance. The Fenix 6 Pro is built in accordance with this standard, which effectively means that it can withstand hard knocks and bumps far better than most GPS sports watches. 

If you’re into adventure sports, the durability of the Fenix 6 Pro could be a dealbreaker. Simply put, it is more physically resilient than the Forerunner 745. 

4. Much Larger Music Storage Capacity

If you’re leaning toward the FR745, it should comfort you to know that both watches offer in-built music storage. However, it’s definitely worth pointing out that the music storage capacity of the Fenix 6 Pro is 4 times larger than the music storage capacity of the Forerunner 745. To be more precise: 

  • Forerunner 745 Music Storage – 500 Songs
  • Fenix 6 Pro Music Storage – 2,000 Songs

5. Advanced Golf Tracking

The Fenix 6 Pro quite literally gives you all the same features that you can expect in a dedicated golf watch. This includes: 

  • Yardage to front, middle and back of green
  • Yardage to layups and doglegs
  • Hazards and course targets
  • Measures shot distance automatically
  • Digital scorecard
  • Custom targets
  • Stat Tracking
  • Garmin Autoshot
  • Full Vector Maps
  • 41,000 Pre-loaded Golf Course
  • Pinpointer
  • Playslike distance
  • Green view with manual pin position
  • Garmin truswing compatible

Garmin Fenix 6 Pro Black

Garmin Fenix 6 Pro Solar

Final Thoughts

If you’re still undecided at this point, these final buying tips may help: 

Go for the Forerunner 745 if: 

  • You want a good looking, highly capable GPS triathlon watch
  • You want to save around $200
  • You prefer watches with a slimmer and lighter profile

Go for the Fenix 6 Pro if: 

  • You prefer watches with very long battery life
  • You are likely to use the Topo maps when hiking, trail running or mountain biking
  • You need a highly durable sports watch that can withstand big bumps and knocks
  • You want to store endless hours of music directly on the watch
  • You play golf regularly
  • You want the better sports watch overall