Garmin · 2020
Forerunner 745Size, Dimensions & Wrist Fit
The Garmin Forerunner 745 sits best on flat wrist widths of about 46–63mm (≈ 12.3–16.8cm wrist circumference). Adjust the slider below to check your wrist.
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The Forerunner® 745 in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 6 hours and 7 days per charge depending on the power mode — smartwatch at best, gps with music at worst.
- Water rated to 5 ATM.
- 13.3mm thick. Thinner than 76% of 44mm watches, so it slides under a cuff more easily than most of its size.
- 1.2" (30.4 mm) diameter Sunlight-visible, transflective memory-in-pixel (MIP) display.
- Takes 22mm bands, so third-party straps fit without an adapter.
Does the Forerunner 745 fit your wrist?
Drag the slider to your wrist width and see the Forerunner 745 overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Garmin Forerunner® 745
Case 43.8mm · Lug-to-lug 43.8mm · Thickness 13.3mm · 47g
Balanced Fit
43.8mm on a 55mm wrist
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 43.8mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist5.6mm spare each side
Comfortable, with visible skin either side.
- Off the wrist13.3mm off the skin
Normal sports-watch height for a wrist this size. (13.3mm case, back against the skin)
- How it seats~4.7mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist47g
Light enough to forget you have it on. (0.9g per mm of wrist)
Happy with the fit? Check current availability for the Forerunner 745.
Check offer2D Dimension Schematics
The Forerunner® 745 drawn to scale — from above, and in profile against the wrist.
- Garmin Forerunner® 74543.8mm · 13.3mm thick
3D preview
Garmin Forerunner® 745 on a wrist
On an arm sized to your own wrist — the view a product photo never gives you.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
How long the Forerunner® 745 lasts, by power mode
Runtime changes by a factor of 28 depending on what you leave switched on. Bars are scaled against the longest mode.
- Smartwatch7 days
- UltraTrac™21 hours
- GPS without music16 hours
- GPS with music6 hours
How the Forerunner® 745 ranks on battery
Against the 296 Garmin watches in our database, ranked on each figure Garmin publishes.
- Everyday use7 days#241 of 285
- GPS tracking16 hours#204 of 267
What size band does the Forerunner® 745 take?
Lug width
22mm
Any 22mm strap fits, so you are not restricted to Garmin's own bands. Quick-release pins let you swap without tools — check that a replacement lists 22mm and quick-release before buying.
Affiliate disclosure: As an Amazon Associate, WatchFitTool earns from qualifying purchases. If you buy through links on this page, we may earn a commission at no extra cost to you. Learn more.
Forerunner® 745 specifications
The figures that decide a purchase, followed by every line Garmin publishes.
- 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 See Details
- Display
- 1.2" (30.4 mm) diameter
- Resolution
- 240 x 240 pixels
- Water rating
- 5 ATM
- Bezel
- fiber-reinforced polymer
- Glass
- Corning® Gorilla® Glass DX
- Strap
- silicone
- Storage
- 4 GB
- Charging
- Garmin proprietary plug charger
Full specification sheet
197 published lines across 19 groups, unedited
Overview
- Family
- Garmin
General
- 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 See Details
- Display Size
- 1.2" (30.4 mm) diameter
- Color display
- Lens Material
- Corning® Gorilla® Glass DX
- Bezel Material
- fiber-reinforced polymer
- Memory/History
- 4 GB
- Strap material
- silicone
- Charging method
- Garmin proprietary plug charger
- Display resolution
- 240 x 240 pixels
- QuickFit® watch band compatible
- yes (22 mm)
Sensors
- GPS
- Compass
- GLONASS
- Galileo
- Gyroscope
- Thermometer
- Accelerometer
- Barometric altimeter
- Pulse Ox Blood Oxygen Saturation Monitor
- Garmin Elevate™ wrist heart rate monitor
Product Info
- Main SKU
- 010-02445-00
- Product ID
- 713363
- Product Name
- Forerunner® 745
- Release Date
- 9/16/2020
- Product Variation
- Black
Clock Features
- Timer
- Stopwatch
- Time/date
- Alarm clock
- GPS Time Sync
- Sunrise/sunset times
- Automatic daylight saving time
Cycling Features
- Courses
- MTB Grit & Flow
- Race an activity
- Power meter compatible
- Advanced cycling dynamics
- Compatible with Varia™ lights
- FTP (Functional Threshold Power)
- yes (with compatible accessory)
- Speed and cadence sensor support (w/sensor)
- Bike lap and lap maximum power (with power sensor)
- Compatible with Varia™ radar (rear-facing radar)
- Compatible with Vector™ and Rally™ (power meters)
- Compatible with Varia Vision™ (head-mounted display)
- Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
Running Features
- Run workouts
- Race predictor
- Foot pod capable
- Running dynamics
- yes (with compatible accessory)
- Lactate threshold
- yes (with compatible accessory)
- Trail run auto climb
- Performance condition
- Run/Walk/Stand detection
- Stride length (real time)
- yes (with compatible accessory)
- PacePro™ Pacing Strategies
- Vertical oscillation and ratio
- yes (with compatible accessory)
- Ground contact time and balance
- yes (with compatible accessory)
- GPS-based distance, time and pace
- Cadence (provides real-time number of steps per minute)
What You'll Love
- Display type
- Sunlight-visible, transflective memory-in-pixel (MIP)
- Water rating
- 5 ATM
- Garmin Pay™
- Music storage
- Training status
- Pulse Ox blood oxygen
- yes (spot-check, and optional all-day acclimation and in sleep)
- Sleep score and insights
- Battery life (smartwatch mode)
- Up to 7 days
Activity Profiles
- Gym
- Strength, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing,
- Swim
- Pool Swimming, Open Water Swimming
- Cycling
- Biking, Mountain Biking, Indoor Biking
- Wellness
- Walking, Pilates, Yoga
- Multisport
- Swimming/Running
- On the Water
- Stand Up Paddleboarding, Rowing, Kayaking
- Snow & winter
- Skiing, Snowboarding, XC Classic Skiing, Backcountry Skiing, Snowshoeing
- Indoor running
- Treadmill Running, Indoor Track Running, Virtual Running
- Outdoor running
- Running, Outdoor Track Running, Trail Running
- Outdoor recreation
- Hiking
Swimming Features
- Pool swim workouts
- Critical swim speed
- Time and distance alerts
- Auto rest (pool swim only)
- Drill logging (pool swim only)
- Pacing alerts (pool swim only)
- Countdown start (pool swim only)
- Underwater wrist-based heart rate
- "Repeat on" rest timer (pool swim only)
- Basic rest timer (up from 0) (pool swim only)
- Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
- Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
- Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)
- Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)
- yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus)
Tactical Features
- Dual grid coordinates
Outdoor Recreation
- TracBack®
- Back to start
- Fish forecast
- yes (via Connect IQ™)
- UltraTrac mode
- Vertical speed
- GPS coordinates
- Area calculation
- yes (via Connect IQ™)
- Elevation profile
- Total ascent/descent
- Future elevation plot
- Distance to destination
- Sun and moon information
- yes (via Connect IQ™)
- Point-to-point navigation
- ClimbPro™ Ascent Planner
- Bread crumb trail in real time
- Barometric trend indicator with Storm Alert
Daily Smart Features
- Calendar
- Connectivity
- Bluetooth®, ANT+®, Wi-Fi®
- Find My Phone
- Find My Watch
- VIRB® Remote
- Weather forecasts
- Smart Notifications
- Smartphone compatibility
- iPhone® & Android™
- Controls smartphone music
- Plays and controls watch music
- Pairs with Garmin Connect™ Mobile
- Text response/reject phone call with text (Android™ only)
- Connect IQ™ (downloadable watch faces, data fields and apps)
Activity Tracking Features
- TrueUp™
- Move IQ™
- Step counter
- Floors climbed
- Calories burned
- Distance traveled
- Intensity minutes
- Automatic rep counting
- Garmin Connect™ Challenges app
- yes (optional Connect IQ app)
- Move alerts (displays on device after a period of inactivity)
- Auto goal (learns your activity level and assigns a daily step goal)
Workout and Training Plans
- Yoga workouts
- Cardio workouts
- Pilates workouts
- Strength workouts
Health & Wellness Monitoring
- Sleep
- yes (advanced)
- Hydration
- yes (in Garmin Connect™ and optional Connect IQ™ widget)
- Fitness age
- yes (in app)
- All-day stress
- Women's health
- yes (in Garmin Connect™ and optional Connect IQ™ widget)
- Respiration rate
- Resting heart rate
- Abnormal heart rate alerts
- yes (high and low)
- Relaxation breathing timer
- Body Battery™ energy monitor
- Wrist-based heart rate (constant, every second)
Safety and Tracking Features
- Assistance
- Live Event Sharing
- Android™ Only
- Incident Detection during select activities
- Incident detection alert on phone for wearables
Kid Activity Tracking Features
- Toe-to-Toe™ Challenges app
- yes (optional Connect IQ Toe-to-Toe™ Challenges app)
Training, Planning and Analysis Features
- % HRR
- % HR max
- HR zones
- HR alerts
- Shortcuts
- Manual lap
- Auto max HR
- Auto scroll
- Finish time
- HR calories
- Voice alerts
- Custom alerts
- Physio TrueUp
- Recovery time
- Training load
- VO2 Max (Run)
- Course guidance
- Training effect
- Virtual Partner
- Race an Activity
- Advanced workouts
- Interval training
- Training load focus
- Garmin Live Segments
- Strava Live Segments
- GPS speed and distance
- Improved recovery time
- Configurable lap alerts
- Customizable data pages
- Touch and/or button lock
- Activity history on watch
- Downloadable training plans
- Training effect (anaerobic)
- Manual multisport activities
- HRM running pace and distance
- Heat and altitude acclimation
- Customizable activity profiles
- Trendline™ Popularity Routing
- yes (in Garmin Connect™)
- Auto Pause® automatic timer halt
- Auto Lap® interval tracking feature
- Primary benefit (Training Effect labels)
- Round-trip course creator (running/cycling)
- yes (in Garmin Connect™)
- HR broadcast (broadcasts HR data over ANT+® to paired devices)
- yes (using ANT+ or BLE)
- HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels)
- yes (with compatible accessory)
Alternatives to the Forerunner® 745
Watches that cover a similar amount of wrist, with the measurements that separate them.
Garmin
vívoactive®
- Width
- 43.8mm
- Thick
- 8mm
- Weight
- 38g
Garmin
Approach® S12
- Width
- 43.7mm
- Thick
- 11.5mm
- Weight
- 34.1g
Garmin
Venu® 2 Plus
- Width
- 43.6mm
- Thick
- 12.6mm
- Weight
- 51g
Garmin
D2™ Air X10
- Width
- 43.6mm
- Thick
- 12.6mm
- Weight
- 51g
Garmin
vívomove® 3
- Width
- 44mm
- Thick
- 11.3mm
- Weight
- 29.6g
Garmin
Garmin Swim™
- Width
- 44mm
- Thick
- 13mm
- Weight
- 40g
Forerunner® 745 — Frequently Asked Questions
Will the Garmin Forerunner 745 fit my wrist?
The Garmin Forerunner 745 looks balanced on flat wrist widths of roughly 46–63mm (about 12.3–16.8cm circumference). Drag the slider above to check it against your own measurement.
What size band does the Garmin Forerunner 745 take?
22mm. Any 22mm strap fits, so you are not limited to Garmin's own bands — look for a quick-release fitting if you want to swap without tools.
How long does the Garmin Forerunner 745 battery last?
Between 6 hours and 7 days per charge, depending on the power mode. Garmin rates Smartwatch at 7 days and GPS with music at 6 hours; the chart above lists all 4 modes.
How does the Garmin Forerunner 745 battery compare with other Garmin watches?
At 7 days in everyday use it ranks #241 of the 285 Garmin watches in our database — below the middle of the range. The full ranking, including GPS and power-saving figures, is on our Garmin battery life comparison.
Is the Garmin Forerunner 745 thick for a 44mm watch?
At 13.3mm, thinner than 76% of 44mm watches, so it slides under a cuff more easily than most of its size. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
What other watches are the same size as the Garmin Forerunner 745?
Omega Seamaster Diver 300M Master Co-Axial 43.5 Milano Cortina 2026 Winter Olympics, TAG Heuer Carrera Chronograph Extreme Sport Titanium - Ceramic / Blue / Bracelet, Apple Watch Ultra 3, Samsung Galaxy Watch8 - LTE · 44mm all sit within half a millimetre of the Garmin Forerunner 745's 43.8mm case, so they cover the same amount of wrist.
