Garmin Forerunner® 945 LTE — case dimensions and design

Garmin · 2021

Forerunner® 945 LTESize, Dimensions & Wrist Fit

Case Width

44.4mm

Thickness

13.9mm

Battery

2 weeks

Weight

49g

The Garmin Forerunner® 945 LTE sits best on flat wrist widths of about 47–63mm (≈ 12.6–16.8cm wrist circumference). Adjust the slider below to check your wrist.

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The Forerunner® 945 LTE in short

The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.

Between 7 hours and 2 weeks per charge depending on the power mode — smartwatch at best, gps with music and lte livetrack at worst.
Water rated to 5 ATM.
13.9mm thick. Thinner than 74% 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® 945 LTE fit your wrist?

Drag the slider to your wrist width and see the Forerunner® 945 LTE overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.

Fit tool

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.

Your wrist

≈ 146.9mm around

Garmin Forerunner® 945 LTE

Case 44.4mm · Lug-to-lug 44.4mm · Thickness 13.9mm · 49g

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Balanced Fit

44.4mm on a 55mm wrist

Understated Balanced Sweet Spot Bold Overhang ⚠

Across the wrist it works — 5.3mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.

On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 44.4mm, so you could go bigger.

How to Measure

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.

Complete Wrist Measurement Guide →

Against one you know

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 measurements

Across the wrist5.3mm spare each side
Comfortable, with visible skin either side.
Off the wrist13.9mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (13.9mm case, back against the skin)
How it seats~4.9mm under the rim
Seats well, with the case back following most of the wrist.
Weight on the wrist49g
Light enough to forget you have it on. (0.9g per mm of wrist)

Happy with the fit? Check current availability for the Forerunner® 945 LTE.

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2D Dimension Schematics

The Forerunner® 945 LTE drawn to scale — from above, and in profile against the wrist.

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From above — true scale

From the side — how far it sits off the wrist

Garmin Forerunner® 945 LTE44.4mm · 13.9mm thick

3D preview

Garmin Forerunner® 945 LTE on a wrist

On an arm sized to your own wrist — the view a product photo never gives you.

Open 3D try-on

Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.

Which Forerunner 945 size fits you?

This model comes in 2 versions. Set your measurement and each one reports its own verdict — tap any size to open its page.

Which of these fits your wrist?

Flat wrist width55.0mm

Roughly a 14.7cm wrist circumference — the measurement a tape gives you. Compared against lug-to-lug where we have it, case width otherwise.

All 2 Forerunner 945 variants fit this wrist. The 47mm gives you the most presence without overhanging; the smallest is the discreet end of the range.

44.4mm · LTEViewing

Balanced Fit

Width: 44.4mm
Thick: 13.9mm
Weight: 49g

5.3mm clear a side

47mmBest fit

Sweet Spot

Width: 47mm
Thick: 13.7mm
Weight: 50g

4.0mm clear a side

View this size

How long the Forerunner® 945 LTE lasts, by power mode

Runtime changes by a factor of 48 depending on what you leave switched on. Bars are scaled against the longest mode.

Smartwatch2 weeks
GPS without music35 hours
GPS with music12 hours
GPS with LTE LiveTrack10 hours
GPS with music and LTE LiveTrack7 hours

How the Forerunner® 945 LTE ranks on battery

Against the 296 Garmin watches in our database, ranked on each figure Garmin publishes.

Everyday use14 days#151 of 285
GPS tracking10 hours#243 of 267

See all 296 Garmin watches ranked by battery life

What size band does the Forerunner® 945 LTE 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.

Shop 22mm bands

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Forerunner® 945 LTE specifications

The figures that decide a purchase, followed by every line Garmin publishes.

Battery life: Smartwatch Mode: Up to 2 weeks GPS mode with music: Up to 12 hours GPS mode with LTE LiveTrack: Up to 10 hours GPS mode with music and LTE LiveTrack: Up to 7 hours GPS mode without music: Up to 35 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 3 DX
Strap: silicone
Storage: 16 GB
Charging: Garmin proprietary plug charger

Full specification sheet

240 published lines across 20 groups, unedited

Overview

Family: Garmin

General

Battery life: Smartwatch Mode: Up to 2 weeks GPS mode with music: Up to 12 hours GPS mode with LTE LiveTrack: Up to 10 hours GPS mode with music and LTE LiveTrack: Up to 7 hours GPS mode without music: Up to 35 hours See Details
Display Size: 1.2" (30.4 mm) diameter
Color display
Lens Material: Corning® Gorilla® Glass 3 DX
Bezel Material: fiber-reinforced polymer
Memory/History: 16 GB
Strap material: silicone
Charging method: Garmin proprietary plug charger
Large font option
Display resolution: 240 x 240 pixels
QuickFit® watch band compatible: yes (22 mm compatible)

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: 010-02383-00
Product ID: 698632
Product Name: Forerunner® 945 LTE
Release Date: 6/2/2021
Product Variation: Black Watch Only

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)
Cycle Map (routable cycling-specific street map)
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)

Golfing Features

PinPointer
Handicap scoring
Digital scorecard
Garmin AutoShot™
Round timer/odometer
TruSwing™ compatible
Auto CourseView updates
Yardage to layups/doglegs
Hazards and course targets
Pairs with Garmin Golf app
Green View with manual pin position
Preloaded with 43,000 courses worldwide
Yardage to F/M/B (distance to front, middle and back of green)
Stat tracking (strokes, putts per round, greens and fairways hit)
Measures shot distance (calculates exact yardage for shots from anywhere on course): automatic

Running Features

Hill score
Run workouts
Running power
Race predictor
Foot pod capable
Running dynamics
Lactate threshold: yes (with compatible accessory)
Grade-adjusted pace
Trail run auto climb
Performance condition
Stride length (real time)
PacePro™ Pacing Strategies
Vertical oscillation and ratio
Ground contact time and balance
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
Built-in mapping
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 2 weeks

Activity Profiles

Gym: Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing
Swim: Pool Swimming, Open Water Swimming
Cycling: Biking, Mountain Biking, eBiking, eMountain Biking, Indoor Biking
Wellness: Walking, Pilates, Yoga
Multisport: Swimming/Running, Triathlon
In the ring: Boxing, Mixed Martial Arts
Team sports: Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball
On the Water: Stand Up Paddleboarding, Rowing, Kayaking
Racket sports: Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball
Snow & winter: Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing
Indoor running: Treadmill Running, Indoor Track Running, Virtual Running
Outdoor running: Running, Outdoor Track Running, Trail Running, Ultra Running
Outdoor recreation: Hiking, Climbing, Golfing, Disc Golf
Other activity profiles: Inline skating

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

XERO™ Locations
Dual grid coordinates

Outdoor Recreation

TracBack®
Back to start
Fish forecast: yes (via Connect IQ™)
Explore Nearby
UltraTrac mode
Vertical speed
GPS coordinates
Area calculation: yes (via Connect IQ™)
Elevation profile
Projected waypoint
Total ascent/descent
Future elevation plot
Distance to destination
Sun and moon information: yes (via Connect IQ™)
Point-to-point navigation
ClimbPro™ Ascent Planner
Rest Timer (Ultra Run only)
Preloaded road and trail maps
Bread crumb trail in real time
Downloadable cartography support
Barometric trend indicator with Storm Alert

Daily Smart Features

Calendar
Connectivity: Bluetooth®, ANT+®, Wi-Fi®, LTE (with subscription)
Find My Phone
Find My Watch
VIRB® Remote
Morning report
Weather forecasts
Smart Notifications
Smartphone compatibility: iPhone®, Android™
Controls smartphone music
Plays and controls watch music
Pairs with Garmin Connect™ Mobile
Battery saver (customizable low power watch)
View images from notifications on watch (Android™ only)
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
On-screen workout animations
On-screen workout muscle maps

Health & Wellness Monitoring

Sleep: yes (advanced)
Hydration: yes (in Garmin Connect™ and optional Connect IQ™ widget)
Breathwork
Fitness age: yes (in app)
Nap detection
All-day stress
Women's health: yes (in Garmin Connect™ and optional Connect IQ™ widget)
Health snapshot
Respiration rate
Resting heart rate
Relaxation reminders
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
Assistance Plus: yes (with LTE subscription; coverage details)
Live Event Sharing
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
Endurance score
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
Unified training status
Touch and/or button lock
Activity history on watch
Downloadable training plans
Training effect (anaerobic)
Manual multisport activities
Heat and altitude acclimation
Customizable activity profiles
Trendline™ Popularity Routing
Auto Pause® automatic timer halt
Respiration rate (during exercise): yes (with compatible accessory)
Auto Lap® interval tracking feature
Primary benefit (Training Effect labels)
Round-trip course creator (running/cycling)
HR broadcast (broadcasts HR data over ANT+® to paired devices)
Improved interval (includes open repeats, intervals data page, rest screen and auto detection)
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® 945 LTE

Watches that cover a similar amount of wrist, with the measurements that separate them.

Forerunner® 945 LTE — Frequently Asked Questions

Will the Garmin Forerunner® 945 LTE fit my wrist?

The Garmin Forerunner® 945 LTE looks balanced on flat wrist widths of roughly 47–63mm (about 12.6–16.8cm circumference). Drag the slider above to check it against your own measurement.

What size band does the Garmin Forerunner® 945 LTE 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® 945 LTE battery last?

Between 7 hours and 2 weeks per charge, depending on the power mode. Garmin rates Smartwatch at 2 weeks and GPS with music and LTE LiveTrack at 7 hours; the chart above lists all 5 modes.

How does the Garmin Forerunner® 945 LTE battery compare with other Garmin watches?

At 14 days in everyday use it ranks #151 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® 945 LTE thick for a 44mm watch?

At 13.9mm, thinner than 74% 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.

Should I get the 44.4mm or 47mm Forerunner 945?

The Forerunner 945 comes in 2 case sizes — 44.4mm, 47mm. Which one suits you depends on the flat width of your wrist rather than preference: the larger sizes need a wider wrist to sit inside the edge. Set your measurement in the size picker above and each variant reports its clearance in millimetres.

What other watches are the same size as the Garmin Forerunner® 945 LTE?

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® 945 LTE's 44.4mm case, so they cover the same amount of wrist.

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