Garmin Forerunner® 45S vs Garmin Vivomove 3SSize, Specs & Wrist Fit Compared
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Garmin
Forerunner® 45S (010-02156-00)
Garmin
Vivomove 3S
The Garmin Forerunner® 45S wears larger than the Garmin Vivomove 3S (39.5mm vs 39mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Garmin Vivomove 3S is the slimmer of the two (10.9mm vs 11.4mm), so it slides under a cuff more easily.
On the wrist the Garmin Forerunner® 45S feels lighter (32g vs 38.6g, case only).
Specification Comparison
| Spec | GarminForerunner® 45S | GarminVivomove 3S |
|---|---|---|
| Case Width | 39.5mm | 39mm |
| Thickness | 11.4mm | 10.9mm |
| Weight | 32g | 38.6g |
| Shape | Circular | Circular |
| Water Resistance | — | Waterproof |
| GPS | Yes | No |
| Display | Sunlight-visible, transflective memory-in-pixel (MIP) | 0.72 inches |
| Always-On Display | — | No |
| Battery life | Smartwatch Mode: Up to 7 days GPS mode: Up to 13 hours | — |
| Battery life (smartwatch mode) | Up to 7 days | — |
| Body Battery™ energy monitor | Yes | — |
| Battery life | — | 5 days |
| Has wireless charging | — | No |
| Has a removable battery | — | No |
| Has a solar power battery | — | No |
| Has a rechargeable battery | — | Yes |
| Has a battery level indicator | — | Yes |
| Released | 2019 | 2019 |
Full Specification Comparison
172 specs| Spec | Garmin Forerunner® 45S | Garmin Vivomove 3S |
|---|---|---|
| Overview | ||
| Family | Garmin | — |
| General | ||
| Battery life | Smartwatch Mode: Up to 7 days GPS mode: Up to 13 hours | — |
| Display Size | 1.04" (26.3 mm) diameter | — |
| Color display | Yes | — |
| Lens Material | chemically strengthened glass | — |
| Memory/History | 80 hours of activity data | — |
| Strap material | silicone | — |
| Charging method | Garmin proprietary plug charger | — |
| Display resolution | 208 x 208 pixels | — |
| Sensors | ||
| GPS | Yes | — |
| GLONASS | Yes | — |
| Galileo | Yes | — |
| Accelerometer | Yes | — |
| Garmin Elevate™ wrist heart rate monitor | Yes | — |
| has GPS | — | No |
| has a compass | — | No |
| Has a barometer | — | Yes |
| has a gyroscope | — | No |
| Has a cadence sensor | — | No |
| has an accelerometer | — | Yes |
| Monitors perspiration | — | No |
| Has a heart rate monitor | — | Yes |
| Has a temperature sensor | — | No |
| Monitors blood oxygenation levels | — | Yes |
| Product Info | ||
| Main SKU | 010-02156-00 | — |
| Product ID | 682416 | — |
| Product Name | Forerunner® 45S | — |
| Release Date | 4/30/2019 | — |
| Product Variation | White | — |
| Clock Features | ||
| Timer | Yes | — |
| Stopwatch | Yes | — |
| Time/date | Yes | — |
| Alarm clock | Yes | — |
| GPS Time Sync | Yes | — |
| Automatic daylight saving time | Yes | — |
| Cycling Features | ||
| Speed and cadence sensor support (w/sensor) | Yes | — |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | — |
| Running Features | ||
| Run workouts | Yes | — |
| Foot pod capable | Yes | — |
| GPS-based distance, time and pace | Yes | — |
| Cadence (provides real-time number of steps per minute) | Yes | — |
| What You'll Love | ||
| Display type | Sunlight-visible, transflective memory-in-pixel (MIP) | — |
| Water rating | 5 ATM | — |
| Battery life (smartwatch mode) | Up to 7 days | — |
| Activity Profiles | ||
| Gym | Cardio, Elliptical Training, Stair Stepping | — |
| Cycling | Biking, Indoor Biking | — |
| Wellness | Yoga | — |
| Indoor running | Treadmill Running, Indoor Track Running | — |
| Outdoor running | Running | — |
| Daily Smart Features | ||
| Calendar | Yes | — |
| Connectivity | Yes | — |
| Find My Phone | Yes | — |
| Find My Watch | Yes | — |
| Weather forecasts | Yes | — |
| Smart Notifications | Yes | — |
| Smartphone compatibility | iPhone®, Android™ | — |
| Controls smartphone music | Yes | — |
| Pairs with Garmin Connect™ Mobile | Yes | — |
| Connect IQ™ (downloadable watch faces, data fields and apps) | yes (watch faces only) | — |
| Activity Tracking Features | ||
| TrueUp™ | Yes | — |
| Move IQ™ | Yes | — |
| Step counter | Yes | — |
| Calories burned | Yes | — |
| Distance traveled | Yes | — |
| Intensity minutes | Yes | — |
| Move alerts (displays on device after a period of inactivity) | Yes | — |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | — |
| Health & Wellness Monitoring | ||
| Sleep | yes (advanced) | — |
| Fitness age | yes (in app) | — |
| All-day stress | Yes | — |
| Resting heart rate | Yes | — |
| Abnormal heart rate alerts | yes (high and low) | — |
| Relaxation breathing timer | Yes | — |
| Body Battery™ energy monitor | Yes | — |
| Wrist-based heart rate (constant, every second) | Yes | — |
| Safety and Tracking Features | ||
| Assistance | yes (smartphone required) | — |
| Live Event Sharing | Android™ Only | — |
| Incident Detection during select activities | yes (smartphone required) | — |
| Training, Planning and Analysis Features | ||
| HR zones | Yes | — |
| HR alerts | Yes | — |
| Manual lap | Yes | — |
| HR calories | Yes | — |
| Voice alerts | Yes | — |
| Physio TrueUp | Yes | — |
| VO2 Max (Run) | Yes | — |
| Advanced workouts | Yes | — |
| Interval training | Yes | — |
| GPS speed and distance | Yes | — |
| Customizable data pages | Yes | — |
| Touch and/or button lock | Yes | — |
| Activity history on watch | Yes | — |
| Downloadable training plans | Yes | — |
| Customizable activity profiles | Yes | — |
| Auto Pause® automatic timer halt | Yes | — |
| Auto Lap® interval tracking feature | Yes | — |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | — |
| Design | ||
| width | — | 39 |
| height | — | 39 |
| volume | — | 16.58 cm³ |
| weight | — | 38.6 g |
| thickness | — | 10.9 |
| resolution | — | 132 x 64 px |
| screen size | — | 0.72 inches |
| Display type | — | OLED/AMOLED |
| Has a display | — | Yes |
| pixel density | — | 204 ppi |
| width of band | — | 18 mm |
| water resistance | — | Waterproof |
| Always-On Display | — | No |
| has a touch screen | — | Yes |
| waterproof depth rating | — | 50 m |
| Watch band is replaceable | — | Yes |
| Has sapphire glass display | — | No |
| maximum operating temperature | — | 50 °C |
| has branded damage-resistant glass | — | No |
| lowest potential operating temperature | — | -10 °C |
| Battery | ||
| battery life | — | 5 days |
| has wireless charging | — | No |
| has a removable battery | — | No |
| Has a solar power battery | — | No |
| has a rechargeable battery | — | Yes |
| Features | ||
| release date | — | 2019-09-05 |
| Has a stopwatch | — | Yes |
| Has smart alarm | — | No |
| Has call control | — | Yes |
| Has silent alarm | — | Yes |
| Has notifications | — | Yes |
| Has ECG technology | — | No |
| Locates your phone | — | Yes |
| has a front camera | — | No |
| has fall detection | — | No |
| has voice commands | — | No |
| Acquires GPS faster | — | No |
| Has vibrating alerts | — | Yes |
| Can be used to answer calls | — | No |
| has irregular heart rate warnings | — | Yes |
| Has a built-in camera remote control function | — | No |
| Connectivity | ||
| has NFC | — | No |
| supports ANT+ | — | Yes |
| supports Wi-Fi | — | No |
| supports Galileo | — | No |
| has a cellular module | — | No |
| Is compatible with iOS | — | Yes |
| Is compatible with Android | — | Yes |
| Miscellaneous | ||
| has aptX | — | No |
| Is compatible with Windows | — | No |
| Is compatible with Mac OS X | — | No |
| has an external memory slot | — | No |
| has a battery level indicator | — | Yes |
| has a socket for a 3.5 mm audio jack | — | No |
| App & Software | ||
| Has achievements | — | Yes |
| Has goal setting | — | Yes |
| Has weight tracking | — | Yes |
| Tracks water intake | — | Yes |
| Has inactivity alerts | — | Yes |
| Has temperature tracking | — | No |
| Provides activity reports | — | Yes |
| Counts how many calories you've burned | — | Yes |
| Activity tracking | ||
| Measures pace | — | Yes |
| Tracks distance | — | Yes |
| Tracks elevation | — | Yes |
| Designed for golf | — | No |
| Tracks your sleep | — | Yes |
| Tracks steps taken | — | Yes |
| Designed for diving | — | No |
| Has a route tracker | — | No |
| Has exercise tagging | — | Yes |
| Has multi-sport mode | — | Yes |
| Tracks calorie intake | — | Yes |
| Provides sleep reports | — | Yes |
| Detects activities automatically | — | Yes |
| Has a stroke counter for swimming | — | No |
Wrist Fit
Garmin Forerunner® 45S
Sits best on wrists ~42–56mm wide (≈ 11.2–15.0cm circumference).
Garmin Vivomove 3S
Sits best on wrists ~41–56mm wide (≈ 10.9–15.0cm circumference).
2D Dimension Schematics
Accurate scale drawings based on case dimensions. Drag to pan, Ctrl+scroll to zoom. Works for every watch regardless of photo availability.
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Frequently Asked Questions
Is the Garmin Forerunner® 45S bigger than the Garmin Vivomove 3S?
The Garmin Forerunner® 45S is bigger — 39.5mm vs 39mm case width.
Which fits a smaller wrist better, the Garmin Forerunner® 45S or the Garmin Vivomove 3S?
The Garmin Forerunner® 45S suits wrists around 42–56mm wide, and the Garmin Vivomove 3S around 41–56mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Forerunner® 45S and Garmin Vivomove 3S side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.
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