Samsung Galaxy Watch 4 - Wi-Fi · 40mm vs Samsung Galaxy Watch7 - LTE · 40mmSize, Specs & Wrist Fit Compared
The Samsung Galaxy Watch 4 - Wi-Fi · 40mm is 1.1mm shorter, 0.1mm thicker and 7.9g lighter than the Samsung Galaxy Watch7 - LTE · 40mm. Both are circular.
Measured against the Samsung Galaxy Watch 4 - Wi-Fi · 40mm.
- Case width
- 40.4mmbaseGalaxy Watch 4 - Wi-Fi · 40mm40.4mmsameGalaxy Watch7 - LTE · 40mm
- Lug-to-lug
- 39.3mmbaseGalaxy Watch 4 - Wi-Fi · 40mm40.4mm+1.1mmGalaxy Watch7 - LTE · 40mm
- Thickness
- 9.8mmbaseGalaxy Watch 4 - Wi-Fi · 40mm9.7mm−0.1mmGalaxy Watch7 - LTE · 40mm
- Weight
- 25.9gbaseGalaxy Watch 4 - Wi-Fi · 40mm33.8g+7.9gGalaxy Watch7 - LTE · 40mm
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Samsung
Galaxy Watch 4 - Wi-Fi · 40mm
Samsung
Galaxy Watch7 - LTE · 40mm
Which one fits you
On wrists narrower than about 43mm, the Samsung Galaxy Watch 4 - Wi-Fi · 40mm is the safer pick — it stays proportionate down to roughly 41mm, where the Samsung Galaxy Watch7 - LTE · 40mm starts to hang over the edge. Above 43mm both sit cleanly, and the Samsung Galaxy Watch7 - LTE · 40mm gives you more presence.
The Samsung Galaxy Watch 4 - Wi-Fi · 40mm and Samsung Galaxy Watch7 - LTE · 40mm share a near-identical 40.4mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
On the wrist the Samsung Galaxy Watch 4 - Wi-Fi · 40mm feels lighter (25.9g vs 33.8g, case only).
Among the 509 40mm watches we hold thickness for, the Samsung Galaxy Watch 4 - Wi-Fi · 40mm is thinner than 66%, so it wears flatter than its width suggests.
Among the 509 40mm watches we hold thickness for, the Samsung Galaxy Watch7 - LTE · 40mm is thinner than 67%, so it wears flatter than its width suggests.
Specification Comparison
| Spec | SamsungGalaxy Watch 4 - Wi-Fi · 40mm | SamsungGalaxy Watch7 - LTE · 40mm |
|---|---|---|
| Case Width | 40.4mm | 40.4mm |
| Lug-to-Lug | 39.3mm | 40.4mm |
| Thickness | 9.8mm | 9.7mm |
| Weight | 25.9g | 33.8g |
| Shape | Circular | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.2 inches | 1.3 inches |
| Always-On Display | Yes | Yes |
| Battery life | 2 days | 1.6 days |
| Battery power | 247 mAh | 300 mAh |
| Has wireless charging | Yes | Yes |
| Has a removable battery | No | No |
| Has a solar power battery | No | No |
| Has a rechargeable battery | Yes | Yes |
| Has a battery level indicator | Yes | Yes |
| Released | 2021 | 2024 |
Hover a row to highlight that measurement in the schematics below.
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist. Built from the measurements, so it works for every watch whether or not it has a photo.
- Samsung Galaxy Watch 4 - Wi-Fi · 40mm40.4mm × 39.3mm · 9.8mm thick
- Samsung Galaxy Watch7 - LTE · 40mm40.4mm · 9.7mm thick
Samsung Galaxy Watch 4 - Wi-Fi · 40mm vs Samsung Galaxy Watch7 - LTE · 40mm on a wrist
Put Samsung Galaxy Watch 4 - Wi-Fi · 40mm and Samsung Galaxy Watch7 - LTE · 40mm on the same arm, sized to your own wrist, and turn it. Side by side or stacked on one spot, whichever answers the question faster.
- Samsung Galaxy Watch 4 - Wi-Fi · 40mm — 40.4mm case, standing 9.8mm off the wrist.
- Samsung Galaxy Watch7 - LTE · 40mm — 40.4mm case, standing 9.7mm off the wrist.
Whether that clears your wrist edges is the question worth answering, and it depends on your wrist rather than on the case diameter.
See them on a wrist in 3DCase shapes are generated from each watch's published measurements — case width, lug-to-lug and thickness — not from manufacturer 3D models, so the proportions are accurate while the dial is generic.
Battery life compared
Furthest apart in Smartwatch mode, where the Samsung Galaxy Watch 4 - Wi-Fi · 40mm lasts 1.2× as long as the Samsung Galaxy Watch7 - LTE · 40mm (2 days against 38.4 hours).
Samsung Galaxy Watch 4 - Wi-Fi · 40mmSamsung Galaxy Watch7 - LTE · 40mm
Smartwatch
2 days1.6 daysBattery Saver
40 hours—
Full Specification Comparison
122 specs| Spec | Samsung Galaxy Watch 4 - Wi-Fi · 40mm | Samsung Galaxy Watch7 - LTE · 40mm |
|---|---|---|
| Design | ||
| width | 40.4 | 40.4 |
| height | 39.3 | 40.4 |
| volume | 15.56 cm³ | 15.83 cm³ |
| weight | 25.9 g | 33.8 g |
| thickness | 9.8 | 9.7 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 396 x 396 px | 432 x 432 px |
| screen size | 1.2 inches | 1.3 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 455 ppi | 327 ppi |
| width of band | 20 mm | 20 mm |
| water resistance | Waterproof | Water resistant |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| Gorilla Glass version | Gorilla Glass DX+ | — |
| waterproof depth rating | 50 m | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | Yes |
| Ingress Protection (IP) rating | IP68 | IP68 |
| has branded damage-resistant glass | Yes | No |
| is designed for kids | — | No |
| maximum operating temperature | — | 35 °C |
| lowest potential operating temperature | — | 0 °C |
| Battery | ||
| charge time | 2 hours | — |
| battery life | 2 days | 1.6 days |
| battery power | 247 mAh | 300 mAh |
| has wireless charging | Yes | Yes |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in power save mode | 40 hours | — |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | Yes | Yes |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | No | No |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | No | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| RAM | 1.5GB | 2GB |
| CPU speed | 2 x 1.18 GHz | — |
| release date | 2021-08-11 | 2024-07-10 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | — |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| has HRV tracking | Yes | Yes |
| internal storage | 16GB | 32GB |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | Yes |
| Locates your phone | Yes | Yes |
| has a front camera | No | — |
| has fall detection | Yes | Yes |
| has voice commands | Yes | Yes |
| Acquires GPS faster | No | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | — |
| shows readiness level | No | Yes |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | Yes |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | Yes | Yes |
| Connectivity | ||
| has NFC | Yes | Yes |
| Wi-Fi version | Wi-Fi 4 (802.11n) | Wi-Fi 4 (802.11n) |
| supports ANT+ | No | No |
| supports Wi-Fi | Yes | Yes |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5 | 5.3 |
| has a cellular module | No | Yes |
| Is compatible with iOS | No | No |
| Is compatible with Android | Yes | Yes |
| SIM cards | — | 1 eSIM |
| Miscellaneous | ||
| has aptX | No | — |
| Has passcode | Yes | Yes |
| Has auto pause | Yes | Yes |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an ambient light sensor | Yes | — |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | Yes |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Compatible with external heart rate monitors | Yes | Yes |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | Yes |
| Has coaching | Yes | Yes |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has exercise diary | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | No | Yes |
| Doesn’t require account | No | — |
| Provides activity reports | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Includes maps | — | Yes |
| Can be personalised | — | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| Designed for golf | No | No |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | Yes | No |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | Yes |
Wrist Fit
Samsung Galaxy Watch 4 - Wi-Fi · 40mm
Sits best on wrists ~41–56mm wide (≈ 10.9–15.0cm circumference).
Samsung Galaxy Watch7 - LTE · 40mm
Sits best on wrists ~43–58mm wide (≈ 11.5–15.5cm circumference).
Frequently Asked Questions
Is the Samsung Galaxy Watch 4 - Wi-Fi · 40mm bigger than the Samsung Galaxy Watch7 - LTE · 40mm?
Both have a 40.4mm case. Compare their thickness and lug-to-lug above to judge wrist presence.
Which fits a smaller wrist better, the Samsung Galaxy Watch 4 - Wi-Fi · 40mm or the Samsung Galaxy Watch7 - LTE · 40mm?
The Samsung Galaxy Watch 4 - Wi-Fi · 40mm suits wrists around 41–56mm wide, and the Samsung Galaxy Watch7 - LTE · 40mm around 43–58mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Samsung Galaxy Watch 4 - Wi-Fi · 40mm and Samsung Galaxy Watch7 - LTE · 40mm 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.