CSS viewport reference
- iPhone SE 3rd gen
- 375 × 667 CSS px
- iPhone 16
- 393 × 852 CSS px
Phone and foldable comparisons
iPhone SE vs iPhone 16 Screen Comparison
Compare iPhone SE and iPhone 16 references to see how small-screen layouts differ from modern full-screen iPhone layouts.
Reviewed by ScreenMetricLab Editorial Team
Updated 2026-09-20
At a glance
Measured screen and viewport differences
Values combine reference display records and calculated geometry. Rounded corners, cutouts, hinges, browser UI, and device modes can change the usable area.
Physical resolution
- iPhone SE 3rd gen
- 750 × 1,334 px
- iPhone 16
- 1,179 × 2,556 px
Diagonal
- iPhone SE 3rd gen
- 4.7 inches
- iPhone 16
- 6.1 inches
Calculated panel size
- iPhone SE 3rd gen
- 4.1 × 2.3 inches
- iPhone 16
- 5.5 × 2.6 inches
Calculated screen area
- iPhone SE 3rd gen
- 9.4 square inches
- iPhone 16
- 14.2 square inches
Pixel density
- iPhone SE 3rd gen
- 326 PPI
- iPhone 16
- 460 PPI
Aspect ratio
- iPhone SE 3rd gen
- 16:9
- iPhone 16
- 19.5:9
Device pixel ratio
- iPhone SE 3rd gen
- DPR 2
- iPhone 16
- DPR 3
Decision guide
Choose the screen that fits the task
Short compact viewport for stress testing. By contrast, Modern taller viewport and current hardware context. Use the SE to expose crowding and the iPhone 16 to check newer safe-area behavior.
Choose iPhone SE 3rd gen when
- Short compact viewport for stress testing.
- People whose space, workflow or test coverage is better represented by Iphone Se 3rd Gen Screen Size.
Choose iPhone 16 when
- Modern taller viewport and current hardware context.
- People whose space, workflow or test coverage is better represented by Iphone 16 Screen Size.
Visual comparison
Compare screen shapes
Compare physical screen proportions and native pixel grids, or switch to CSS viewport references for responsive-layout work. Every drawing uses one shared scale so the relative size remains meaningful.
Left device
Right device
CSS viewport comparison
Compare two devices to see the relative area.
—
iPhone SE 3rd gen
iPhone · DPR 2 · 326 PPI
—
iPhone 16
iPhone · DPR 3 · 460 PPI
Proportional comparison of iPhone SE 3rd gen and iPhone 16 using physical screen dimensions, CSS viewport references, or native pixel grids.
Decision factors
What materially changes between these displays?
Primary advantage
- iPhone SE 3rd gen
- Short compact viewport for stress testing
- iPhone 16
- Modern taller viewport and current hardware context
Use the SE to expose crowding and the iPhone 16 to check newer safe-area behavior.
Responsive-testing role
- iPhone SE 3rd gen
- Use Iphone Se 3rd Gen Screen Size as one documented layout scenario
- iPhone 16
- Use Iphone 16 Screen Size as a distinct adjacent scenario
Test real content and neighboring widths; neither record is a universal breakpoint or a substitute for a measured browser state.
Measurement boundary
- iPhone SE 3rd gen
- Keep native pixels, CSS viewport and physical size separate
- iPhone 16
- Keep native pixels, CSS viewport and physical size separate
Window size, zoom, operating-system scaling, browser controls and accessibility settings can change usable webpage space.
Scenario matrix
Which option wins for common use cases?
A winner applies only to the stated task. Read the limitation before treating it as a complete product recommendation.
Priority matches the first option
- Recommended
- Iphone Se 3rd Gen Screen Size
- Why
- Short compact viewport for stress testing.
- Limitation
- Confirm product-specific ergonomics, performance and live viewport behavior separately.
Priority matches the second option
- Recommended
- Iphone 16 Screen Size
- Why
- Modern taller viewport and current hardware context.
- Limitation
- The larger or denser reference is not automatically better for every space or task.
Responsive QA coverage
- Recommended
- Test both references
- Why
- The pair exposes different layout pressures and helps prevent optimization around a single width.
- Limitation
- Emulation checks geometry only; important journeys still need representative browsers and input methods.
Practical considerations
What should you verify before deciding?
- Use the SE to expose crowding and the iPhone 16 to check newer safe-area behavior.
- Compare CSS viewport values for layout work and native pixels for hardware or media context; do not use them interchangeably.
- Record browser, operating system, scaling, zoom, orientation and window state when a comparison informs release QA.
- For a purchase, verify exact model dimensions, ergonomics, ports, performance, warranty and accessibility needs separately.
Methodology and sources
Calculation method and evidence
Physical dimensions are calculated from diagonal and aspect ratio. Named-product hardware claims use manufacturer specifications; CSS viewports remain practical browser references.
How the geometry is calculated
Width and height divide the diagonal using the stated aspect ratio. Screen area is width × height, and PPI divides the diagonal pixel count by the diagonal inches.
First-party calculation and editorial methodChecked 2026-09-20
ScreenMetricLab display calculation and review methodology
Calculated geometry, normalized comparison fields, source hierarchy and interpretation limits.
Reviewed ScreenMetricLab recordChecked 2026-09-20
Iphone Se 3rd Gen Screen Size reviewed device record
Left-side hardware facts, calculation basis, source link and viewport limitations.
Reviewed ScreenMetricLab recordChecked 2026-09-20
Iphone 16 Screen Size reviewed device record
Right-side hardware facts, calculation basis, source link and viewport limitations.
Reviewed under the ScreenMetricLab methodology and editorial policy. Reference values are not a substitute for checking the exact model, browser, scaling, and accessibility settings you will use.
Frequently asked questions
Questions about this comparison
Should I still test iPhone SE sizes?
Yes. Small viewports can reveal cramped layouts, hidden CTAs, and vertical spacing problems.
Why does iPhone SE matter if newer phones are larger?
Many users still have compact phones or use accessibility settings that reduce available space.
Which bugs appear on smaller phones?
Common issues include overlapped buttons, too-tall modals, hidden submit buttons, and unreadable forms.
Continue the cluster
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