CSS viewport reference
- iPhone 15 / 15 Pro
- 393 × 852 CSS px
- iPhone 15 Plus
- 430 × 932 CSS px
Phone and foldable comparisons
iPhone 15 vs iPhone 15 Plus Screen Comparison
Compare iPhone 15 and iPhone 15 Plus viewport references for mobile layouts, screenshots, and responsive QA.
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 15 / 15 Pro
- 1,179 × 2,556 px
- iPhone 15 Plus
- 1,290 × 2,796 px
Diagonal
- iPhone 15 / 15 Pro
- 6.1 inches
- iPhone 15 Plus
- 6.7 inches
Calculated panel size
- iPhone 15 / 15 Pro
- 5.5 × 2.6 inches
- iPhone 15 Plus
- 6.1 × 2.8 inches
Calculated screen area
- iPhone 15 / 15 Pro
- 14.2 square inches
- iPhone 15 Plus
- 17.1 square inches
Pixel density
- iPhone 15 / 15 Pro
- 460 PPI
- iPhone 15 Plus
- 460 PPI
Aspect ratio
- iPhone 15 / 15 Pro
- 19.5:9
- iPhone 15 Plus
- 19.5:9
Device pixel ratio
- iPhone 15 / 15 Pro
- DPR 3
- iPhone 15 Plus
- DPR 3
Decision guide
Choose the screen that fits the task
More compact reach and narrower iPhone QA case. By contrast, Larger reading, media and long-viewport canvas. Screen size changes reach and content space, while live Safari state still varies.
Choose iPhone 15 / 15 Pro when
- More compact reach and narrower iPhone QA case.
- People whose space, workflow or test coverage is better represented by Iphone 15 Screen Size.
Choose iPhone 15 Plus when
- Larger reading, media and long-viewport canvas.
- People whose space, workflow or test coverage is better represented by Iphone 15 Plus 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 15 / 15 Pro
iPhone · DPR 3 · 460 PPI
—
iPhone 15 Plus
iPhone · DPR 3 · 460 PPI
Proportional comparison of iPhone 15 / 15 Pro and iPhone 15 Plus using physical screen dimensions, CSS viewport references, or native pixel grids.
Decision factors
What materially changes between these displays?
Primary advantage
- iPhone 15 / 15 Pro
- More compact reach and narrower iPhone QA case
- iPhone 15 Plus
- Larger reading, media and long-viewport canvas
Screen size changes reach and content space, while live Safari state still varies.
Responsive-testing role
- iPhone 15 / 15 Pro
- Use Iphone 15 Screen Size as one documented layout scenario
- iPhone 15 Plus
- Use Iphone 15 Plus 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 15 / 15 Pro
- Keep native pixels, CSS viewport and physical size separate
- iPhone 15 Plus
- 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 15 Screen Size
- Why
- More compact reach and narrower iPhone QA case.
- Limitation
- Confirm product-specific ergonomics, performance and live viewport behavior separately.
Priority matches the second option
- Recommended
- Iphone 15 Plus Screen Size
- Why
- Larger reading, media and long-viewport canvas.
- 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?
- Screen size changes reach and content space, while live Safari state still varies.
- 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 15 Screen Size reviewed device record
Left-side hardware facts, calculation basis, source link and viewport limitations.
Reviewed ScreenMetricLab recordChecked 2026-09-20
Iphone 15 Plus 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
Does iPhone 15 Plus show more webpage content?
Usually yes because it has a larger viewport reference, but browser UI and zoom settings can still affect the live viewport.
Is the DPR the same?
Both references can use similar DPR behavior, but size and resolution still differ.
Which one should I use for QA?
Use both a standard iPhone and a larger iPhone reference for important mobile flows.
Continue the cluster
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