Native resolution 640 × 960 px at 2× · 326 PPI · 3.5″ · 2:3. Design at 320 × 480 and export assets at 2×.
| Property | Value |
|---|---|
| CSS viewport (portrait) | 320 × 480 px |
| CSS viewport (landscape) | 480 × 320 px |
| Native resolution | 640 × 960 px |
| Device pixel ratio | 2× |
| Pixel density | 326 PPI |
| Screen diagonal | 3.5 in |
| Panel size | 1.96 × 2.94 in |
| Aspect ratio | 2:3 |
| Total pixels | 0.61 MP |
| Released | 2010 |
| Operating system | iOS |
| Safe area (top / bottom) | 20 / 0 px |
Among the 130 phones on this site, the iPhone 4 has the 130th largest CSS viewport area. Its 320 px width is 79 px below the 399 px average for this category.
Targeting the iPhone 4 in CSS
Device-specific media queries are brittle — a new model with the same width will not match. Use them for genuine per-device fixes only, and prefer width buckets for layout.
/* Target iPhone 4 specifically */
@media only screen
and (device-width: 320px)
and (device-height: 480px)
and (-webkit-device-pixel-ratio: 2) {
/* … */
}
/* More useful in practice — the width bucket it falls into */
@media (min-width: 320px) { /* … */ }Safe area on the iPhone 4
Home button, status bar only. Content placed inside the top 20 px or the bottom 0 px will sit under system UI unless you inset it.
/* iPhone 4 safe area — requires viewport-fit=cover */
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
.app {
padding-top: env(safe-area-inset-top); /* 20px */
padding-bottom: env(safe-area-inset-bottom); /* 0px */
padding-left: env(safe-area-inset-left);
padding-right: env(safe-area-inset-right);
}Compare with other iPhone models
| Device | CSS viewport | Native | DPR | PPI | Diagonal |
|---|---|---|---|---|---|
| iPhone 4 | 320 × 480 | 640 × 960 | 2× | 326 | 3.5″ |
| iPhone 4s | 320 × 480 | 640 × 960 | 2× | 326 | 3.5″ |
| iPhone 5 | 320 × 568 | 640 × 1136 | 2× | 326 | 4″ |
| iPhone 5s | 320 × 568 | 640 × 1136 | 2× | 326 | 4″ |
| iPhone 5c | 320 × 568 | 640 × 1136 | 2× | 326 | 4″ |
| iPhone 6 | 375 × 667 | 750 × 1334 | 2× | 326 | 4.7″ |
| iPhone 6 Plus | 414 × 736 | 1080 × 1920 | 3× | 401 | 5.5″ |
| iPhone 6s | 375 × 667 | 750 × 1334 | 2× | 326 | 4.7″ |
| iPhone 6s Plus | 414 × 736 | 1080 × 1920 | 3× | 401 | 5.5″ |
Questions about the iPhone 4 screen
What is the screen size of the iPhone 4?
The iPhone 4 has a 3.5-inch display. In CSS the viewport measures 320 × 480 px in portrait, and the panel itself has 640 × 960 physical pixels at 326 PPI.
What resolution should I design for on the iPhone 4?
Design at 320 × 480 and export assets at 2×. That gives you 640 × 960 px images, which is exactly what the panel renders. Designing directly at 640 × 960 means every measurement is 2 times larger than the CSS values you will write.
What is the device pixel ratio of the iPhone 4?
The iPhone 4 reports a device pixel ratio of 2. One CSS pixel therefore covers 4 device pixels. You can read it in JavaScript with window.devicePixelRatio.
What are the safe area insets on the iPhone 4?
In portrait the safe area inset is 20 px at the top and 0 px at the bottom (Home button, status bar only). Use env(safe-area-inset-*) rather than hard-coding these — the values change per device and per orientation.
Which other devices have the same viewport as the iPhone 4?
1 other device shares the 320 × 480 CSS viewport: iPhone 4s. A layout that works on one works on all of them.
Related
window.innerWidth/innerHeight reported by the stock browser with no browser chrome. See methodology and sources.