iPhoneiOS · phone · 2024

iPhone 16 viewport size

393 × 852CSS px · 3× DPR · 1179×2556 physical

The iPhone 16 gives web pages a 393 × 852 CSS pixel viewport in portrait. That’s the width your layout and media queries actually see, not the 1179 × 2556 physical pixels of the screen: with a device pixel ratio of 3, every CSS pixel is 3 × 3 real pixels.

CSS viewport (portrait)393 × 852what web pages get

Landscape852 × 393phones and tablets turned sideways

Device pixel ratio3×1 CSS px = 3 × 3 screen pixels

Physical resolution1179 × 25566.1″ screen

Visible in the browser393 × 699Safari (iOS 26), first load

Released2024iOS phone

See your site on an iPhone 16

Paste your address (or localhost:3000). doesitfit shows it at exactly 393 × 852, with Safari (iOS 26)’s bars if you want them, and tells you if anything spills.

Free, no sign-up. Or ask Claude, ChatGPT or Codex to check it.

What a web page actually sees

The full viewport is 393 × 852, but the browser’s own bars take some of it. In Safari (iOS 26) a page gets about 393 × 699 on first load (59px status bar and Safari’s 94px bottom tab bar on first load; the bars shrink when you scroll). That’s your real “above the fold”. Use 100dvh instead of 100vh for full-height sections, or they’ll hide behind the toolbar (why).

Setting	Width	Height
Full viewport (portrait)	393px	852px
Visible on first load (Safari (iOS 26))	393px	699px
Landscape (full)	852px	393px

What it means for your CSS

Breakpoints

At 393px: Tailwind uses base styles only (below sm, 640px); Bootstrap uses xs. In landscape (852px): Tailwind uses md (sm: md: styles apply), Bootstrap md.

Tailwind breakpoints on real devices

Content width

With 16px of padding on each side your text column is 361px; with 24px it’s 345px. Text closer than 8px to the edge looks cramped (more).

Sharp images

A full-width image needs about 1179px of real pixels (393 × 3).

<img src="hero-1179.jpg"
  srcset="hero-800.jpg 800w, hero-1179.jpg 1179w"
  sizes="100vw" alt="…">

Styles for this width

Content-first breakpoints beat device lists, but if something breaks at this width:

@media (max-width: 393px) {
  /* screens 393px wide and narrower */
}

Other display size settings

The scaling the owner picks changes the viewport your site gets:

Setting	CSS viewport	DPR
Default (Standard) (default)	393 × 852	3
Display Zoom: Larger Text	320 × 693	3

How common is 393 × 852?

393 × 852 is the #11 most common phone screen size worldwide, with 1.9% of mobile traffic (Aug 2026, StatCounter).

Same viewport:

Close in size:

Compare:

Everything about the 393 × 852 viewport · All devices 393px wide · All iPhone sizes

Questions people ask

What is the viewport size of the iPhone 16?

393 × 852 CSS pixels in portrait (852 × 393 in landscape), with a device pixel ratio of 3. The screen itself is 1179 × 2556 physical pixels.

How much of the iPhone 16 screen does a web page get in Safari?

About 393 × 699 on first load: the 59px status bar and Safari’s 94px bottom tab bar on first load; the bars shrink when you scroll. Design your first screen for that height, not the full 852px.

Which CSS breakpoint does the iPhone 16 fall into?

At 393px wide, Tailwind CSS uses base styles only (below sm, 640px) and Bootstrap uses its xs tier. In landscape (852px) Tailwind uses md (sm: md: styles apply).

How wide should images be for the iPhone 16?

A full-width image needs about 1179px of real pixels (393 CSS px × DPR 3) to look sharp. Use srcset so smaller screens don’t download it.

How can I test my website on an iPhone 16 without one?

Open doesitfit.lol, paste your address (localhost works too) and pick the iPhone 16. It shows your site at exactly 393 × 852 CSS pixels and flags anything that spills past the edge.

Guides that help

About these numbers

Confidence: High: confirmed by more than one independent source.

Sources include DeviceAtlas, Chrome DevTools device list (EmulatedDevices.ts), iosref.com, ios-resolution.com. Researched September 2026.