iPad Pro 12.9-inch vs iPad Pro 13-inch M4: screen size and viewport

The iPad Pro 12.9-inch lays web pages out at 1024 × 1366 CSS px with a pixel ratio of 2; the iPad Pro 13-inch M4 at 1032 × 1376 with 2. The iPad Pro 13-inch M4 is 8 px wider and 10 px taller.

The two screens side by side

Specs compared

CSS px are the units media queries see. Visible heights subtract the status bar and the Safari on iPadOS bars as set in our device profiles; real bar heights vary with settings and scrolling. The release year is that of the first model with each screen.

What this means for your layout

How the width difference affects your layout

The iPad Pro 13-inch M4 is 8 CSS px wider (1032 vs 1024, 1% more). No common breakpoint falls between 1024 and 1032 px, so with typical media queries both get the same layout and the extra 8 pixels only stretch fluid columns, text lines and images.

In a 3-column card grid with 16 px page padding and 16 px gaps, each card is 322 px wide on the iPad Pro 13-inch M4 and 320 px on the iPad Pro 12.9-inch. Check that buttons, prices and long words still fit in the narrower one.

Pixel density and image sizes

Both draw each CSS pixel with 2 × 2 device pixels, so text and icons are equally sharp. A full-width image (sizes="100vw") needs about 2048 px on the iPad Pro 12.9-inch and 2064 px on the iPad Pro 13-inch M4 to look sharp.

With a srcset such as 640w, 828w, 1080w, 1290w, 1440w, 1640w, 2048w, the browser would normally pick the 2048w file on the iPad Pro 12.9-inch and the 2560w file on the iPad Pro 13-inch M4. Leave out the 2560w candidate and the iPad Pro 13-inch M4 upscales a smaller file.

How much fits above the fold

On first load about 1302 px of the page is visible on the iPad Pro 13-inch M4 and 1292 px on the iPad Pro 12.9-inch: 10 px less (1%) on the iPad Pro 12.9-inch. That's less than one line of body text, so in practice both show the same first screen.

In landscape

Turned sideways, the iPad Pro 12.9-inch is 1366 px wide and the iPad Pro 13-inch M4 1376 px. The visible height drops to about 950 and 958 px, so a 64 px sticky header covers 7% and 7% of the screen — under the 25% at which MobileCheck flags fixed bars covering the page.

Same browser engine

Both are Apple devices, so both render with WebKit, the engine behind Safari. Engine quirks are the same; the differences above come from size alone. Chrome DevTools only emulates the size and still draws with Chromium, so check Apple devices in a WebKit browser — see how to test on an iPhone.

More about these devices

• iPad Pro 12.9-inch viewport size — one screen for the iPad Pro 12.9" / iPad Air 13"
• iPad Pro 13-inch M4 viewport size — one screen for the iPad Pro 13" (M4 / M5)

Or open the free check with the iPad Pro 12.9-inch and the iPad Pro 13-inch M4 preselected: full-page screenshots in WebKit, with problems such as small text and crowded buttons highlighted.

Related comparisons

• iPad Pro 11-inch (2022) vs iPad Pro 13-inch (M4) — 834 vs 1032 px wide, 2× vs 2×
• iPad Pro 11-inch (M4) vs iPad Pro 13-inch (M4) — 834 vs 1032 px wide, 2× vs 2×

Compare other devices → · All mobile viewport sizes →