PowerPoint Slide Sizes in Inches, Centimetres and Pixels
The default PowerPoint slide is Widescreen 16:9: 13.333 × 7.5 inches (33.867 × 19.05 cm), which exports as 1280 × 720 pixels at PowerPoint’s default 96 DPI. The older Standard 4:3 slide is 10 × 7.5 inches (25.4 × 19.05 cm), or 960 × 720 pixels. Every preset for PowerPoint, Google Slides and Keynote is in the tables below, and the calculator converts any size between units.
Slide size calculator
Pick a preset or type your own width and height. The result updates as you type, in every unit a presentation app or a .pptx file uses.
Result
- inches
- 13.333 × 7.5
- centimetres
- 33.867 × 19.05
- millimetres
- 338.67 × 190.5
- Pixels at 96 DPI
- 1280 × 720
- points
- 960 × 540
- EMU
- 12192000 × 6858000
- Aspect ratio
- 16:9
PowerPoint slide size presets
These are the options under Design → Slide Size → Custom Slide Size → “Slides sized for”. Pixel sizes assume the default 96 DPI export.
| Preset | Inches | Centimetres | Pixels at 96 DPI | Ratio | EMU (in the .pptx file) |
|---|---|---|---|---|---|
| Widescreen (16:9)Default for new decks since PowerPoint 2013 | 13.333 × 7.5 | 33.867 × 19.05 | 1280 × 720 | 16:9 | 12192000 × 6858000 |
| On-screen Show (4:3)The “Standard” option; default before 2013 | 10 × 7.5 | 25.4 × 19.05 | 960 × 720 | 4:3 | 9144000 × 6858000 |
| On-screen Show (16:9)Same shape as Widescreen, smaller canvas | 10 × 5.625 | 25.4 × 14.288 | 960 × 540 | 16:9 | 9144000 × 5143500 |
| On-screen Show (16:10) | 10 × 6.25 | 25.4 × 15.875 | 960 × 600 | 16:10 | 9144000 × 5715000 |
| Letter Paper (8.5×11 in)Not the full sheet: leaves a print margin | 10 × 7.5 | 25.4 × 19.05 | 960 × 720 | 4:3 | 9144000 × 6858000 |
| Ledger Paper (11×17 in) | 13.319 × 9.99 | 33.831 × 25.374 | 1279 × 959 | 4:3 | 12179300 × 9134475 |
| A3 Paper (297×420 mm) | 14 × 10.5 | 35.56 × 26.67 | 1344 × 1008 | 4:3 | 12801600 × 9601200 |
| A4 Paper (210×297 mm)Not the full sheet: true A4 is 29.7 × 21 cm | 10.833 × 7.5 | 27.517 × 19.05 | 1040 × 720 | 13:9 | 9906000 × 6858000 |
| B4 (ISO) Paper (250×353 mm) | 11.84 × 8.88 | 30.074 × 22.556 | 1137 × 853 | 4:3 | 10826750 × 8120063 |
| B5 (ISO) Paper (176×250 mm) | 7.84 × 5.88 | 19.914 × 14.936 | 753 × 565 | 4:3 | 7169150 × 5376863 |
| 35 mm Slides | 11.25 × 7.5 | 28.575 × 19.05 | 1080 × 720 | 3:2 | 10287000 × 6858000 |
| Overhead | 10 × 7.5 | 25.4 × 19.05 | 960 × 720 | 4:3 | 9144000 × 6858000 |
| Banner | 8 × 1 | 20.32 × 2.54 | 768 × 96 | 8:1 | 7315200 × 914400 |
Google Slides page sizes
Set under File → Page setup. Google Slides uses a 10-inch-wide canvas for all three presets, so its 16:9 slide is smaller than PowerPoint’s Widescreen even though the shape is identical.
| Preset | Inches | Centimetres | Pixels at 96 DPI | Ratio |
|---|---|---|---|---|
| Widescreen 16:9Default for new presentations | 10 × 5.625 | 25.4 × 14.288 | 960 × 540 | 16:9 |
| Standard 4:3 | 10 × 7.5 | 25.4 × 19.05 | 960 × 720 | 4:3 |
| Widescreen 16:10 | 10 × 6.25 | 25.4 × 15.875 | 960 × 600 | 16:10 |
Keynote slide sizes
Keynote measures slides in points. Set under Document → Slide Size; “Custom Slide Size” accepts any width and height.
| Preset | Points | Ratio |
|---|---|---|
| Wide (16:9) | 1920 × 1080 | 16:9 |
| Standard (4:3) | 1024 × 768 | 4:3 |
Slide size for an exact pixel size
PowerPoint saves pictures at 96 DPI unless you change it, so divide the pixels you need by 96 to get the slide size in inches. Type that into Custom Slide Size and the export comes out at exactly the target.
| Target | Pixels | Set slide to (inches) | Set slide to (cm) |
|---|---|---|---|
| HD video (720p) | 1280 × 720 | 13.3333 × 7.5 | 33.867 × 19.05 |
| Full HD video (1080p) | 1920 × 1080 | 20 × 11.25 | 50.8 × 28.575 |
| 4K UHD video | 3840 × 2160 | 40 × 22.5 | 101.6 × 57.15 |
| Square post (1:1) | 1080 × 1080 | 11.25 × 11.25 | 28.575 × 28.575 |
| Portrait post or carousel (4:5) | 1080 × 1350 | 11.25 × 14.0625 | 28.575 × 35.719 |
| Vertical video or story (9:16) | 1080 × 1920 | 11.25 × 20 | 28.575 × 50.8 |
Pixel size at higher export resolutions
The same slide exports at more pixels when the export resolution is raised. Widescreen at 144 DPI is exactly 1920 × 1080.
| Slide | 96 DPI | 150 DPI | 220 DPI | 300 DPI |
|---|---|---|---|---|
| Widescreen (16:9) | 1280 × 720 | 2000 × 1125 | 2933 × 1650 | 4000 × 2250 |
| On-screen Show (4:3) | 960 × 720 | 1500 × 1125 | 2200 × 1650 | 3000 × 2250 |
Unit conversions
- 1 inch = 2.54 cm = 72 points = 914,400 EMU
- 1 cm = 360,000 EMU
- 1 point = 12,700 EMU
- 1 pixel at 96 DPI = 9,525 EMU (0.75 points)
- Pixels = inches × DPI
Four things that catch people out
- The “A4 Paper” preset is not A4. It is 27.517 × 19.05 cm, which leaves a margin for desktop printers. A real A4 sheet is 29.7 × 21 cm (11.693 × 8.268 in). For edge-to-edge A4, enter that as a custom size. “Letter Paper” works the same way: the preset is 10 × 7.5 in, the full sheet is 11 × 8.5 in.
- Widescreen and On-screen Show (16:9) are different sizes. Both are 16:9, but one is 13.333 inches wide and the other 10. Text set at 24 pt fills more of the smaller slide, so slides pasted between the two look scaled up or down.
- Changing the size after designing moves things. PowerPoint asks whether to Maximize or Ensure Fit, and either choice can shift or stretch pictures and text boxes. Choose the size before building the deck.
- There is a limit. PowerPoint accepts 1 to 56 inches (2.54 to 142.24 cm) per side. For a larger poster, design at half size and print at 200%.
Where to change the slide size
- PowerPoint: Design → Slide Size → Custom Slide Size (on a Mac: Page Setup).
- Google Slides: File → Page setup → Custom.
- Keynote: Document → Document tab → Slide Size → Custom Slide Size.
Frequently asked questions
What is the default PowerPoint slide size?
13.333 × 7.5 inches (33.867 × 19.05 cm), a 16:9 shape PowerPoint calls Widescreen. It has been the default since PowerPoint 2013. Earlier versions defaulted to 10 × 7.5 inches (4:3).
What is the PowerPoint slide size in pixels?
1280 × 720 pixels for a Widescreen slide and 960 × 720 for a 4:3 slide, at PowerPoint’s default export resolution of 96 DPI. A slide has no fixed pixel size: the same Widescreen slide exports at 4000 × 2250 pixels at 300 DPI.
How do I make a 1920 × 1080 slide in PowerPoint?
Set a custom slide size of 20 × 11.25 inches (50.8 × 28.575 cm); at the default 96 DPI it exports at exactly 1920 × 1080 pixels. Alternatively keep the default 13.333 × 7.5 inch slide and raise the export resolution to 144 DPI.
What size is a Google Slides slide?
10 × 5.625 inches (25.4 × 14.288 cm) for the default 16:9 slide, which Google Slides also shows as 960 × 540 pixels. The 4:3 option is 10 × 7.5 inches and the 16:10 option is 10 × 6.25 inches.
Is PowerPoint’s A4 slide size the same as A4 paper?
No. The “A4 Paper” preset is 27.517 × 19.05 cm, smaller than a real A4 sheet at 29.7 × 21 cm, so that the slide fits inside a printer’s margins. For a slide that fills the whole sheet, enter 29.7 × 21 cm as a custom size.
What is an EMU in a PowerPoint file?
The English Metric Unit, the unit a .pptx file uses to store sizes and positions. There are 914,400 EMU in an inch, 360,000 in a centimetre and 12,700 in a point, so all three convert to whole numbers. A Widescreen slide is 12,192,000 × 6,858,000 EMU.
Sources
Preset dimensions and the default export resolution are from Microsoft’s documentation:
- Change the size of your slides (Microsoft Support)
- How to export high-resolution slides from PowerPoint (Microsoft Learn)
Using this page
You are welcome to link to this page or quote its tables with attribution to Sharayeh.