Resize a Photo to A1 Without Cropping
A1 (23.39×33.11 inches) = 7,016 × 9,933 px at 300 DPI, or 3,508 × 4,967 px for a print viewed from a step away (150 DPI).
A1 is 594×841 mm, about 23.4×33.1 inches: the big poster of choice for exhibitions, schools and events everywhere that uses metric paper. Upload a photo below and we'll extend it to A1's shape and rebuild it at poster scale.
Drop images, or click to browseTap to choose photos
JPG, PNG, HEIC, WEBP (up to 50MB each) · up to 5 at once
Free preview · No account needed · Deleted after 48 hours · Never used to train AI
Set to A1 (23.39×33.11 inches) — 7,016 × 9,933 px at 300 DPI. You can change it after uploading.
Why A1 Cuts Things Off
A1 is four A3 sheets, and at 300 DPI it would need 7,016×9,933 pixels, about 70 megapixels. Nobody looks at an A1 poster from a hand's length, though: from a couple of metres the eye resolves well under 100 pixels per inch. We deliver about 3,362×4,759, roughly 144 per inch, which is sharp from where people stand to read a poster. The shape is the other issue: A1 is 1:1.41, so a phone or camera photo loses about six percent off two edges unless the scene is extended.
Instead of trimming your photo down to the shape, we generate more of the scene around it until it fits — and sharpen the whole image in the same pass.
Where A1 shows up
- Exhibition, conference and school posters
- Event and wedding welcome boards
- Architectural and engineering drawings
- Large framed art prints in metric frames
Pixels an A1 print needs
- Sharp in your hand (300 DPI)
- 7,016 × 9,933 px
- Sharp on a wall (150 DPI)
- 3,508 × 4,967 px
A smaller photo still prints, just softer. Check yours against every size on the print size chart. Changing the DPI setting alone doesn’t add pixels: how to convert an image to 300 DPI.
A1 Questions
What size is an A1 poster in inches?
23.39×33.11 inches (594×841 mm). It is twice the area of A2 and half of A0.
How many pixels do I need for an A1 poster?
3,508×4,967 pixels at 150 DPI, which looks sharp from a step back. 7,016×9,933 is the full 300 DPI figure, rarely needed at this size.
Is a phone photo big enough for A1?
A 12-megapixel phone photo is about 129 pixels per inch at A1, fine from across a room. Upscaled, it is about 144 and crisper on edges and text.
More answers on the Resly AI FAQ.