What it does: enter a photo’s pixel dimensions, or pick a JPEG, PNG or WebP file so your browser reads them, then see the print density and crop for the paper you choose. This is arithmetic on pixel counts. It does not enhance the photo, judge sharpness or guarantee print quality.
Dimension checker
Check your photo
This checker needs JavaScript. Without it, divide each pixel dimension by the print size in inches, or use the tables below.
- Print density after crop
- ppi
- Image cropped to fill paper
- Enlargement needed per side
Limits: whole-number dimensions from 1 to 100,000 pixels; files up to 40 MB and 200 megapixels. For HEIC and other formats, enter the dimensions manually (in Photos, swipe up or tap ⓘ to see them).
How the checker works
Print density is pixels ÷ inches. The checker turns the paper to match your photo, scales the photo until it fills the paper without stretching, and reports the density of the pixels that remain. The crop figure is the share of the image trimmed away because the photo and paper have different shapes. If the density is below your target, it shows how much each side would need to grow.
It never looks at what is in the photo. Focus, noise, compression, the printer and viewing distance all affect how a print looks, and none of them are measured here.
Pixels needed to fill common prints
| 300 ppi | 240 ppi | 200 ppi | |
|---|---|---|---|
| 4 × 6 in | 1200 × 1800 | 960 × 1440 | 800 × 1200 |
| 5 × 7 in | 1500 × 2100 | 1200 × 1680 | 1000 × 1400 |
| 8 × 10 in | 2400 × 3000 | 1920 × 2400 | 1600 × 2000 |
| 11 × 14 in | 3300 × 4200 | 2640 × 3360 | 2200 × 2800 |
| A4 | 2481 × 3508 | 1985 × 2807 | 1654 × 2339 |
Worked examples at 300 ppi
Density after cropping to fill the paper, with the share of the image cropped away.
| Photo | 4 × 6 | 5 × 7 | 8 × 10 | 11 × 14 |
|---|---|---|---|---|
| 4032 × 3024 (12 MP phone) | 672 ppi, 11% crop | 576 ppi, 5% | 378 ppi, 6% | 275 ppi, 5% |
| 1080 × 1350 (social post) | 225 ppi, 17% | 193 ppi, 11% | 135 ppi, 0% | 96 ppi, 2% |
| 1920 × 1080 (HD frame) | 270 ppi, 16% | 216 ppi, 21% | 135 ppi, 30% | 98 ppi, 28% |
| 640 × 480 (old camera) | 107 ppi, 11% | 91 ppi, 5% | 60 ppi, 6% | 44 ppi, 5% |
A 12 MP phone photo already passes 300 ppi at 8 × 10, so more pixels are not what it needs. A 640 × 480 file would need about 2.8× per side for a 4 × 6 at 300 ppi; that is pixel arithmetic only, and a small old file may still print soft after any upscale.
What this means for upscaling
Upscaling adds pixels using estimated detail; it cannot recover detail that was never captured. Local Photo Upscaler enlarges up to 4× per side with an output cap near 17 MP, and very large photos may be processed at a smaller size, so the exact output size is not promised. Read the saved file’s actual dimensions, run them through this checker again, and order a small test print before a large one.
This page has no upload step. A selected photo is opened with a temporary local link that is released as soon as its dimensions are read, and the file name, contents, camera data and dimensions are never stored or sent anywhere. Optional site analytics, if you allow them, measure site visits and link clicks; photo files, names and dimensions are never included. Read see the privacy policy.