Image Resolution Guide
Upload an image to inspect its pixel resolution, megapixels, simplified aspect ratio, and physical print size at 72, 150, or 300 DPI.
Upload an image to inspect its dimensions, megapixels, aspect ratio, and print size.
Pixel and megapixel analysis
Read exact width and height and calculate total megapixels locally.
Aspect ratio
Reduce image dimensions to a clear width-to-height ratio.
Print-size planning
Compare physical dimensions at screen, poster, and high-quality print DPI.
它是如何運作的
- 1
上傳圖片
Choose an image from your device; it is decoded locally.
- 2
Choose DPI
Select 72, 150, or 300 DPI for physical-size calculations.
- 3
Download report
Save the resolution analysis as a text file.
Pixels, DPI, and print size
Pixel dimensions describe the actual image data. DPI only changes the intended physical print size unless the image is resampled. At 300 DPI, divide pixel dimensions by 300 to estimate high-quality print inches.
常見問題
Does changing DPI resize my image?
No. This guide calculates print size without changing pixel dimensions.
How many megapixels is an image?
Width multiplied by height, divided by one million.
我的圖片上傳了嗎？
不會。您的映像會保留在您的瀏覽器中。
Image Resolution Guide last reviewed: Aug 12, 2026.