Turn any camera's megapixel count into an exact pixel width and height. Pick a sensor aspect ratio, watch the live 3D sensor stack fill in, and get your resolution instantly.
Megapixels only tell you total pixel count — the aspect ratio decides how those pixels are split between width and height. Here's the exact formula the calculator above runs.
Total px = MP × 1,000,000
One megapixel equals one million pixels. A 12 MP sensor captures roughly 12,000,000 individual pixels per photo.
Width = √(ratio × total px)
The aspect ratio (width ÷ height) determines how the total pixel count is distributed horizontally.
Height = √(total px ÷ ratio)
Dividing instead of multiplying by the ratio gives the vertical pixel count that completes the frame.
The most-used camera sensor sizes across smartphones, calculated at three standard aspect ratios.
| Megapixels | 3:2 | 4:3 | 16:9 |
|---|
Type a value in the MP field or drag the slider — anything from 0.3 MP up to 108 MP.
Choose 3:2, 4:3, 16:9, 1:1, or set a custom ratio for niche sensor shapes.
The exact width × height appears instantly, alongside a live sensor grid preview. Copy it in one tap.
Not necessarily. Resolution sets the pixel count, but sharpness also depends on sensor size, pixel size, lens quality, and image processing. A 50 MP sensor with tiny pixels can look softer than a well-tuned 12 MP sensor with larger pixels.
Because the aspect ratio changes how the same total pixel count is arranged. A 12 MP photo at 4:3 is squarer than a 12 MP photo at 16:9, which stretches the same pixels into a wider, shorter frame.
Most phone main cameras default to 4:3 for stills, since it matches the sensor's native shape, while 16:9 is common for wide shots and video framing. Check FSL-Specs.com's device pages for the exact primary sensor resolution and ratio of a specific phone.
More pixels generally means larger files, since there's simply more data to store per image, though compression format and detail level also play a big role in the final file size.