Megapixel Dimensions
Resolve a pixel width and height from a megapixel count and aspect ratio.
About Megapixel Dimensions
With the aspect ratio fixing the width-to-height relationship, the square root of megapixels divided by that ratio recovers the pixel dimensions. Cameras advertise megapixels, but pixels per side decide sensor crops, lens coverage and how large the file prints at a given DPI.
Formula
Megapixel Dimensions
Height = sqrt(MP x 1,000,000 / ratio); width = height x ratio
- aspect
- Width-to-height relationship of the sensor or file
Worked example
With the default values below, Megapixel Dimensions returns Width of 6,000. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Megapixelsminimum 0.1 MP
- 24 MP
- Aspect ratioone of 3:2, 4:3, 16:9, 1:1
- 3:2
Results
- Width
- 6,000 px
- Height
- 4,000 px
- Width at 300 DPI
- 20.00 in
Step by step
- 1Values used
- 2Megapixel Dimensions
- 3Width= 6,000 px
- 4Height= 4,000 px
- 5Width at 300 DPI= 20.00 in
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Megapixel Dimensions calculated?
Height = sqrt(MP x 1,000,000 / ratio); width = height x ratio With the aspect ratio fixing the width-to-height relationship, the square root of megapixels divided by that ratio recovers the pixel dimensions.
Why does Megapixel Dimensions matter?
Cameras advertise megapixels, but pixels per side decide sensor crops, lens coverage and how large the file prints at a given DPI.
What values do I need to enter?
This calculator takes 2 inputs: Megapixels, Aspect ratio. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.