Megapixel Calculator
Calculate megapixels from image pixel dimensions. Turn any width and height into the standard camera and sensor spec. Free, instant, private in-browser.
Turn any pixel width and height into a megapixel count, the standard spec for cameras and sensors. Enter the dimensions and the calculator returns the megapixels instantly, so you can compare camera resolutions.
How it works
What this calculator does
Turn any pixel width and height into a megapixel count, the standard spec for cameras and sensors. Enter the dimensions and the calculator returns the megapixels instantly, so you can compare camera resolutions.
Why the math matters
Accurate numbers prevent costly print and storage mistakes.
Frequently asked questions
How do I calculate megapixels?
Multiply width by height in pixels and divide by one million. For example, 4000 by 3000 equals 12 megapixels.
How many megapixels do I need for a print?
An 8 by 10 print at 300 DPI needs about 7.2 megapixels, while a 4 by 6 only needs about 2 megapixels.
Does more megapixels always mean better photos?
Not always. More megapixels capture more detail, but sensor size and lens quality matter more for low light and sharpness.