A micron is a micrometer (µm) — one millionth of a meter, or one thousandth of a millimeter.

Why do I need DPI to convert pixels to microns?

Pixels have no physical size on their own. DPI/PPI defines how many pixels fit in one inch, which pins each pixel to a real length (25,400 ÷ DPI microns).

Is DPI the same as PPI here?

For this conversion, yes — both mean pixels (or dots) per inch, so you can enter either.

Does this tool upload my data?

No. Everything runs right in your browser, so your data never leaves your device — it even works offline once the page has loaded.

🔬 Pixel ↔ Micron Converter

Convert between pixels and microns (µm) at any resolution. Enter a DPI or PPI value, type a pixel count or a micron measurement, and Toolio instantly shows the other — plus the pixel size (microns per pixel) and the physical size in millimeters and inches. Handy for print, imaging, microscopy, MLCC and electronic-component inspection, camera and display sensors, and PCB work. Runs entirely in your browser.

Resolution (DPI / PPI)

Pixels (px)

⇅

Microns (µm)

Pixel size

—

Physical size (mm)

—

Physical size (in)

—

How it works

Pixels only map to a physical size once you fix a resolution. DPI (dots per inch) or PPI (pixels per inch) sets how many pixels span one inch, and one inch equals 25,400 microns (µm). So microns = pixels × 25,400 ÷ DPI, and pixels = microns × DPI ÷ 25,400. Everything runs in your browser.

Private by design. This tool runs entirely in your browser — nothing you enter is uploaded or stored, and it works offline.

About

Pixels are unitless until you fix a resolution, so a pixel-to-micron conversion always depends on DPI (dots per inch) or PPI (pixels per inch). Because one inch is exactly 25,400 microns, the pixel size is 25,400 ÷ DPI microns, microns = pixels × 25,400 ÷ DPI, and pixels = microns × DPI ÷ 25,400. This tool is bidirectional — edit either field and the other updates live — and it also reports the physical size in millimeters and inches so you can sanity-check scans, MLCC dielectric layer thickness, sensor pitches, and print dimensions. Common DPI presets (72, 96, 150, 300, 600, 1200, 2400) are one click away.

How to use

Set the resolution in DPI or PPI (or tap a preset like 300).
Type a value in Pixels or in Microns — the other field updates instantly.
Read the pixel size (µm/px) and the physical size in mm and inches.
Click 'Copy result' to copy the conversion with its DPI.

FAQ

What is a micron?: A micron is a micrometer (µm) — one millionth of a meter, or one thousandth of a millimeter.
Why do I need DPI to convert pixels to microns?: Pixels have no physical size on their own. DPI/PPI defines how many pixels fit in one inch, which pins each pixel to a real length (25,400 ÷ DPI microns).
Is DPI the same as PPI here?: For this conversion, yes — both mean pixels (or dots) per inch, so you can enter either.
Does this tool upload my data?: No. Everything runs right in your browser, so your data never leaves your device — it even works offline once the page has loaded.