Centimeters to Pixels

• Measure in centimeters: Note your design dimensions in cm.
• Convert using the formula: px = cm × 300 ÷ 2.54, or approximately cm × 118.11.
• Apply to your export settings: Set the pixel dimensions in your design software for print-ready output.

The calculator updates without reloading the page. Choose a preset density or type the DPI/PPI supplied by your design application, printer, or project specification. Copy the result when you are ready to use it elsewhere.

Centimeters to pixels at 300 DPI converts metric measurements to pixels by first converting to inches, then multiplying by 300. For metric-based design, 1 cm = 0.393701 inches, so pixels = cm × 0.393701 × DPI. At 300 DPI, 1 cm = 118.11 pixels. This converter is essential for designers working with A4 (21×29.7 cm), A3, and other ISO paper formats.

DPI and PPI are density inputs. PPI describes image pixels per inch, while DPI technically describes printer dots per inch. They are often entered as the same planning value, but they refer to different output systems.

Convert a 10 cm design element to pixels at 300 DPI. Since 1 cm = 0.393701 inches, 10 cm at 300 DPI = 1,181 pixels.

The example uses 300 DPI as an illustrative density. Changing the DPI/PPI field changes the pixel-to-physical-size relationship, so use the value required by your own project.

These lookup values use the example density of 300 DPI. Use the calculator for any other density rather than treating the table as universal.

A centimeter is 1/100 of a meter in the metric system, equal to approximately 0.393701 inches. Most countries outside the US use metric measurements for print and design work.

To convert cm to pixels, you first convert centimeters to inches (divide by 2.54), then multiply by DPI. At 300 DPI: px = cm × 300 ÷ 2.54 = cm × 118.11.

Common ISO paper sizes in cm: A4 = 21.0×29.7 cm, A3 = 29.7×42.0 cm, A5 = 14.8×21.0 cm. At 300 DPI: A4 = 2,480×3,508 pixels, A3 = 3,508×4,961 pixels.

• Always use the exact conversion: Use cm × 300 ÷ 2.54 for best accuracy rather than the rounded 118.11 multiplier.
• A4 bleed: Add 3mm bleed on each side for professional A4 printing. That's 21.6×30.3 cm total.

A centimeter does not correspond to one permanent pixel count. The result depends on the density assigned to the finished image or output device. For a CSS layout, 96 PPI is the usual reference, while commercial print files are commonly prepared at 300 DPI. Drafts, newspaper artwork, and large posters may use a lower density because they are viewed differently. Confirm the required density with the printer, design brief, or export preset before converting a measurement.

Changing density changes the pixel result in direct proportion. A 10 cm width is about 378 pixels at 96 PPI, 591 pixels at 150 DPI, and 1,181 pixels at 300 DPI. None of those answers is universally correct; each describes the same physical width under a different output assumption. Record the density alongside the result so another designer can reproduce the calculation.

For a two-dimensional document, convert both width and height with the same DPI. An A4 page measures 21 by 29.7 cm before bleed. At 300 DPI, that is approximately 2,480 by 3,508 pixels. If a printer requests 3 mm bleed on every edge, the artwork becomes 21.6 by 30.3 cm because 0.3 cm is added to both sides of each dimension. Convert the expanded document size rather than adding an estimated number of pixels afterward.

Keep trim size, bleed size, and safe area separate in the source file. Bleed extends artwork beyond the cut line; the safe area keeps text and logos away from that line. The calculator supplies dimensions, but it cannot decide a printer's production tolerances. Use the printer's template whenever one is available and compare its final pixel dimensions with your calculation before export.

Centimeter conversions often produce decimal pixel values because 2.54 centimeters equals exactly one inch. Preserve the decimal result while planning and round only when an application requires whole pixels. Rounding each intermediate value can create mismatched edges, especially across grids, repeated labels, or multi-panel artwork. For raster image dimensions, rounding to the nearest whole pixel is normally appropriate; for vector layouts, retain the physical centimeter dimensions and let the export process rasterize them.

Also distinguish resizing from changing resolution metadata. Typing 300 DPI into an existing image does not create missing detail unless the software resamples it, and resampling invents pixels rather than recovering original information. Check the source pixel dimensions first, calculate the required output dimensions, and compare the two before deciding whether the file is suitable for the intended size.

The calculation assumes that the measurement and DPI/PPI value refer to the same output workflow. It performs a mathematical conversion; it does not inspect an image file, detect a screen's density, change image resolution, or predict print quality.

Real printed or displayed size can differ because of application scaling, printer drivers, operating-system scaling, browser zoom, resampling, cropping, or device settings. Presets are illustrative and are not live device measurements.

Conversions use exact unit relationships internally, preserve full numeric precision during calculation, and round only the displayed result. One inch equals exactly 25.4 millimeters, 2.54 centimeters, 72 typographic points, or 6 picas. Pixels require a DPI/PPI input because a pixel has no fixed physical length by itself.

Enter a non-negative centimeters value and a positive DPI/PPI value to calculate pixels. Keep the selected density with the copied result so the conversion can be reproduced later.

• Inches to pixels calculator
• All conversion calculators
• Inches and pixels formula guide
• Pixels to inches