Centimetres (cm) to pixels converter

Pixels = cm ÷ 2.54 × DPI. Enter a size and DPI to get pixels, or pixels to get the printed size. Example: 3.5 cm at 300 DPI = 413 px.

Size to pixels

WidthHeightUnit

DPI

413 × 531 px

Pixels to size

Pixels

at 300 DPI (set on the left)

5.08 cm · 50.8 mm · 2 in

Centimetres to pixels table

cm	72 DPI	96 DPI	150 DPI	300 DPI	600 DPI
1 cm	28 px	38 px	59 px	118 px	236 px
2 cm	57 px	76 px	118 px	236 px	472 px
2.5 cm	71 px	94 px	148 px	295 px	591 px
3 cm	85 px	113 px	177 px	354 px	709 px
3.5 cm	99 px	132 px	207 px	413 px	827 px
4 cm	113 px	151 px	236 px	472 px	945 px
4.5 cm	128 px	170 px	266 px	531 px	1063 px
5 cm	142 px	189 px	295 px	591 px	1181 px
6 cm	170 px	227 px	354 px	709 px	1417 px
10 cm	283 px	378 px	591 px	1181 px	2362 px
15 cm	425 px	567 px	886 px	1772 px	3543 px
21 cm	595 px	794 px	1240 px	2480 px	4961 px

Questions

How many pixels is 1 cm?

At 300 DPI, 1 cm is 118 pixels; at 96 DPI it is 38. Pixels depend on the DPI because a pixel has no fixed physical size.

What is the formula to convert centimetres to pixels?

Pixels = cm ÷ 2.54 × DPI, rounded to a whole pixel. For example 3.5 cm at 300 DPI is 413 pixels.

Which DPI should I use for a form photo?

Use the DPI your form or printer asks for. If none is given, 300 DPI is the usual choice for printed photos; screens and most online forms only check the pixel size.

Resize a photo to this size mm to pixels inch to pixels KB to MB