Pantone has limited the free online sites but you might be able to find some look-up tables somewhere. The conversion is not a simple mathematical transformation (as is RGB to HSV).
Pantone is system used to standardize color matching. Pantone colors are referenced by the TPX code. To convert Pantone TPX to CMYK, select an item, and then select "convert to CMYK" on the "edit" menu.
If you want to convert a DIC color to a Pantone color, you must calcuate the CMYK value inside a graphics program such as Photoshop. Once you have the CMYK value you can convert the color.
pantone 7401 coated
PC = process coated ec = euro coated
By "Pantone Color," you must be referring to Pantone Solid or Pantone Spot Color, because Pantone is the brand of a private company that sets the international standard for print colors. "Pantone" does not indicate that something is not CMYK.The mentioned company, Pantone, produces a swatch book called Pantone Bridge, and has the spot color on one column, and the CMYK process color on the other column so that you can see the color shift between solid and CMYK, as well as the CMYK breakdown. These swatch books are available online or in a local graphics supply store.
If you're printing the image on your desktop printer, use RGB--those printers will convert anything else to RGB, then to CMYK. If you're printing it on a wide-format inkjet printer like a Roland, Mutoh or VUtek, or you're sending it to a printing plant to be printed on an offset or flexo press, use CMYK if you're not using spot colors, and Pantone for the spot colors.
It's Pantone 363U and its variants on CMYK or JPEG.
This is a complicated process. To begin, TPX in Pantone stands for Textile Paper Extended. These colors are meant for printing on fabric. When one has a CMYK image in Photoshop the colors can not just be converted. The only way to incorporate spot color (Pantone) into a rasterized CMYK image is as an extra plate, or spot color channel in Photoshop. One can also create a monotone, duotone or tritone from a CMYK image. To do this the image can not remain in CMYK mode. The process is much easier to do in a vector file. Using the eye dropper or color picker tool in Photoshop one can measure the amount of cyan, magenta, yellow and black in a specific area. Using the swatches palette open the appropriate Pantone library, find the desired color and measure the CMYK content in the same manner. This process will reveal the CMYK equivalent for that specific color.
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cmyk color c=100 m=72 y=0 k=30
You can use pantone website color system cross-referencing.
cmyk color c=100 m=72 y=0 k=30