IrfanView can do that, but you really ought to think about what it is you really want to do.
To resize an image to inches really depends upon a DPI (dots Per Inch) setting within the picture data. The DPI setting can be adjusted within a file and NOT change the actual pixel count at all. The end result MAY be a different printout of the same image, even though no pixel data has changed - at all!
For example, if you have an image that is 600 pixels wide and 300 pixels tall can you tell me what size the hardcopy will be?
NO you can't, because that pixel data alone is not enough to absolutely say what the hardcopy will be.
Taking those pixel dimensions (600 x 300) and at
200 DPI, the hardcopy would be 3" x 1.5", and at
150 DPI, the hardcopy would be 4" x 2", and at
100 DPI, the hardcopy would be 6" x 3",
and that is only when the horizontal and vertical DPI are identical (usually they are) but they can be different.
If I set the DPI to 150 horizontal and 100 vertical, then those setting could make the hardcopy to be 4" x 3" (the size you mentioned).
Notice I said could make. The reason is that the printing program could possibly ignore the DPI setting entirely. For example, if I put that exact same image into a Word document, and I set the frame, that the picture resides in, to print at 2 inches wide and 5 inches tall, I could. The DPI setting and the number of pixels would be ignored.
You never mentioned if the resulting inches, that you want are for the printout or for the screen display.
If you are talking about the size on the screen (not the hardcopy) then usually most display tools will display 1 picture pixel per 1 screen pixel. Also the number of pixels per inch on a screen is usually MUCH lower than what a printer prints at.
Many screens are approximately 72 pixels per inch - BUT you can not count on that. I have three LCD screens here (LCD becoming the most popular - but not the only kind) that have 85, and 91, and 146 PPI (Pixels Per Inch). So my display of that same image would change size depending upon what display I was using.
Hardcopy can avoid that variance with that setting of the DPI (data inside the file) IF the printer program follows the DPI setting. And even that can be ignored. I can use a picture printing program to print an image to result in any particular size - regardless of the number of pixels, or the DPI setting.
So ... what to do ...?
In a singe word... IrfanView can do any of it. There are many other image viewing/editing/printing programs around, as well. Some are more or less capable, but none are cheaper, since IrfanView is FREE.
I started off with not knowing what you wanted to do, and now it is up to you to decide what it is you want to do. You can either tell us more details and have someone here give you some more guidance, or you can just investigate and play with some of the tools, like IrfanView, that are around.
My key point here, though, is: do not think there is one answer to an ambiguous question like asking for a program to resize images to inches.
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