Needed to add this and I keep forgetting it's here.  This helps me when I need to resize an image.  If it is 325 wide and 132 high, but needs to be 275 Wide, what would be the height?  EXACTLY!
Base Ratio:



=
Result Ratio:


Video sizes - This is interesting.
Nikon - 720 x 405
720/405 = 640/360
1440/810
1280/720
These are widescreen styles
640/480 are Nikon present image sizes
Normal image ratios are width x height:
based on 800x600 480x360
640x480
400x300
Thumbs:
290wide

Nikon Images are 1440x1080 = 720x540
720x540 can also be a video size
640/480 = 720/540
And Here.. I have more space for ????????

Link to square footage calculator.




Online Conversion

Check back for this place. Metric Conversions -- This works



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