I just got a new canon 6d, put in a 32 gb card and set shooting mode at RAW. The camera indicates that I can only take 160 pictures! I am able to store 1000+ images in RAW on my t5 rebel. What's going on?
Canon 6D's RAW files are somewhere in 23 to 28 MB range (24-26 on average), depending on what settings (particularly ISO) you have and what theme you photograph.
Note: The size variance is due of Canon's CR2 has loseless compression inside as well as some JPG thumbnails/previews of the actual RAW data and also because, as I said, some settings (for example high ISOs) have a lower compression ratio (due of noise introduced).
So, let's say that we have on average 25 MB/file. On a 32 GB raw will fit 32*1024/25 ~ 1310 files.
1st, try to (re)format the card. Sometimes, the proprietary data put on card by one camera will cause problems on another cameras (Hasselblad cameras/PhaseOne backs are known to do this). See which is the empty space in GB on the card in the camera and in a computer. If the capacity is way off from 32 GB (expect some minimal difference for filesystem structures) then use the Disk Manager (on Windows) or an analogous tool on your operating system to see why the partition(s) is so small. If you will not see any 'unused space' or another partition which would justify the small capacity of the main partition then you have a fake. Return the product.
1200. Page 103 of the user manual says an 8 GB card holds approximately 300 shots which average 23.5 MB. Just multiply by 4 and you get how many images fit in 32 GB.
The size is approximate as it depends on image content but the counter which tells you how many images fit is also based on the approximate size since it cannot know how images you have not shot yet will compress! Expect being able to shoot ±20% from the estimate.
Format your card then since it is most likely you have other files in there. Perhaps from your old T5, so it might be good to take a peek in case there are images you want to keep in there.