On behalf of tpalz i thank you.Okay I'll bite as this is fairly painless. According to google it took .15 seconds to find this but if you are installing pavers you should know this off the top of your head. If you plan to continue doing larger paver jobs, take a training class - ICPI is the standard and it will teach you many useful tips including calculating materials.
For holland pavers (and basically all well installed non-tumbled pavers) you will get about 80-100 sf of coverage from a typical 50-60lb bag.
Larger pavers and tumbled pavers cuts your coverage in half. If you are using flagstone it all depends on the size of the joints between the stones but it most cases it cuts coverage by half again although we try to never use polymeric for flagstone.
Hope this helps.