According to Dwight Schrute, the Schrute Buck is worth 0.0001 US Dollars. 1,000 Schrute Bucks can also be exchanged for an extra five minutes of lunch break.
It can be extrapolated that the exchange rate of US Dollars to Schrute Bucks is approximately 10,000 and the exchange rate of Schrute Bucks to Extra Minutes at Lunch is approximately 0.005. The exchange rate of US Dollars to Extra Minutes at Lunch is approximately 50.
There is no currency exchange rate between Stanley Nickels and Schrute Bucks, and reputable sources claim that the ratio of Stanley Nickels to Schrute Bucks is approximately equal to "the ratio of unicorns to leprechauns" This could mean that there is a conversion ratio, we just cannot perceive their godly beings with our mortal human bodies. If we COULD perceive these beings, it is said that exactly 36.89 leprechauns equal exactly 1 unicorn. This means that the Stanley nickel is worth exactly 36.89 Schrute bucks, according to Stanley.
Schrute Bucks can now be purchased as a part of The Office Kit, which is available here.