Over the past few months, intheBlk has been working on building a Black-Scholes calculator to assist accountants with their stock-based compensation expense. Our calculator allows users to enter the six inputs and have the Black-Scholes valuation automatically calculated. The two challenging inputs are the peer-group volatility and risk-free interest rate. Typically, users calculate these inputs in Excel by downloading historical data from Yahoo Finance and the US Treasury. intheBlk's calculator takes this burden away and automates the whole process.