Facebook is going public, but what is it really worth? This interactive calculator is a basic two-step discounted cash flow model to help illustrate how variations in key assumptions can change the potential market value and share price of an IPO.

Enter your projections for Facebook’s sales growth, ebitda margin, and capex-to-sales ratio to see how these key assumptions affect the potential market value of the social networking group’s offering.

When you are satisfied with your model, you can share your Facebook valuation by clicking the Twitter button above the charts.