How does the small business calculator work?
Enter what you plan to invest, then choose how to measure the return. Use a dollar amount when you know what you expect to get back. Use the Return menu to switch to an annual rate instead, with or without compounding, over any time period.
How do I calculate the ROI of a business investment?
Subtract what you invested from what you got back, then divide by what you invested. An investment of $700 that returns $1,005 has a gain of $305, which is about a 43.6% ROI.
What should I count as the investment?
Count everything the project costs you, including equipment, software, contractors and marketing. A complete cost gives you an honest ROI and makes two projects easier to compare.