The simplest way to calculate
a return on your investment is to subtract the cost of the marketing campaign
from the total amount of sales growth, as this is a measurement of your ROI
over a time period. The growth in sales
over time is a good measurement, as increased traffic will eventually lead to
higher sales, or a similar conversion you are looking to measure. Then you would divide that number by the
marketing cost again to get a percentage.
For example: (Sales Growth – Marketing Cost)/Marketing Cost=ROI
To show some numbers in the equation:
($1000-$100) / $100 = 9, which would translate to 9 times the
return on investment, or 900% ROI.
HubSpot also has a handy calculator that you can use for a more in-depth
look at your ROI.