Look at our guide for how you can get your conversion rate.

How many enquiries does it take you to get a customer? If you don't know then 20-25% is fairly normal.

This is the average value of a customer or a sale, e.g. how much does a new customer spend with you on average. You may want to take into account the lifetime value of a customer, e.g. if the average customer buys from you multiple times. This will give a more accurate view of the return on investment.