Let’s assume you run a company that has a SaaS product with multiple subscription plans. You want to find out what is your LTV.

Determine the number of customers. Let’s say you have 25 customers in total.
Calculate your MRR. You make a handsome $6000 a month.
The SaaS lifetime value calculator will automatically divide the MRR by the number of customers to get your ARPA – in this case, $250.
Decide on your gross margin. Let’s say that you need to spend 35% of your revenue on maintenance, so your gross margin is equal to 65%.
Determine your churn rate. Let’s say that during the first month, only 1 customer canceled their subscription plan. Will will assume that the churn rate will be constant. 1 of 25 customers is 4%.
Decide on the account expansion cost. Let’s say it is equal to $0 – you don’t plan to introduce an expansion option.
The LTV calculator will automatically find the LTV of your product. For our example, it is equal to $4062.50. That means that every customer you have will spend, on average, $4062.50 on your SaaS product before they unsubscribe.