Can I use the travel insurance calculator to know the premium for multiple trips?

Yes, you can use the travel insurance premium calculator even if you are planning for multiple trips. When entering information into the calculator, you will be asked how many trips you are planning to take and insure. You can enter the number as desired and you will be shown results accordingly. 

Similarly, IFFCO-Tokio offers multi-trip travel insurance plans that cover several trips that you take within a year.