If you hold the equivalent of $10,000 or more (the sum of all foreign bank accounts) on any given day between January 1st and December 31st, then you are required to file an FBAR.
To file your FBAR, visit this link.
For USD to INR conversion, you can use this link.
To file your FBAR, gather all your foreign bank account details including account number, bank name, and bank address. Note down the date on which you had the maximum amount in your account and use the USD to INR conversion link provided to convert foreign currency to USD. Click on the "Start Now" link in the online form to file online, which provides fast and immediate confirmation.
The entire process, from gathering bank details to successful filing, typically takes a maximum of 15 minutes.