Online Banking
State Bank of India customers can register for internet banking services at their bank - if you have done so already this can be a very fast and efficient way of checking your balance without having to go to an ATM.
OnlineSBI can generate an account statement for a date range for any of your accounts. The statement includes transaction details, opening, closing and accumulated balance in the account.
The log in for Personal Accounts is here:
retail.onlinesbi.com/retail/login.htm
and for Corporate Accounts here:
www.onlinesbi.com/corporate/sbi/login.html
If you have not registered for internet banking you can do so at any State Bank of India Branch.
ATM
You can also check your Account Balance in the conventional way by finding an ATM and inserting your card. You'll be promoted to type in your pin - do so carefully making sure to obscure the view of the keypad to make sure nobody see's your pin.
Then you'll be given several options, the one you'll want is of course to check your balance so click on 'Display Balance' - this will bring up a screen displaying your balance. On this screen there will be an option to return your card, click the corresponding button to return your card.
Here's a helpful video guide on how to bank online with the State Bank of India: