How do you calculate fixed deposit interest before maturity?

To calculate fixed deposit interest before maturity, you can use the formula: Interest = Principal × Rate × Time. Here, the principal is the initial amount deposited, the rate is the annual interest rate (expressed as a decimal), and time is the duration the deposit has been held, typically expressed in years. Keep in mind that some banks may apply a penalty for early withdrawal, which can affect the final interest amount. It's advisable to check with your bank for specific terms and conditions regarding early withdrawal.