Guides

How EMI Is CalculatedEMI (equated monthly installment) is calculated from three inputs — the loan principal, the monthly interest rate, and the number of monthly payments — using a fixed formula that produces the same payment amount for every month of the loan.

Fixed vs. Variable Rate Mortgages: Which Should You Choose?A fixed-rate mortgage locks in the same interest rate for the entire loan term, so the payment never changes; a variable (or adjustable) rate mortgage starts lower but can rise or fall over time as it tracks a benchmark rate, changing the payment along with it.

How Compound Interest WorksCompound interest is interest calculated on both the original principal and on interest already earned in previous periods, so a balance grows faster over time than it would under simple interest, which is calculated on the principal alone.

APR vs. Interest Rate: What's the Difference?The interest rate is the cost of borrowing the principal itself, expressed as a yearly percentage; the APR (annual percentage rate) folds in most lender fees and charges on top of that interest, giving a fuller — and usually higher — picture of a loan's true yearly cost.

BMI Explained: What It Measures and Where It Falls ShortBMI (body mass index) is a simple screening number calculated from height and weight, used to place adults into broad categories such as underweight, normal weight, overweight, and obese — but it does not directly measure body fat, muscle mass, or overall health.

Learn how the numbers work