Compound Interest Calculator
Compute compound interest on a principal over time with flexible compounding frequency.
Initial amount on which interest compounds.
Annual nominal interest rate.
Investment or loan tenure in years.
Generic compound interest without bank-product assumptions. A = P × (1 + r/n)^(n×t). Useful for loans, savings, and teaching — not a substitute for product-specific FD/RD calculators.
Compound vs simple interest?
Simple interest is calculated only on the principal each period. Compound interest adds prior interest to the principal, so you earn "interest on interest" — growth accelerates over time.
How does compounding frequency matter?
More frequent compounding (e.g. monthly vs yearly) yields a higher final amount for the same nominal rate because interest is reinvested sooner.
Is this the same as the FD calculator?
The core formula is identical, but the FD calculator is tailored to fixed-deposit products with tenure in months/years. This is a general-purpose compound interest tool.
Can I use this for loan interest?
Yes for estimating total interest on reducing-balance loans if you know the effective rate and tenure. For EMI breakdowns, use the EMI calculator instead.
Does this account for inflation?
No. The result is nominal future value. Subtract expected inflation to estimate real purchasing power.