Compound Interest Calculator
Compound interest grows money on both principal and accumulated interest: A = P(1 + r/n)^(nt).
Add a monthly contribution to model regular saving.
How to use the Compound Interest Calculator
- Enter the starting principal.
- Enter the annual interest rate.
- Choose years and compounding frequency.
- Optionally add a monthly contribution.
Examples
₹1,00,000 at 10% for 10 years, yearly
Input: P=1,00,000
Result: ≈ ₹2,59,374
Frequently asked questions
What is the rule of 72?
Divide 72 by the annual rate to estimate the years needed to double money. At 8%, money doubles in about 9 years.
Does more frequent compounding make a big difference?
It helps slightly. 10% compounded monthly yields an effective 10.47% per year versus 10% compounded yearly.
Estimates, not tax or legal advice. Results come from the published rules for the cases this calculator covers; your own circumstances can change them.
Last checked 2026-10-29 by the TakeHomeWorld editors · How we calculate and check rates · Runs entirely in your browser; nothing you type is stored.